New or interesting and lichenicolous fungi from Bel- gium, and northern . XII.

Paul Diederich1, Damien Ertz2, Dries Van den Broeck3, Pieter van den Boom4, Maarten Brand5 & Emmanuël Sérusiaux6

1 Musée national d’histoire naturelle, 25 rue Munster, L-2160 Luxembourg ([email protected]) 2 Jardin Botanique National de Belgique, Domaine de Bouchout, B-1860 Meise, Belgique ([email protected]) 3 Floridastraat 43 bus 1, B-2830 ([email protected]) 4 Arafura 16, NL-5691 JA Son, the ([email protected]) 5 Klipperwerf 5, NL-2317 DX Leiden, the Netherlands ([email protected]) 6 Plant and Conservation Biology Unit, University of Liège, Sart Tilman B22, B-4000 Liège, ([email protected])

Diederich, P., D. Ertz, D. Van den Broeck, P. van den Boom, M. Brand & E. Sérusiaux, 2009. New or interesting lichens and lichenicolous fungi from Belgium, Luxembourg and north- ern France. XII. Bulletin de la Société des naturalistes luxembourgeois 110: 75-92.

Abstract. Studies on large and mainly recent collections of lichens and lichenicolous fungi led to the addition of 19 taxa to the flora of Belgium, Luxembourg and northern France:Buelliella poetschii, Caloplaca arcis, C. coralliza, C. dichroa, C. oasis, C. pyracea, Gyalecta derivata, Lem- mopsis pelodes, Lepraria ecorticata, Leptogium aragonii, L. pulvinatum, Leptorhaphis laricis, Minutoexcipula tephromelae, Monodictys epilepraria, Phoma grumantiana, Polyblastia goth- ica, Ramalina canariensis, Sphaerellothecium cladoniae and Vouauxiella verrucosa. Another 22 additional taxa are reported in recent publications: Acarospora rufescens, Arrhenia pelti- gerina, Bacidia caesiovirens, B. subfuscula, B. sulphurella, Caloplaca itiana, C. ulcerosa, Car- bonea supersparsa, Chaenothecopsis ochroleuca, Endohyalina insularis, Lecanora helicopis, L. sarcopidoides, L. subsaligna, Lepraria zeorinica, paucispora, Parmotrema pseu- doreticulatum, Physcia tribacioides, Sphaerellothecium araneosum, S. parmeliae, Strigula sych- nogonoides, Verrucaria poly­sticta and V. xyloxena. The following species have to be deleted from the checklist: Acarospora smaragdula, Caloplaca britannica, C. lithophila, Lecanora albel- lula (syn. L. piniperda), Lepraria leuckertiana, Lichenochora inconspicua and Parmotrema stuppeum. Abrothallus acetabuli, Lepraria jackii, Phaeosporobolus usneae, Telogalla olivieri and Usnea flammea are newly reported for Belgium, and brachypoda, C. hispidula, Fellhanera viridisorediata, Lepraria sylvicola, Leptorhaphis epidermidis, Lichenoconium pyxida- tae, Tubeufia heterodermiaeand Verrucaria hegetschweileri for Luxembourg.

1. Introduction 2. Survey of other publications on the This paper continues the series of notes on flora and vegetation of the study area the flora of lichens and lichenicolous fungi in Kuborn & Diederich (2008) presented an Belgium, Luxembourg and northern France. inventory of the lichen flora of siliceous Although the former contribution was issued outcrops in the ‘Naturpark Obersauer’ in only a year ago (Ertz et al. 2008) a relatively Luxembourg (Ard.). They reported 197 large number of additions and changes to species, amongst which the lichenicolous the checklist of species present in that area fungi Carbonea supersparsa (Nyl.) Hertel, (Diederich & Sérusiaux 2000) can be done. Chaenothecopsis ochroleuca (Koerb.) Tibell This paper further includes the most recent & K. Ryman, Sphaerellothecium araneosum updates regarding the nomenclature and tax- (Arnold) Zopf and S. parmeliae Diederich & onomy of the species present. In the enumer- Etayo are new for the checklist area (Died- ation of specimens, the abbreviation ‘h’ refers erich & Sérusiaux 2000). Nine further spe- to the private herbarium of the collector. cies are new for Luxembourg.

Bull. Soc. Nat. luxemb. 110 (2009) 75 Garnier-Delcourt (2008) reported the dis- checklist of Belgium, Luxembourg and north- covery of the lichenicolous mushroom ern France. Buellia schaereri De Not., Didymel- Arrhenia peltigerina (Peck) Redhead et al. in lopsis pulposi (Zopf) Grube & Hafellner and the south of Luxembourg on thalli of Peltig- Hawksworthiana peltigericola (D. Hawksw.) era rufescens. U. Braun are new records for Belgium, whilst Kukwa & Flakus (2009) reported Lepraria the presence in Belgium of Bacidia subfuscula zeorinica (L. Saag) Kukwa as new to our (Nyl.) Th. Fr. is confirmed. Eighteen additional checklist area, based on material recently species are new for Flanders. collected in France (Ard.). Van den Broeck et al. (2008c) organized a Roux et al. (2009) described the new Calo- three days international excursion in the placa itiana Cl. Roux, M. Boulanger & Forêt de Soignes (Zoniënwoud) near Brus- from coastal rocks in northern France (Pas- sels. In total, 186 species were recorded, de-Calais, Boulonnais) within our study area. including several species characteristic for We have collected two further specimens of old forests, such as Pyrenula nitida and the same species: France, Mar.: Cap Gris Nez, Thelotrema lepadinum. à partir de la plage au N de Framzelle vers l’W, De Beer & Van den Broeck (2008), Van den sur une distance de 300 m (E22.15), alt. 5 m, Broeck (2008), Van den Broeck & Hantson sur des rochers en grès en bord de mer, 2000, (2008) and Van den Broeck et al. (2008a) P. Diederich 14387 (h) & J. Signoret; ibid., à listed the lichens observed or collected 400 m à l’W de la plage au N de Framzelle, during excursions in Flanders, organized by rochers à mi-pente, (E22.15), alt. 25 m, blocs the Vlaamse Werkgroep Bryologie en Liche- de grès dans végétation herbacée, 2000, P. nologie. In one of these papers (Van den Diederich 14455 & J. Signoret. Broeck 2008), the lichenicolous Arthonia apotheciorum (A. Massal.) Almq. is reported Giralt et al. (in press) report Endohyalina from Lecanora albescens. Until now, the entire insularis (Arnold) Giralt, van den Boom & Arthonia material from our study area grow- Elix [= Rinodina insularis (Arnold) Hafell- ing on L. albescens was included in the species ner] from northern France (Ardenne, concept of Arthonia lecanorina Almq. (Die- Chooz, lichenicolous on Lecanora rupicola). derich et al. 2009), a species described from The species is new for our checklist area. L. dispersa. As long as there is no evidence Rouxhet et al. (2008) described the vegeta- that the material on these hosts belongs to tion and flora of disused slate quarries near two distinct species, we prefer to keep all that (B Ard.) with a focus on the bryo- material under the name A. lecanorina. phytes and lichens. Indeed these sites host Van den Broeck et al. (2009) did a four some of the rarest species in our area of study days excursion to the Boulonnais in north- such as Cryptogramma crispa (fern), Bux- ern France. They report 55 species new for baumia aphylla (bryophyte) and the lichens the Boulonnais, including four new for our Arctoparmelia incurva, Lecanora silvae-nigrae checklist area: Bacidia caesiovirens S. Ekman and Melanelia sorediata. They confirmed that & Holien (previously known only from Scot- Brodoa atrofusca and Stereocaulon saxatile land, Ireland and Norway; photograph of have not been observed recently near Vielsalm fertile material shown in fig. 2), Lecanora and should therefore be considered extinct in helicopis (Wahlenb.) Ach., Strigula sychnogo- our study area. Species associated with metal- noides (Nitschke) R. C. Harris (sub Geisleria rich rocks are also observed in several disused s., illustrated in fig. 5) and Verrucaria polys- quarries with Acarospora sinopica, Rhizocar- ticta Borrer [this species has also recently pon oederi, Lecanora epanora, L. subaurea, L. been collected in Belgium: Mar.: Au NW de handelii and Placopsis lambii. Veurne, vers Sint-Idesbald, Ten Bogaarde Van den Broeck et al. (2008b) reported the Hoeve, vieux murs autour de la ferme près du discovery of Caloplaca ulcerosa Coppins & P. parking (C0.57), 2002, P. Diederich 15230 (h). James, Parmotrema pseudoreticulatum (Tav.) Fl.: Hundelgem (Zwalm), kerk (E3.13), on Hale, Physcia tribacioides Nyl. and Verrucaria calcareous wall, 2008, D. Van den Broeck 2746 xyloxena Norman, which are new for the (h)]. Three further species that would be

76 Bull. Soc. Nat. luxemb. 110 (2009) new for our checklist are provisionally not de Lesdain 1914: 100), we provisionally accepted: Lecania aipospila (Wahlenb.) Th. Fr. include it in A. rufescens as well. (specimen A. Aptroot 68728 represents ster- Van den Boom & Brand (2008a) masterly ile L. cf. fructigena), Phaeopyxis punctum (A. revised the Lecanora saligna-group in west- Massal.) Rambold, Triebel & Coppins (speci- ern and central Europe. L. saligna (Schrad.) men A. Aptroot 68738 is Cladonia rangiformis Zahlbr. is confirmed as being a common spe- without visible lichenicolous ), and cies in Belgium and Luxembourg. L. albellula Xanthoria aureola (Ach.) Erichsen (specimen Nyl. (syn. L. piniperda Körb.) does not occur A. Aptroot 68741 contains a pebble with a in Belgium and Luxembourg and must be yellow and an orange thallus of X. parietina; removed from the checklist (Diederich & although these might be genetically distinct, Sérusiaux 2000). The new L. subsaligna M. the orange thallus does not have the typical Brand & van den Boom (type locality in morphology of X. aureola). Belgium!) is not rare in Belgium and Lux- Hellemans (2008) reported 72 lichen species embourg. L. sarcopidoides (A. Massal.) A. L. from a nature reserve in Belgium (Camp.). Sm. is recorded from three Belgian localities and is new for the checklist area. Aptroot & Stapper (2008) presented a report on two excursions in 2006 and 2007 in the Gueidan et al. (2009) proposed a new generic Northern Eifel in Germany and the adjacent classification of the , based on in Belgium. A total of 422 species molecular and morphological evidence. The were recorded. following changes concern the checklist of Bel- gium, Luxembourg and northern France: the Three lichen species were recorded by Kill- type species of Verrucaria, V. rupestris Schrad., mann & Fischer (2008) in Luxembourg is considered as a distinct species and not a close to the German border. synonym of V. muralis Ach; Verrucaria maura and V. rheitrophila are combined in the new Hydropunctaria (see Table 1); and Ver- 3. Taxonomical and nomenclatural changes rucaria cyanea and V. dufourii are combined in the new genus Parabagliettoa (see Table 1). Wedin et al. (2009) demonstrated that the name Acarospora smaragdula (Wahlenb.) Breuss (2009) revised the genus Placop- A. Massal. must be used exclusively for yrenium, and accepted four taxa occuring in specimens with a K+ red thallus (norstic- our checklist area, viz. P. canellum (Nyl.) Guei- tic ac.). Aptroot et al. (2008a) suggest that dan & Cl. Roux (syn. Verrucaria canella Nyl.), the Dutch material called A. smaragdula, P. fuscellum (Turner) Gueidan & Cl. Roux but with a K– thallus, is better referred to as (syn. V. fuscella (Turner) Winch & Thornhill), Acarospora rufescens (Ach.) Bausch. This spe- P. trachyticum (Hazsl.) Breuss var. trachyti- cies was reported from Belgium by Purvis cum and P. t. var. subtrachyticum (B. de Lesd.) et al. (1992: 61-62), but without reference Breuss, the latter having been described from to any specimens, and therefore the species our study area (northern France, Dunkerque). was not accepted in our Checklist (Died- Following Coppins & Aptroot (2008), the erich & Sérusiaux 2000). We accept Aptroot’s sorediate, blastidiate or isidiate, often sterile decision, and we propose to name all ‘sma- morphs of Verrucaria macrostoma DC. may ragdula’ specimens from our checklist area be called f. furfuracea B. de Lesd., and those A. rufescens. Following Aptroot et al. (2008a), of V. nigrescens Pers. f. tectorum (A. Massal.) the genuine, K+ red reacting A. smaragdula Coppins & Aptroot. occurs in the Netherlands only on sea-dikes; Thüs & Schultz (2008) considered Verru- it should be looked for in similar habitats in caria lignicola (B. de Lesd.) Zschacke, a spe- Belgium. Acarospora fusca B. de Lesd., a spe- cies described from Alnus roots in a river cies described from our study area (northern in the Belgian Ardenne, as a synonym of V. France, Dunkerque), was included in A. sma- sublobulata Servít, but they did not discuss ragdula by Diederich & Sérusiaux (2000). As the reason of their decision nor state if they the thallus of the type specimen is K– (Bouly saw authentic material of V. lignicola.

Bull. Soc. Nat. luxemb. 110 (2009) 77 Table 1. Changes of generic position adopted in the checklist (Diederich & Sérusiaux 2000) and subsequent papers following new taxonomical studies.

Former generic position New generic position References Arthonia varia (Tul.) Jatta Phacothecium varium (Tul.) Trevis. Hafellner (2009) Kalaallia reactiva Alstrup & Opegrapha reactiva (Alstrup & D. Hawksw.) Etayo (2008: 159) D. Hawksw. Etayo & Diederich Lecania hyalina (Fr.) R. Sant. Biatora globulosa (Flörke) Fr. Smith et al. (2009: 975) Opegrapha atra Pers. Arthonia atra (Pers.) A. Schneid. Ertz et al. (2009) Opegrapha calcarea Sm. Arthonia calcarea (Sm.) Ertz & Diederich Ertz et al. (2009) Pronectria leptaleae (J. Steiner) Xenonectriella leptaleae (J. Steiner) Rossman Etayo (2008: 270-279) Lowen & Lowen Pronectria ornamentata (D. Xenonectriella ornamentata (D. Hawksw.) Etayo (2008: 270-279) Hawksw.) Lowen Rossman Pyrenocollema chlorococcum Collemopsidium chlorococcum (Aptroot & van Coppins & Aptroot Aptroot & van den Boom den Boom) Coppins & Aptroot (2008) Verrucaria cyanea A. Massal. Parabagliettoa cyanea (A. Massal.) Gueidan & Gueidan et al. (2009) Cl. Roux Verrucaria dufourii DC. Parabagliettoa dufourii (DC.) Gueidan & Cl. Gueidan et al. (2009) Roux Verrucaria maura Wahlenb. Hydropunctaria maura (Wahlenb.) Keller, Gueidan et al. (2009) Gueidan & Thüs Verrucaria rheitrophila Hydropunctaria rheitrophila (Zschacke) Keller, Gueidan et al. (2009) Zschacke Gueidan & Thüs

Following the new edition of the British the oldest name R. oleae must be used for lichen flora (Smith et al. 2009), the- cor this species. rect name for Verrucaria hydrela auct., non The epithet pseudoreticulatum (Tav.) Hale has Ach. is V. denudata Zschacke, and the cor- to be used for the Belgian material previously rect name for Diplotomma hedinianum (H. called Parmotrema stuppeum (Taylor) Hale Magn.) P. Clerc & Cl. Roux should be D. (Aptroot et al. 2008b, Van den Broeck et al. hedinii (H. Magn.) P. Clerc & Cl. Roux. 2008b). Recent molecular studies have con- Laundon (2003) recognized esorediate spec- firmed that this species is distinct fromP. retic- imens of Lecanora conizaeoides as the forma ulatum (Taylor) Choisy (Divakar et al. 2005). variola (Arnold) J. R. Laundon. Etayo & Navarro-Rosinés (2008) described the new lichenicolous Lichenochora paucis- 4. New or interesting reports pora Etayo & Nav.-Ros. from Great Britain and Luxembourg on Bilimbia sabuletorum. The Abrothallus acetabuli Diederich Luxembourg specimen had been published Belgium, Mosan: Falmignoul (J5.17), on Fraxinus as L. inconspicua Hafellner by Sérusiaux et al. along road, on Pleurosticta acetabulum, 2009, D. (1999), a species obviously confined to Myco- Van den Broeck 3274 (h); Doisches, le long de la bilimbia berengeriana, and that species has route Philippeville-Givet juste au N de Doisches, therefore to be deleted from the checklist of au niveau de la “Haie Gabaux” (J5.24), tronc de Belgium, Luxembourg and northern France. Fraxinus en bord de route à proximité d’un bois, sur P. acetabulum, 2008, D. Ertz 12299 (BR). Roux (2009) showed that the species formerly called Naetrocymbe saxicola (A. Massal.) R. A lichenicolous ascomycete new for Belgium. C. Harris in our area of study does not repre- sent that species, but a non-lichenized, uni- Abrothallus parmeliarum (Hoffm.) Ach. dentified species of Arthopyrenia. Belgium, Ard.: Louette-St-Pierre (K5.27), on Kaschik (2006) demonstrated that the saxi- Parmelia saxatilis, 1870, F. Gravet (BR). colous Rinodina gennarii Bagl. and the corti- This lichenicolous ascomycete was known colous R. oleae Bagl. are synonyms, and that from a single record in Belgium (Ard.), where

78 Bull. Soc. Nat. luxemb. 110 (2009) it was collected in 1891 on Parmelia saxatilis. rocks and Xerobrometum, on E. pusillum, 1999, This second specimen confirms its presence in P. van den Boom 22689 (h); Comblain-au-Pont, the Belgian Ardennes during the 19th century. Chession (G7.23), à la base d’une paroi de calcaire compact, éclairée et au bord d’une route à forte cir- culation, on Endocarpon, 2001, D. Ertz (BR). Bacidia arnoldiana Körb. s.str. Netherlands: Z Limburg, Bemelen (E7.26), E Belgium, Mosan: Viroinval/Treignes, vallée du exposed soft calcareous rock, on E. pusillum, Ruisseau des Fonds de Ri, lieu-dit ‘Roche-aux- 1989, P. van den Boom 9151a (h). Chevaux’ (J5.33), 1999, sur une paroi calcaire verticale ombragée, P. Diederich 14214; au N du This recently described lichenicolous asco- village de Sosoye, Montagne de Sosoye, réserve mycete (Hafellner et al. 2008) was known naturelle sur le versant gauche de la Molignée from Austria, Switzerland and the U.S.A., (H5.35), 2002, affleurement rocheux calcaire, D. always on the thalli of Endocarpon species. Ertz 723 (LG); 0.5 km E of Marche-en- It is new for our checklist area, and also for (H6.47), 1990, vertical shaded brick, P. van den the Netherlands. Boom 9515 (h, LG); , left side of the river , W of the railway bridge over river Ourthe (G7.52), 1998, natural calcareous outcrop, E. Caloplaca arcis (Poelt & Vězda) Arup Sérusiaux (LG); Wavreille, right side of the Ri Belgium, Fl.: ENE of Brugge, Moerkerke centre, des Boyes near Chenet, N of ‘Trous des Lutons’ brick wall along churchyard (C2.14), 2000, P. van (J6.35), 1997, sheltered limestone outcrop, E. den Boom 24277, 24279 (h). Camp.: Kerkhof­ Sérusiaux (LG); 1 km SE of (H7.31), 1990, muur Meerle (A5.55), betonnen afdekplaat, shaded rockface, P. van den Boom 9533 (h, LG). 2003, D. Van den Broeck (h, herb. Diederich). Luxembourg, Lorr.: E Rollingen, Dréiburen Brab.: Bellingen (Pepingen), protestant church (L8.35), 1983, sur une paroi verticale suintante (E4.52), on wall around churchyard, 2003, A. en béton près d’une source, P. Diederich 5820 Aptroot 59238 (h, herb. Diederich); Gooik, prot- (h); ibid., 1987, sur une paroi ombragée en grès, estant church (E4.41), on wall of church, 2003, A. P. Diederich 7841 (h); au SW de Grevenmacher, Aptroot 59229 (h, herb. Diederich). Kelsbaach (L9.53), 1996, sur un rocher en cal- The Netherlands: Friesland: Gaasterland, dike, SW caire coquillier, P. Diederich 12403 (h). of Roode Klif, on basalt, 1989, P. van den Boom 9223 Brand et al. (2009) demonstrated that two (h). Utrecht: Spakenburg, former ‘Zuiderzee dijk’, on basalt, 1983, P. van den Boom 581 (h). Noord- species can be recognized within Bacidi(n)a Brabant: Boxtel, ‘St. Petrus’ church, on N exposed arnoldiana: the saxicolous Bacidia arnoldiana brick wall, 1989, P. van den Boom 7313 (h). s.str., and the corticolous B. sulphurella Samp. Arup (2006) reported this species from a The former species is reported by these authors few localities in Austria, Great Britain and from Belgium and the latter from Belgium and Sweden. However, in the Netherlands C. arcis Luxembourg. As almost all previously known is a common species, and in western Belgium data from our checklist area are corticolous it seems to be rather common too (selection and thus belong to B. sulphurella, we give here of specimens cited above). We have seen sev- a complete list of the much rarer B. arnoldiana. eral specimens from Belgium and the Neth- erlands identified as Caloplaca britannica R. Buellia violaceofusca Thor & Muhr Sant., but that species has a different ecology Belgium, Ard.: , 4 km S of Chanly, ruisseau le and is known only from seashore rocks in Glan (J6.54), on Fraxinus, 2007, D. Ertz 10169 (BR). Western Europe. Caloplaca arcis is new for This rare species was previously known from the checklist of Belgium, Luxembourg and one locality in the Belgian Ardennes (Séru- northern France, whilst C. britannica has to siaux et al. 1999). be removed from that checklist.

Buelliella poetschii Hafellner Caloplaca coralliza Arup & Åkelius Belgium, Mosan: SW of Wavreilles, 1 km ENE of Belgium, Mosan: Boussu-lez-Walcourt, route de Belvaux, E side of Lesse (J6.34), SW exposed steep Beaumont (H4.55), on Ulmus, 1964, J. Lambinon limestone slope with Xerobromion communities, 64/1547 (LG); SE of Havelange, S of Maffe, Somal, on Endocarpon, 2001, P. & B. van den Boom (h); near Somme (H6.27), on Salix, 1995, P. van den Dinant, BNVR nature reserve of ‘Devant-Bou- Boom 16653 (h); SE of Rochefort, near entrance vignes’ (H5.37), SW exposed sloping calcareous of caves (J6.15), on Tilia, 2001, P. van den Boom

Bull. Soc. Nat. luxemb. 110 (2009) 79 26433 (h); Rochefort, SE side of village (J6.25), on ish thallus and is usually fertile with many Tilia, 2001, P. van den Boom 26409 (h). Ard.: St- apothecia. A revision of the material from our Hubert, bord de la route de Champlon près de la study area showed that almost all specimens colonie pénit. agricole (J6.58), on Fraxinus, 1964, J. belong to C. coralliza, but yielded one speci- Lambinon 64/658 (LG); Sugny, route de Gedinne, à la lisière S du bois de Mohimon (L5.17), on Acer men definitely belonging toC. herbidella (see pseudoplatanus, 1965, J. Lambinon 65/834 (LG); below). C. coralliza is new for our study area. Villance, Bonipré, route de Libin-Wellin (K6.15), on Fraxinus and Juglans, 1965, J. Lambinon 65/935, Caloplaca coronata (Körb.) J. Steiner 936 (LG); , au S de la commune, aux Belgium, Mosan: Dinant, Moniat (rochers de la confins de , bois St-Michel (J6.38), on Quercus, 1969, E. Jacques 6810 (BR) & J. Lambinon rive gauche) (H5.47), paroi calcaire ensoleillée, 69/94 (LG); vallée de la Masblette, entre le ruisseau 1980, E. Sérusiaux 2091 (LG); Sosoye, Rochers du Pied de Boeuf et le Pont Mauricy (J6.47), sur de Sosoye (H5.35), tête rocheuse plus ou moins Quercus, 1983, E. Sérusiaux 4952 (LG); Nassogne, isolée, 1962, J. Lambinon 62/927bis (LG); 15 km S haut de la vallée de la Diglette (J6.37), sur Quercus, of Philippeville, SE of Nismes, Fondry des Chiens 1984, E. Sérusiaux 6189, 6191, 6193 (LG); SW of (J5.41), S exposed sloping limestone outcrops, , ruins of castle (L6.25), on Quercus, 1991, P. van den Boom 11026 (h). 1996, P. van den Boom 17660 (h); ibid., 2008, D. France, Mar.: Pas-de-Calais, Cap Gris-Nez, à 400 Van den Broeck 185 (h). Lorr.: St-Vincent, route m à l’W de la plage au N de Framzelle, rochers à de Jamoigne vers la Soye, à hauteur du ruisseau de mi-pente (E22.15), blocs de grès dans végétation la Blanche Fontaine (L7.51), on Carpinus, 1983, herbacée, 2000, P. Diederich 14448 (h) & J. Signoret. E. Sérusiaux 4886 (LG); Etalle, au SE de Buzenol, vallée de la Rouge-Eau, en aval du passage de la Most specimens named Calo- route Etalle-St-Léger (M7.14), on Quercus, 1984, placa coronata were wrongly identified and E. Sérusiaux 6458 (LG). proved to belong to the recently described C. Luxembourg Ard.: S of Hoscheid, Banzenhu- dichroa. The genuineC. coronata has a more uscht, road to Goebelsmuhle (K8.24), on Fraxi- southern distribution and is most probably a nus, 1995, P. van den Boom 16804 (h). Lorr.: common species in the Mediterranean area. Berdorf, Zickzackschlëff (K9.51), on Quercus, Our Belgian and French records (see above) 1984, P. Diederich 5502 (h) & E. Sérusiaux 6442 are likely to be at the northern limit of the (LG); N of Fischbach (L8.36), on Quercus, 1984, distribution zone of the species. P. Diederich 5867 (h); Larochette, vallon du Man- zebaach (L8.27), on Quercus, 1985, P. Diederich 6087 (h); E of Schieren, Kieselbaach (K8.55), Caloplaca dichroa Arup on Quercus, 1986, P. Diederich 7506 (h); SW of Belgium, Mar.: Nieuport, muret d’un petit pont Nommern, Nommerlayen (L8.26), on Quercus, sur un fossé au bord de la route de Furnes (C1.41), 1986, P. Diederich 7552 (h); SSW of Echternach, S 1967, J. Lambinon 67/382 (LG). Fl.: W of Ant- of Michelshaff, Maenhoelzchen (L9.22), onQuer - werpen, NW of St. Niklaas, St-Pauwels (C4.32), cus, 1987, P. Diederich 8446 (h); Graulinster, au on shaded N exposed wall of church, 1998, P. bord de l’ancienne route vers Junglinster (L8.38), van den Boom 19946 (h). Camp.: , old on Sorbus domestica, 1995, P. Diederich 12280 churchyard (B5.48), on calcareous stone, 1993, P. (h). Larochette, près de la ferme Weydert (L8.27), van den Boom 15052 (h). Mosan: Sosoye, Rochers on S. domestica, 1998, P. Diederich 13488 (h). de Sosoye (H5.35), tête rocheuse plus ou moins France (Ard.): Ardennes, S of Givet, Hargnies, isolée, 1962, J. Lambinon 62/927, 930 (LG); Yvoir, centre, big square with mature Tilia trees (J5.55), rocher de Champalle (H5.27), tête de rochers cal- on Tilia, 2000, P. van den Boom 24419 (h). caires, 1967, J. Lambinon 67/374 (LG); Huccorgne, Germany (Lorr.): Rheinland-Pfalz, N of Bollen- versant droit du Fond de Roua près du château de dorf (K9.41), on Quercus, 1984, P. Diederich 5679 Famelette (F6.54), rochers calc. ensoleillés, 1963, (h) & E. Sérusiaux 6603 (LG). J. Lambinon 63/1731 (LG); Dion-le-Val, falaise au In their revision of the Caloplaca herbidella N du ruisseau (J5.37), sommet de falaise, rocher de calcaires givetien ensoleillé, fréquenté par les group, Arup & Åkelius (2009) demonstrated oiseaux, 1982, P. Malaise & E. Sérusiaux 2687 (LG); that C. herbidella s. lat. consists of two distinct Han-sur-Lesse, Belvédère (NE of village) (J6.24), species: the mainly sterile species with an on sheltered and N-exposed limestone outcrop, orange thallus is described as the new C. cor- 1997, P. van den Boom 18729 (h). Ard.: St-Hubert, alliza [= C. herbidella f. rufa (B. de Lesd.) H. parking du Fourneau St-Michel, sur une vieille Magn.], whilst C. herbidella s. str. has a grey- ‘roue à aubes’ (J6.47), 1997, P. Diederich 12664 (h).

80 Bull. Soc. Nat. luxemb. 110 (2009) Luxembourg, Lorr.: Hamm, rocher au-dessus 5319 (h); S of Maastricht, S of St-Pietersberg, ESE du carrefour de la rue Godchaux (piste cyclable) of Kanne, near Caester (E7.35), on Sambucus, avec la rue des Draperies (M8.26), sur une sur- 2009, P. van den Boom 41458 (h). face horizontale ensoleillée en grès, 1997, P. Die- Luxembourg (Lorr.): Schifflange, Brill (M8.43), derich 13428 (h). on Populus, 1986, P. Diederich 7143 (h); Schou- France, Mosan: Ardennes, extrémité aval des weiler, vers Bascharage, à 1,2 km après la sortie rochers de Chooz (rive droite de la Meuse) du village, le long de la route principale (M8.22), (J5.35), bloc rocheux calcareux du Couvinien on Tilia, 1999, P. Diederich 13857 (h). infér. sur la crête, 1970, J. Lambinon 70/465 (LG). The recent revision by Arup (2009) of the The Netherlands: Noord-Brabant: SW of Valken- Caloplaca holocarpa group established defi- swaard, SW of Bergeyk, Loo, churchyard, on con- crete, 1991, P. van den Boom 12125 (h). nitely the name for this characteristic spe- cies. It generally grows on the bark of diverse As mentioned above, the recently described trees, especially Populus, though one Belgian Caloplaca dichroa has generally been mis- specimen is saxicolous. Although the name taken for C. coronata in Central and North- C. pyracea was often used for Caloplaca ern Europe (Arup 2006). Reexamination of specimens of the C. holocarpa group in the our material of C. coronata made clear that past, the species under the current modern that species is very rare in southern Bel- circumscription is new for the checklist of gium and that C. dichroa is most probably Belgium, Luxembourg and northern France. common throughout the Benelux countries, especially on concrete and calcareous rocks. Caloplaca dichroa is new for our study area. Caloplaca ulcerosa Coppins & P. James Luxembourg, Lorr.: N of Reckange (Mersch), Caloplaca herbidella (Hue) H. Magn. Eenelter Kapelle (L8.24), on an old trunk of Aes- culus near a chapel, 2009, P. Diederich 16844 (h). Belgium, Ard.: St-Hubert, bord de la route de Champlon près de la colonie pénit. agricole A very rare species, recently reported as new (J6.58), tronc de Fraxinus en bord de route, 1964, for Belgium (Van den Broeck et al. 2008b) J. Lambinon 64/659 (LG). and France (Van den Broeck et al. 2009) See comments under Caloplaca coralliza. from the Maritime and Boulogne districts. New for Luxembourg. Caloplaca oasis (A. Massal.) Szatala Cetraria islandica (L.) Ach Arup (2009) showed that the type of Calo- placa lithophila is a poorly developed speci- Belgium, Camp.: Hechtel-Eksel, In Den Brand men belonging either to C. vitellinula (Nyl.) H. (C6.47), terricolous, 2008, obs. D. Van den Olivier or to C. holocarpa. The correct name Broeck; Hechtel-Eksel, Vlasmeer (C6.47), terri- for the common species growing on calcare- colous, 2008, obs. D. Van den Broeck. ous rocks, mortar and concrete that was called This species was widespread in the Belgian C. lithophila in our area of study (Diederich & Ardennes and districts, but almost Sérusiaux 2000) is C. oasis. Caloplaca oasis is all populations disappeared. Sérusiaux et al. new for our study area, whilst C. lithophila has (2004) reported just one recent locality in the to be removed from the checklist. Campine district (see also Ertz et al. 2008). It is therefore interesting to inform on two recently Caloplaca pyracea (Ach.) Th. Fr. discovered populations in that district. Belgium: S. loc., sur écorce, 1861, ? (BR, in herb. Westendorp). Fl.: Lint, Luytersheide (C4.48), Chaenotheca brachypoda (Ach.) Tibell on Populus, 2005, D. Van den Broeck 1594 (h). Luxembourg, Ard.: NW of Bourscheid, Dirbach, Camp.: Westmeerbeek, Haterbeekweg (D5.26), near hotel ‘Dirbach Plage’, mixed forest along on Populus, 2005, D. Van den Broeck 1601 (h). river Sure (K8.33), on decorticated trunk of Mosan: Onhaye, sablière abandonnée située à 1 Alnus, 2009, P. & B. van den Boom 43428 (h). km au NW du centre de Onhaye (H5.46), on Pop- ulus, 2008, D. Ertz 12174 (BR); Neu Moresnet, This species was known from a few Belgian castle Eyneburg (F8.13), on well-lit horizontal localities (Diederich et al. 2009) and is here surface of calcareous wall, 1987, P. van den Boom newly reported from Luxemburg.

Bull. Soc. Nat. luxemb. 110 (2009) 81 Chaenotheca hispidula (Ach.) Zahlbr. assess the status of the species and conserva- Luxembourg, Ard.: NW of Bourscheid, Dirbach, tion projects have been conducted with the near hotel ‘Dirbach Plage’, mixed forest along funding of official Agencies (see http://www. river Sure (K8.33), on decorticated trunk of thebls.org.uk/content/survey.html) ; further a Alnus, 2009, P. & B. van den Boom 43427 (h). species action plan has been adopted (http:// C. hispidula is an inconspicuous species rarely www.ukbap.org.uk/UKPlans.aspx?ID=234). found in Belgium (Ertz & Duvivier 2006), but A single recent locality is mentioned by Wirth possibly overlooked. It is new to Luxembourg. (1995) for SW Germany, and no recent local- ity is known in France (C. Roux, pers. comm., 1 Sept. 2009). Collema dichotomum (With.) Coppins & J. R. Laundon (Fig. 1) Collema dichotomum grows in freshwater Belgium, Ard.: Near Nisramont (J7.25), siliceous rivers and is almost permanently inundated; rocks in the river Ourthe, 2009, E. Sérusiaux s. it is very sensitive to eutrophication and any n. (LG). pollution or mechanical damage to the river bed. It is thus very interesting that a com- This species was considered as extinct in the pletely unprotected section of the Ourthe river area of study (Sérusiaux et al. 2004) as the in Belgium still hosts a nice population of that latest localities of that species were explored lichen. At the European scale, C. dichotomum in 2001 in vain. The most recent herbarium is the most interesting macrolichen occuring specimen was collected by J. Lambinon in in our area of study and deserves special moni- 1967 near Nisramont, in the Ourthe valley. toring and effective protection of its habitat. Quite surprizingly, healthy populations of the species were observed during this Cyrtidula quercus (A. Massal.) Minks summer (August 2009) in the same locali- ties. Obviously rather low level of the river Belgium, Camp.: , Boskantweg (A5.54), on Quercus, 2008, D. Van den Broeck 2454 allowed detection of the species which was (h); , Zuymoeren (B4.28), on Quercus, probably overlooked in 2001. 2008, D. Van den Broeck 2447 (h); , Raamberg Collema dichotomum is a rare species (C5.38), on Quercus, 2008, D. Van den Broeck 2467 throughout Europe (Degelius 1954) and (h); Westerlo, Zwarte Heide (C5.57), on Quer- was included as ‘endangered’ in the Lichens cus, 2008, D. Van den Broeck 2532 (h); , Dijkstraat (C6.52), on Quercus, 2008, D. Van den Red List for Europe by Sérusiaux (1989), an Broeck 2366 (h). Fl: Sint-Amands, Breutheide option confirmed by Church et al. (1996) in (D4.23), on Quercus, 2008, D. Van den Broeck a similar analysis for the lichens in Britain. 2551 (h); Oostkamp, Westkantstraat (D2.11), on In England as well as in Scotland, surveys to Quercus, 2008, D. Van den Broeck 2507 (h). Brab.:

Fig. 1. Collema dichoto- mum, an aquatic lichen recently rediscovered in the Ourthe river in Bel- gium (Ard.).

82 Bull. Soc. Nat. luxemb. 110 (2009) Fig. 2. Lemmopsis pelodes, an extremely rare or over- looked terricolous lichen, collected in Belgium (Brab.). Scale bar = 0.5 mm.

Gingelom, Wintboomstraat, Hoogstraten (E6.54), ers de Freyr and Trou de la Jeunesse (H5.57), on on Quercus, 2005, D. Van den Broeck 2083 (h). Fraxinus, 2009, D. Van den Broeck 3276 (h). A non-lichenized species previously known New to the checklist of Belgium, Luxem- from three localities in eastern Belgium (Died- bourg and northern France. erich et al. 1991). The discovery of many locali- ties in Flanders suggests that the species must be Lemmopsis pelodes (Stein) T. L. Ellis (Fig. 2) widespread and common in our study area, but Belgium, Brab.: S of Hasselt, E of St Truiden, Borg­ frequently overlooked. In the Netherlands, the loon, churchyard (E6.47), terricolous on path, species is common but seems to have declined 2009, P. & B. van den Boom 43168, 43170 (h). in recent years due to pollution with ammonia. This extremely rare or overlooked species, previously known from Lithuania, Poland, Fellhanera viridisorediata Aptroot, M. Sweden (Jørgensen & Motiejūnaitė 2005) Brand & Spier and the Netherlands (Aptroot et al. 2008a, Luxembourg, Ard.: SE of Hoscheid, W of Gralingen, van den Boom & Brand 2008b) is new for along small road near military depot (K8.25), on our study area. Picea twigs, 2009, P. & B. van den Boom 43444 (h). This species is very common in the southern Lepraria ecorticata (J. R. Laundon) Kukwa Netherlands and has certainly been much Sérusiaux et al. (2003) published Lecanora overlooked in Belgium. Most Benelux speci- leuckertiana Zedda as new for Belgium. This mens are sterile, often not clearly soredi- species has recently been transferred to Lep- ate, and soralia are often confluent, as in the raria, as Lepraria leuckertiana (Zedda) L. Saag above specimen. In case of doubts of identi- (Saag et al. 2009). However, re-examination fication, roccellic acid is easily detected in an of the Belgian material proved that it does acetone extract, in which tiny curved needle- not belong to L. leuckertiana, a mainly corti- like structures are visible that are not birefrin- colous species with a thick medulla and indis- gent in polarized light. New for Luxembourg. tinctly lobate margins, but to Lepraria ecorti- cata, a mainly saxicolous species in which a Gyalecta derivata (Nyl.) H. Olivier non-lobate thallus lacks a distinct medulla. L. Belgium, Mosan: Dinant, between Falmignoul leuckertiana has therefore to be deleted from and Anseremme, Meuse valley, between Roch- our checklist, whilst L. ecorticata is new for it.

Bull. Soc. Nat. luxemb. 110 (2009) 83 Nelsen et al. (2008) demonstrated that two aragonii, L. gelatinosum and L. pulvinatum. usnic-containing Lepraria-species, viz. We revised the entire material of our study L. coriensis (Hue) Sipman and L. usnica area and present here lists of specimens Sipman do not group with Lepraria s.str. in a of each of these three species. Leptogium phylogenetic analysis. They did not include aragonii is new for the checklist of Belgium, in their study other usnic-containing taxa, Luxembourg and northern France, whilst L. such as L. ecorticata or L. leuckertiana. pulvinatum, a frequently used name in the past, has to be added to that checklist. Lepraria jackii Tønsberg Belgium, Mosan: Rouillon, les Tiennes de Rouil- Leptogium gelatinosum (With.) J. R. Laundon lon (H5.16), sur une petite paroi rocheuse, 2008, Selected specimens examind: Belgium, Mar.: D. Ertz 12224 (BR); Gozée, abbaye d’Aulne, rive Knokke-Heist, Zeedijk-Het Zoute, in dunes droite de la Sambre (H4.15), affleurement siliceux (B2.33), 2002, D. Van den Broeck 535 (h); De Panne, en sous-bois de feuillus, 2008, D. Ertz 12316 (BR). Westhoek, Konijnenpad, (C0.56), 1988, M. Brand Ard.: SE of Eupen, Hautes Fagnes, E of Hertogen- 17922 (h); 2 km NNW of Nieuwport, Ijzermond- wald, N side along road to Monschau, nature ing (C1.41), 1988, M. Brand 17940 (h). Mosan: reserve, path from Brackvenn to Nahtsief, moor Montagne aux Buis, Roche à Lomme (J5.41), 1986 & small woodland (F8.56), on Populus, 2001, P. & & 2003, M. Brand 15163 (h), D. Van den Broeck B. van den Boom 27970 (h) (TLC by M. Kukwa). 409 (h); Ciergnon, bord de route Dinant-Neu- This species was known from one locality in fchâteau (J6.12), 1967, J. Lambinon 67/329 (LG); Luxembourg (van den Boom et al. 1996a) Arbre, vallée du Burnot, env. de la ferme de Neffe (H5.16), 1982, E. Sérusiaux 4608 (LG); Dinant, and is here reported as new for Belgium. colline de Froideveau, anciennes carrières des Rivages (H5.47), 1974, J. Lambinon 74/191 (LG); Lepraria sylvicola Orange Grandhan, talus au bord de la route vers Melreux Luxembourg, Ard.: SE of Esch-sur-Sûre, N of Hei- (H6.28), 1963, J. Lambinon 63/22 (LG); Lompret, derscheid, N of Heischtergronn, near campsite Vallée de l’Eau Blanche, (J4.46), 1985, E. Sérusiaux (K8.32), schistose outcrops along road, 2003, P. & 7075 (LG); . Ard.: , rocher près du château B. van den Boom 30800 (h) (TLC by M. Kukwa). (L6.22), 1868, C.-H. Delogne (BR 3145); Muno, Forêt de Muno, La Roche à l’Appel (L6.34), 2000, This species was known from one locality in E. Sérusiaux (LG). Lorr.: NNW of , SW of northern France (Kukwa & Diederich 2007) Lahage, Le Gros Cron (M7.12), 1998, P. van den and is here reported as new for Luxembourg. Boom 20133 (h); Clairefontaine, gardens around convent (L8.51), 2002, D. Ertz 2659 (BR). Leptogium aragonii Otálora Luxembourg, Ard.: Esch-sur-Sûre (K8.32), 1979, Belgium, Mosan: Bauche (H5.27), 1882, E. Marchal 2000 & 2002, P. Diederich 1528, 14080 & 15424 (h). (BR); environs de Namur (G5.36), rocher calcaire, Lorr.: S Plankenhof (L8.36), 1979, P. Diederich 1457 1894, C.-H. Delogne (BR); Montbliard (J4.23), 1874, (h); E of Mersch, Bënzert, (L8.35), 1999, P. Diederich A. Hardy (BR 1049); Waulsort, left bank of the 13830 (h); NW of Steinfort, (L8.51), 1980 & 1997, P. Meuse, Fond de Naverogne (H5.47), 4.6.1994, sur Diederich 2310, 2625 & 12899 (h); SW of Greven- une paroi verticale calcaire, P. Diederich 4977 (h); macher, Kelsbaach (L9.53), 1981, P. Diederich 3749 S of Namur, Yvoir, S side of village, neglected place (h); between Dudelange and Kayl, Haardt (M8.54), along railway, W-exposed rock-faces (H5.27), 2001, 1981 & 2003, P. Diederich 3320 (h), P. van den Boom P. van den Boom 26390 (h); Falmignoul (H5.57), 30742 (h); W of Kayl, monument des mineurs 2002, on calcareous rock, D. Van den Broeck 482 (h); (M8.53), 2002, P. van den Boom 29878 (h). 2.6 km WSW of Durbuy, halfway and NE of road France, Mar.: Nord, Bray-Dunes, dune du Per- Petite Somme to Petit-Han (H6.18), W exposed, roquet, à 900 m au N de la ferme Petite Mare shaded and sunny, calcareous rock, 1989, P. van den (D0.15), 2002, P. Diederich 15196 (h); Pas-de-Cal- Boom 8226 p.p. (h). Ard.: Bouillon, rochers du châ- ais, Ambleteuse, dunes cotières au S de l’estuaire de teau (L6.22), 1869, C.-H. Delogne (BR). la Slack (E22.35), 1988, E. Sérusiaux 10368 (LG). Otálora et al. (2008) revised the Leptogium See comments under Leptogium aragonii. lichenoides group in Europe. Following that treatment, our previously concept of Leptogium pulvinatum (Hoffm.) Otálora L. lichenoides (Sérusiaux et al. 1999) is con- Selected specimens examined: Belgium (Mar.): firmed, whilst the material called L. gelati- Dunes à Knokke (B2.33), c. 1850, Coemans (BR nosum belongs to three distinct species, L. 1067); Nieuport (C1.41), dunes, 1891, leg. ? (BR);

84 Bull. Soc. Nat. luxemb. 110 (2009) De Panne, Cabour (D0.16), dune, 2008, D. Van men], F. Gravet (BR, in herb. Troch); Neufchâ- den Broeck 2412 (h). Camp.: , De Schans teau (K7.51), on Betula, 1871, leg. ? (BR, in herb. van Smoutakker (B4.46), 2005, D. Van den Broeck Hardy); Bouillon, route Dohan vers Mortehan/ 1611 (h). Mosan: 2 km N of Villers-sur-Lesse, in Cugnon, talus moussu de la route à hauteur de la front of entrance to Chateau Royal (J6.13), 2001, P. Roche de la Saurpîre (L6.24), on Betula, 1991, E. van den Boom 26499 (h); SW of Wavreilles, 1 km Sérusiaux 11055b (LG). ENE of Belvaux, E side of Lesse (J6.34), 2001, P. van Luxembourg, Lorr.: NE of Rumelange (M8.53), den Boom 26569 (h); Dinant, Lisogne, Les Monts on Betula, 2009, P. Diederich 16880 (h). Broquefosse (H5.38), 2002, D. Van den Broeck 483 (h); Montagne aux Buis, Roche à Lomme (J5.41), A revision of the herbarium material of this 2003, D. Van den Broeck 409 (h); NE of Han- non-lichenized species yielded several speci- sur-Lesse, Belvédère (J6.24), 1997, P. Diederich mens from three Belgian localities. It has also 12687 (h); Dinant, vallée de la Leffe, rive droite, recently been collected in a formerly polluted face à l’ancien Moulin de Capele (H5.37), 1982, site in southern Luxembourg, suggesting that E. Sérusiaux 2900 (LG); Olloy-sur-Viroin, tallus rocheux couvinien au bord de la route d’Oignies it might be overlooked. The species has fur- (J5.42), 1962, J. Lambinon 62/2247 (LG). Ard.: S. thermore been reported on Betula from Bel- loc. (probably near Malmedy) (G8.43), c. 1830, gium (Ard., Montenau, H8.15, 1957 [Müller M.-A. Libert (BR 1056); Willerzie (K5.16), 1868, F. (1958: 141]) and France (Fl., Nord, Rexpoëde, Gravet (BR 1066); Mortehan (L6.15), 1882, C.-H. D0.45 [Bouly de Lesdain 1910: 255]; Lorr., Delogne (BR 1041). Lorr.: Torgny, carrière de Bel- Meurthe-et-Moselle, Hussigny-Godbrange, védère (M7.42), 1963, G. Thiry 624 (BR 1069), M. M8.51, 2004, A. Aptroot [Diederich et al. Onraedt 63/1351 (BR 5634); Waltzing, Lingenthal (L7.58), 2003, P. van den Boom 30693 (h); NNW 2006]). Other literature reports on phoro- of Virton, SW of Lahage, Le Gros Cron (M7.12), phytes other than Betula, or without any indi- 1998, P. van den Boom 20133 (h). cation of the phorophyte are dubious. Luxembourg, Ard.: Esch-sur-Sûre, ruines du château-fort (K8.32), 2000, P. Diederich 14080 Leptorhaphis laricis (J. Lahm) M. B. Aguirre (h). Lorr.: N Niederanven, Aarnescht (L8.58), Belgium, Camp.: Wechelderzande, 1.5 km NW of 1985, P. Diederich 6800 (h); Ansembourg, garden village, NE of airstrip (B5.55), on Calluna, small of castle along main road (L8.44), 2005, P. Died- heath sheltered by Pinus wood, 2007, M. Brand erich 16191 (h); Mamer, Thillsmillen, Kielbaach, 56046 (h). Ard.: 1.8 km W of , right shore of (M8.14), 1997, P. Diederich 12860 (h); SE of Semois (L6.37), on Calluna on top of schist out- Grevenmacher, Kelsbaach (L9.53), 1981, P. Die- crop in wooded valley, 1989, M. Brand 22218 (h). derich 3749 (h); NE Rumelange (M8.53), 1985, P. Diederich 6200 (h); Lasauvage, rock in village France, Ard.: Ardenne, 7 km NE of Revin, Fumay, (M7.48), 1999, P. Diederich 13879 (h). Roche de l’Uf (K5.14), on Calluna twigs, small pieces of heath near top of schistose rocks, 1998, France, Mar.: Nord, E of Ghyvelde, fossil dune, M. Brand 37438 (h). (D0.16), 2002, P. Diederich 15176 (h). Pic.: Somme, 6 km NW of Abbeville, Port-le-Grand, (J22.17), 2001, This non-lichenized fungus was known P. Diederich 15382 (h). Mosan: Ardennes, Givet, from Germany on Larix and Genista ger- rive gauche de la Meuse, sous le fort de Charlemont manica (Aguirre-Hudson 1991) and from the (J5.25), 1999, P. Diederich 15665 (h); Givet, ancien Ne­therlands on Calluna and Quercus (Apt- fort de Condé (J5.25), 1982, E. Sérusiaux 4590 (LG). root et al. 2008a). It is here reported as new Lorr.: Moselle, 600 m NNW of Montenach, Kop- penachberg (N9.22), 1999, P. Diederich 13768 (h); for our checklist area. Meurthe-et-Moselle, Charency, entre Longuyon et Montmedy (M7.52), 1989, E. Sérusiaux 10392 (LG). Leptorhaphis maggiana (A. Massal.) Körber See comments under Leptogium aragonii. Belgium, Fl.: Lede, Vallei van de Serskampse Beek (D3.46), on Corylus, 2008, D. Van den Broeck Leptorhaphis epidermidis (Ach.) Th. Fr. 2426 (h); Ieper, Galgenbossen (E1.12), on Cory- lus, 2009, D. Van den Broeck 2756 (h). Camp.: Belgium, Ard.: Louette-Saint-Pierre (K5.27), on Aarschot, Meetshoven (D5.35), on Corylus, 2009, Betula, 1870, G. Aubert (BM, BR; Westendorp, D. Van den Broeck 3015 (h). Herb. Crypt. Belg. exs. 1329 [as Verrucaria epider- midis var. albissima] and 1330 [V. epidermidis]); A rare or overlooked, non-lichenized spe- ibid., F. Gravet (BR, as Verrucaria oxyspora); s. cies that was known from one locality in loc. [but probably same loc. as previous speci- Belgium (Mosan) on Corylus and one in

Bull. Soc. Nat. luxemb. 110 (2009) 85 Fig. 3. Myxophora lepto- giophila, a lichenicolous ascomycete with black, immersed perithecia in the thallus of Collema cris- pum, collected in Luxem- bourg (Lorr.). Scale bar = 200 μm.

Luxembourg (Lorr.) on Carpinus (van den Minutoexcipula tephromelae V. Atienza, Boom et al. 1999). Etayo & Pérez-Ortega Belgium, Ard.: S of St. Vith, Ouren, churchyard Lichenoconium pyxidatae (Oudem.) Petr. (J8.25), vertical surface of grave stone, on Teph- & Syd. romela atra, 2004, P. & B. van den Boom 32277 (h). Belgium, Lorr.: Lischert (L7.36), on a wall in a Luxembourg, Ard.: Bourscheid, castle (K8.34), on a garden, on Cladonia fimbriata, 2001, P. Diederich quartzite wall, on T. atra, 2003, P. Diederich 15624 (h). 15130 (h) & D. Thoen. Netherlands: Prov. Groningen, N of Delfzijl, ENE of Luxembourg, Lorr.: W of Kayl, near ‘Monument Bierum, Hoogwatum, NE exposed dike with gran- des mineurs’ (M8.53), over mosses in a disused ite stones among cement or concrete, on granite, on quarry, on C. pyxidata subsp. pocillum, 2009, P. T. atra, 2000, P. & B. van den Boom 24586 (h). Diederich 16825 (h). This recently described species (Atienza et France, Lorr.: Moselle, Schengen, Stromberg, quarry al. 2009) seems to be confined toTephromela (N9.11), on C. cf. rei, 1981, P. Diederich 12805 (h). atra. It was known from Spain and is here A relatively rare lichenicolous coelomycete newly reported from Belgium, Luxembourg confined to Cladonia species, previously and the Netherlands. known from one locality in Belgium (Séru- siaux et al. 1999) and one in northern France Monodictys epilepraria Kukwa & Diederich (Signoret & Diederich 2000), here reported Luxembourg, Ard.: Hoscheid, Molberlay (K8.24), as new for Luxembourg, and from addi- on Quercus, on Lepraria (host in a poor condi- tional Belgian and French localities. tion), 1987, P. Diederich 16782 (h). Although this species is widespread and Lobaria virens (With.) Laundon common especially in Eastern Europe Belgium, Mosan: vallée de l’Hermeton, rocher (Kukwa & Diederich 2005), it appears to be siliceux ombragé, 1887, A. Tonglet & L. Guelton extremely rare in our study area, from where (BR [81F]); ibid., à la base d’un rocher ombragé, it is here reported as new. 1897, ? (BR, in herb. Troch). This species was known from eight Belgian Myxophora leptogiophila (G. Winter) Nik. localities, all located in the Ardenne district. Hoffm. & Hafellner (Fig. 3) The two old specimens cited above prove Luxembourg (Lorr.): Strassen (M8.14), sur une that the species did also exist in the Meuse pierre en grès, sur Collema crispum, 2009, P. Die- district at the end of the 19th century. derich 16801 (h).

86 Bull. Soc. Nat. luxemb. 110 (2009) This species was reported by Diederich et al. This lichenicolous anamorphic fungus was (1992, as Physalospora leptogiophila) from an mentioned from Belgium (Ard.) by Diederich old specimen collected by J.-B. Reinhard near & Sérusiaux (2000), but no such specimen Echternach before 1850. As no locality is indi- has ever been published or could be located cated, it is not sure, however, if the specimen in any herbarium. The presence in Belgium of was collected in Luxembourg or in Germany. the species is herewith confirmed, based on We here report the first specimen of this spe- several recently collected specimens. cies collected with certainty in our study area. Physcia clementei (Turner) Maas Geest. Parmelina quercina (Willd.) Hale var. quercina Belgium, Mar.: Doel, Prosperdorp, Oude Sluis Belgium, Fl.: Oudenaarde, Berchemweg, along (D4.44), on Populus on dike, grazed by sheep, a road (E2.37), on Quercus, 2008, D. Van den 2006, M. Brand 54555 (h). Fl.: Sint-Laureins, Broeck 2675 (h). Caatsweg (C2.27), on Populus, 2008, obs. D. Van den Broeck; Maldegem, Torredreef (C2.35), on This species was recently rediscovered in Populus, 2008, D. Van den Broeck 2634 (h); Mal- Belgium in the Maritime district (Van den degem, Doornstraat (C2.35), on Quercus, 2007, Broeck 2005, Van den Broeck et al. 2006) D. Van den Broeck 2198 (h); Sint-Gillis-Waas, and is here reported at the first time from Dijkstraat (C4.11), on Populus, 2008, D. Van the Flanders district. den Broeck 2570 (h); Oudenaarde, Berchemweg (E2.37), on Quercus, 2008, obs. D. Van den Broeck. Camp.: Geel, Zeggendijk (C5.38), on Quercus, Phaeosporobolus usneae D. Hawksw. & 2008, D. Van den Broeck 2470 (h); Halen, Holak- Hafellner enstraat (D6.53), on Populus, 2006, D. Van den Belgium, Fl.: Oostkamp, Kortrijksestraat, on old Broeck L P41/2 (h); Westerlo, ‘Rothoek’ (D5.17), Quercus along road (C2.51), on Ramalina farina- on Salix, 2007, J. Poeck s. n. (h). cea, 2008, D. Van den Broeck 2729 (h). Lorr.: W The last collection of this macrolichen from of , NW of Chantemelle, 1 km S of Sivry our area of study dated back to 1954, but the (L7.54), on Betula, on Usnea filipendula, 1985, species was recently rediscovered in the Mari- P. van den Boom 2331 (h); Lahage, Croix Rouge (M7.12), on Evernia prunastri, 1956, E. Jacques time, Campine and Meuse districts (van den 2277 (BR); Arlon, domaine militaire de Lagland, Boom & van den Boom 2006). The new find- flanc SW de la ‘Montagne de Stockem’ (L7.56), on ings show that the species is more common Pinus sylvestris, on Pseudevernia furfuracea, 2003, than previously expected in western Belgium, P. Diederich 15811 (h). and that it may be spreading rapidly.

Fig. 4. Telogalla olivieri, a lichenicolous asco- mycete with minuscule, black, entirely immersed perithecia, inducing the formation of characteristic galls on the thallus of Xan- thoria parietina, collected in Belgium (Mosan). Scale bar = 1 mm.

Bull. Soc. Nat. luxemb. 110 (2009) 87 Phoma grumantiana Zhurb. & Diederich Ramalina lacera (With.) J.R. Laundon Luxembourg, Lorr.: W of Kayl, monument des Belgium, Fl.: Ieper, Noorderring (E1.14), on mineurs (M8.53), abandoned old quarry, verti- Populus, 2008, D. Van den Broeck 2484 (h). cal wall, on Cladonia pyxidata subsp. pocillum Ramalina lacera was reported several times (infected parts of thallus bleached), 2002, P. & B. in Belgium near Koksijde after 1900. No van den Boom 29864 (h). herbarium specimen appears to exist, but a This species was known from Svalbard and stereophoto has been published by Massart the U.S.A., on the thallus of Cladonia mathe- (1910: photo 281) and reproduced by Diede- ocyatha and C. symphycarpia (Diederich et rich & Sérusiaux (2000: 13). Fertile material al. 2007). It is new for our study area. has also been discovered near Furnes in 1954 (Barkman 1990: 14). In northern France, the Polyblastia gothica Th. Fr. species is known from many older records Luxembourg, Lorr.: Au SW de Grevenmacher, (see distribution map in Sérusiaux et al. Kelsbaach (L9.53), sur terre, mélangé avec Lep- 2004), the most recent being from 1973 togium pulvinatum, 1981, P. Diederich 16785 (h). (Sparrius et al. 2002). The species was subse- This is an extremely rare, terricolous or mus- quently considered as extinct in our region. cicolous lichen species, previously known Recently, several populations of Ramalina cf. from Scotland (Orange et al. 2009), Sweden lacera were discovered in Flanders and north- and Norway (Santesson et al. 2004), Austria ern France. Examination by thin-layer chro- (van den Boom et al. 1996b), North America matography revealed that the material is not (Esslinger 2009), and the Antarctic (South homogeneous and that it belongs to two dis- Shetland Is.) (Øvstedal & Lewis Smith 2001). tinct species: four Belgian specimens (D. Van The Luxembourg specimen is extremely den Broeck 2583, 2619, 2658 and 2920) con- reduced, but typical. The species is new for tain divaricatic acid and belong to R. canar- our study area. iensis. One Belgian specimen (D. Van den Broeck 2484) contains bourgeanic acid and Pyrenula chlorospila Arnold belongs to R. lacera. Ramalina lacera has also Belgium, Mosan: Dinant, between Falmignoul recently been reported from Knokke (B Mar.) and Anseremme, Meuse valley, between Rochers (Van den Broeck et al. 2006), but no specimen de Freyr and Trou de la Jeunesse (H5.57), on was collected. A recent French collection (D. Fraxinus, 2009, D. Van den Broeck 3275 (h). Van den Broeck 1066) has not been examined This is a remarkable rediscovery of a species by TLC, but its morphology is typically that that was considered as extinct in Belgium of R. canariensis. All older records of R. lacera after 1868. The species is not rare in north- will have to be critically re-examined if her- ern France (Boulonnais). barium material can be found.

Ramalina canariensis Steiner Sphaerellothecium cladoniae (Alstrup & Zhurb.) Hafellner Belgium, Fl.: Wingene, Sint-Pietersveldstraat (D2.13), on Populus, 2008, D. Van den Broeck Luxembourg, Lorr.: W of Kayl, Monument 2658 (h); Petegem (Wortegem-Petegem), De des mineurs (M8.53), over mosses in a disused Langemeersen, nature reserve (E2.38), on Populus, quarry, on Cladonia pyxidata subsp. pocillum, 2009, P. Diederich 16824 (h); E of Rodange, NE 2009, D. Van den Broeck 2920 (h). Camp.: Bree, edge of Tëtelbierg, open place along path with Soerdijkstraat (C7.34), on Quercus, 2008, D. young Betula and Salix trees (M8.31), terricolous, Van den Broeck 2619 (h). Brab.: Vilvoorde, Otto on C. pyxidata subsp. pocillum, 2003, P. van den Dementockdreef (D4.57), on Populus, 2008, D. Boom 30677 p.p. (h). Van den Broeck 2583 (h). France, Boul.: Pas-de-Calais, Audinghen, bois This is a very common and widespread, but d’Haringzelle (E22.25), on Fraxinus, 2009, D. Van much overlooked lichenicolous pyrenomyc- den Broeck 1066 (h). ete, forming a dark, superficial, reticulate myc- elium over the thalli of Cladonia species, over This macrolichen is new for our study area. which minuscule, blackish perithecia develop See comments under R. lacera. (Zhurbenko 2004). It is new for our study area.

88 Bull. Soc. Nat. luxemb. 110 (2009) Telogalla olivieri (Vouaux) Nik. Hoffm. & This species was reported from Belgium Hafellner (Fig. 4) by Sérusiaux et al. (1999), but Sérusiaux et Belgium, Mosan: Couvin, carrière du nord al. (2003) eventually stated that the mate- (J4.48), on Xanthoria parietina, 2008, D. Van den rial merely represents the more common Broeck 2696 (h). V. lichenicola (Linds.) Petr. & Syd. with ver- This species was known in our study area rulose conidia. With this new specimen, the from an old Luxembourg specimen without species can therefore definitely be added to known locality (Sérusiaux et al. 1999). It is the checklist of Belgium, Luxembourg and here reported as new for Belgium. northern France.

Tubeufia heterodermiae Etayo Acknowledgments Luxembourg, Lorr.: Hellange, Bëltzacker Weiher We warmly thank Martin Kukwa for identifying (M8.56), on Salix, on Physcia tenella, 2009, G. two Lepraria specimens and for detecting Mono- Marson (herb. Diederich). dictys epilepraria within Lepraria herbarium This species has recently been published material, Guy Marson for communicating us his from Belgium (van den Boom & van den collection of Tubeufia heterodermiae, Jacqueline Boom 2006) and is here reported as new for Poeck for allowing us to publish her specimen Luxembourg. of Physcia clementei, Othmar Breuss for kindly confirming the identity of Polyblastia gothica, Usnea flammea Stirton after examination of microscopical photos of our specimen, André Aptroot for sending us several Belgium, Ard.: ‘Rochers près Sougnez et Grand specimens on loan, Francine Demuylder for help Duché de Luxembourg’ (G7.36), c. 1850, leg. ? with TLC, and Claude Roux for interesting dis- (LG, in herb. Morren, sub Alectoria sarmentosa cussions on some critical species. Ach. Usnea dichotoma Hoffm.) (probably col- lected by Charles Morren 1807-58 or Edouard Morren 1833-86). References This almost certainly refers to the village Aguirre-Hudson, B., 1991. A taxonomic study of Sougné in Belgium near Remouchamps, as the species referred to the ascomycete genus there is no locality with a similar name in Lux- Leptorhaphis. Bulletin of the British Museum (Natural History), Botany 21: 85-192. embourg. The specimen contains stictic, men- egazziaic and lobaric acids (TLC). The species Aptroot, A. & N. J. Stapper, 2008. Flechten im was previously known from a single specimen Nationalpark Eifel und in den angrenzenden Ardennen - ein Exkursionsbericht. Akt. in the study area, without known locality, but Lichenol. Mitt. NF 15: 14-42. almost certainly collected by F.-A. Tinant in Luxembourg (Lorr.) around 1840 (Sérusiaux Aptroot, A., M. Brand, K. van Herk & L. Sparrius, 2008a. Veranderingen in de checklist van de et al. 1999). The species is new for Belgium. Nederlandse korstmossen en korstmospara- sieten. Buxbaumiella 82: 6-13. Verrucaria hegetschweileri Körb. Aptroot, A. L. Spier & D. Jordaens, 2008b. Parmo- Luxembourg, Lorr.: W of Berdorf, along road to trema pseudoreticulatum: de verbeterde deter- Grundhof, Vugelsmillen, near bridge of Haller- minatie van Parmotrema stuppeum (Gewim- bach (L9.11), at the shaded base of Alnus, 2009, P. perd schildmos). Buxbaumiella 80: 9-12. & B. van den Boom 43417 (h). Arup, U., 2006. A new taxonomy of the Caloplaca This rare species was known from a collec- citrina group in the Nordic countries, except tion on the base of Acer pseudoplatanus in Iceland. Lichenologist 38: 1-20. Belgium (Ard.) (Sérusiaux et al. 2003). It is Arup, U., 2009. The Caloplaca holocarpa group new for Luxembourg. in the Nordic countries, except Iceland. Lichenologist 41: 111-130. Vouauxiella verrucosa Petr. & Syd. Arup, U. & E. Åkelius, 2009. A taxonomic revi- Belgium, Camp.: Westerlo, Abdij van Tongerlo sion of Caloplaca herbidella and C. furfura- (C5.57), on an old brick wall, on Lecanora camp- cea. Lichenologist 41: 465–480. estris, 2008, D. Van den Broeck 2589 (h, herb. Die- Atienza, V., S. Pérez-Ortega & J. Etayo, 2009. Two derich). new conidial lichenicolous fungi from Spain

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90 Bull. Soc. Nat. luxemb. 110 (2009) O. Breuss, A. Orange, L. Fröberg, A. Amtoft Nelsen, M.P., H.T. Lumbsch, R. Lücking & J.A. Wynns, P. Navarro-Rosinés, B. Krzewicka, J. Elix, 2008. Further evidence for the polyphyly Pykälä, M. Grube & F. Lutzoni, 2009. Generic of Lepraria (: Stereocaulaceae). classification of the Verrucariaceae (Ascomy- Nova Hedwigia 87: 361-371. cota) based on molecular and morphologi- Orange, A., O. W. Purvis & P. W. James, 2009. cal evidence: recent progress and remaining Polyblastia A. Massal (1852). In: Smith, C.W., challenges. Taxon 58: 184–208. A. Aptroot, B. J. Coppins, A. Fletcher, O. L. Hafellner, J., 2009. Phacothecium resurrected and Gilbert, P. W. James & P. A. Wolseley (eds.). the new genus Phacographa (Arthoniales) The lichens of Great Britain and Ireland, Brit- proposed. Bibl. Lichenol. 100: 85-121. ish Lichen Society, London: 722-727. Hafellner, J., G. Herzog & H. Mayrhofer, 2008. Otálora, M. A. G., I. Martínez, C. M. Molina, Zur Diversität von lichenisierten und licheni- G. Aragón & F. Lutzoni, 2008. Phylogenetic colen Pilzen in den Ennstaler Alpen (Öster- relationships and taxonomy of the Leptogium reich: Steiermark, Oberösterreich). Mitt. lichenoides group (Collemataceae, Ascomy- Naturwiss. Ver. Steiermark 137: 131-204. cota) in Europe. Taxon 57: 907-921. Harris, R. C., 2009. Four novel lichen taxa in the Øvstedal, D. O. & R. I. Lewis Smith, 2001. Lichens lichen biota of eastern North America. Op. of Antarctica and South Georgia: a guide to Philolich. 6: 149-156. their identification and ecology. Studies in Hellemans, K., 2008. Beheerseenheid OOY Polar Research, Cambridge University Press, van het natuurgebied Buitengoor in Mol Cambridge, England, 411 pp. een bijzonder ecotoop voor korstmossen Purvis, O. W., B. J. Coppins, D. L. Hawksworth, (lichenen.). Muscillanea 27: 9-14. P. W. James & D. M. Moore, 1992. The lichen Jørgensen, P. M. & J. Motiejūnaitė, 2005. Lem- flora of Great Britain and Ireland. Natu- mopsis pelodes found in Lithuania. Graphis ral History Museum Publications & British Scripta 17: 17–19. Lichen Society, London, 710 pp. Kaschik, M., 2006. Taxonomic studies on saxicolous Roux, C., 2009. Naetrocymbe saxicola, likeno kun species of the genus Rinodina (lichenized asco- Trentepohlia. Bull. Soc. linn. Provence 60: 127- mycetes, Physciaceae) in the Southern Hemi- 142. sphere with special emphasis in Australia and Roux C., M. Boulanger & N. Malle, 2009. Calo- New Zealand. Bibl. Lichenol. 93: 1-162. placa itiana sp. nov., espèce nouvelle de Killmann D. & Fischer E., 2008. Bemerkenswerte lichen du littoral de la Manche (France). Bull. Flechtenfunde aus Rheinland-Pfalz und Lux- Ass. fr. Lichénologie 34: 1-10. embourg. Decheniana 161: 29-32. Rouxhet S., E. Sérusiaux & J. Clesse, 2008. Kuborn, F. & P. Diederich, 2008. Die silicolen L’intérêt botanique des anciennes exploita- Flechten im Naturpark Obersauer (Luxem- tions de phyllades ardoisiers de Vielsalm. In burg). Bull. Soc. Nat. luxemb. 109: 17-34. Goemaere E. (ed.), Ardoise et Coticule en Kukwa, M. & P. Diederich, 2005. Monodictys Terre de Salm. Des Pierres et des Hommes. epilepraria, a new species of lichenicolous Institut Royal des Sciences Naturelles de hyphomycetes on Lepraria. Lichenologist 37: Belgique, Service Géologique de Belgique, 217-220. coll. Geosciences, pp. 275-283. Kukwa, M. & P. Diederich, 2007. New records Saag, L., A. Saag & T. Randlane, 2009. World survey of leprarioid lichens from Luxembourg and of the genus Lepraria (Stereocaulaceae, lichen- France, with the first report of fertileLecanora ized Ascomycota). Lichenologist 41: 25-60. rouxii. Bull. Soc. Nat. luxemb. 108: 15-19. Santesson, R., R. Moberg, A. Nordin, T. Tøns- Kukwa, M. & A. Flakus, 2009. Lepraria glau- berg & O. Vitikainen, 2004. Lichen-forming cosorediata sp. nov. (Stereocaulaceae, lichen- and Lichenicolous Fungi of Fennoscandia. ized Ascomycota) and other interesting Museum of Evolution, Uppsala University, records of Lepraria. Mycotaxon 108: 353-364. Uppsala, Sweden, 359 pp. Laundon, J. R., 2003. Six lichens of the Lecanora Sérusiaux, E., 1989. Liste rouge des macrolichens varia group. Nova Hedwigia 76: 83-111. dans la Communauté Européenne. Univer- Massart, J., 1910. Esquisse de la géographie botanique sité de Liège, Dép. de Botanique. de la Belgique, 2 vol. H. Lamertin, Bruxelles. Sérusiaux, E., P. Diederich, M. Brand & P. van den Müller, T., 1958. Über die Flechtenflora des Kan- Boom, 1999. New or interesting lichens and tons Malmedy. Bull. Jard. Bot. Etat Bruxelles lichenicolous fungi from Belgium and Lux- 28: 129-159. embourg. VIII. Lejeunia n. S. 162: 1-95.

Bull. Soc. Nat. luxemb. 110 (2009) 91 Sérusiaux, E., P. Diederich, D. Ertz & P. van Den van den Boom, P., E. Sérusiaux, P. Diederich, Boom, 2003. New or interesting lichens and M. Brand, A. Aptroot & L. Spier, 1999. A lichenicolous fungi from Belgium, Luxem- lichenological excursion in May 1997 near bourg and northern France. IX. Lejeunia n. Han-sur-Lesse and Saint-Hubert, with notes S. 173: 1-48. on rare or critical taxa of the flora of Belgium Sérusiaux, E., P. Diederich & J. Lambinon, 2004. and Luxembourg. Lejeunia n. S. 158: 1-58. Les macrolichens de Belgique, du Luxem- Van den Broeck, D., 2005. Zeldzame lichenen uit bourg et du nord de la France. Clés de déter- de groep van de in Vlaanderen. mination. Ferrantia 40: 1-188. Dumortiera 84: 26-27. Signoret, J. & P. Diederich, 2000. Intérêt de la Van den Broeck, D., 2008. De lichenen van het biodiversité des champignons lichénisés et kerkhof van Dieweg te Ukkel (Brussels Hoofd- lichénicoles pour la gestion conservatoire stedelijk Gewest). Verslag van de VWBL- d’une Réserve Naturelle: la R.N. de Montenach excursie op 5 juli 2008. Muscillanea 28: 31-35. (France, Lorraine). Lejeunia N. S. 163: 1-11. Van den Broeck, D. & P. Hantson, 2008. Verslag van Smith, C.W., A. Aptroot, B. J. Coppins, A. Fletcher, de excursies met de VWBL naar Roeselare op 5 O. L. Gilbert, P. W. James & P. A. Wolseley, 2009. The lichens of Great Britain and Ireland. januari en 26 april 2008. Muscillanea 28: 24-30. British Lichen Society, London, 1046 pp. Van den Broeck, D., A. Aptroot & D. Jordaens, 2006. Sparrius, L. B., P. Diederich, J. Signoret & E. Séru- Een lichenologisch verslag van het voorjaars- siaux, 2002. The lichen flora of the Boulon- weekend 2006 naar Zeeuws-Vlaanderen en nais (France, Pas-de-Calais). Belg. Journ. Bot aangrenzend België. Buxbaumiella 75: 16-25. 135: 50-75. Van den Broeck, D., D. De Beer & H. Stieperaere, Thüs, H. & M. Schutz (2008 [‘2009’]). 2008a. De lichenen en de mossen van de Süβwasserflora von Mitteleuropa, Bd 21/1: VWBL-excursie naar het domein Ter Rijst in Fungi, 1. Teil: Lichens. Spektrum Akademi- Vlaams-Brabant (7 april 2007). Muscillanea scher Verlag, Heidelberg, 223 pp. 28: 4-11. van den Boom , P. P. G. & A. M. Brand, 2008a. Van den Broeck, D., D. Jordaens, L. Sparrius, L. Some new Lecanora species from west- Spier & A. Aptroot, 2008b. Nieuwe lichenen ern and central Europe, belonging to the L. en lichenicole fungi uit Vlaanderen. Dumor- saligna group, with notes on related species. tiera 95: 8-14. Lichenologist 40: 465-497. Van den Broeck, D., L. Spier & D. Ertz, 2008c. van den Boom , P. P. G. & A. M. Brand, 2008b. Verslag van de internationale korstmossen- New records of lichens, lichenicolous and driedaagse in en rond het Zoniënwoud, 1-3 allied fungi from Belgium and the Nether- juni 2007. Muscillanea 27: 25-37. lands. Sauteria 15: 95-101. Van den Broeck D., A. Aptroot, D. Jordaens & L. van den Boom P. & B. van den Boom, 2006. An Spier, 2009. Korstmossen in de Boulonnais inventory of lichens and lichenicolous fungi (Frankrijk, Pas-de-Calais). Buxbaumiella 84: in northern Belgium (area of Stramprooi- 13-31. erbroek). Bull. Soc. Nat. luxemb. 106: 39-52. Wedin, M., M. Westberg, A. T. Crewe, A. Tehler & van den Boom, P., P. Diederich & E. Sérusiaux, O. W. Purvis, 2009. Species delimitation and 1996a. Lichens et champignons lichénicoles evolution of metal bioaccumulation in the nouveaux ou intéressants pour la flore de la lichenized Acarospora smaragdula (Ascomy- Belgique et des régions voisines. VII. Bull. cota, Fungi) complex. Cladistics 25: 161-172. Soc. Nat. Luxemb. 97: 81-92. van den Boom, P. P. G., O. Breuss, L. Spier & Wirth, V., 1995. Die Flechten Baden-Württem- A. M. Brand, 1996b. Beitrag zur Flechten- bergs, Teil 1 & 2. Eugen Ulmer GmbH & Co., flora Kärntens Ergebnisse der Feldtagung Stuttgart, 1006 pp. der Bryologischen und Lichenologischen Zhurbenko, M. P. & V. Alstrup, 2004. Licheni- Arbeitsgruppe der KNNV in Weissbriach colous fungi on Cladonia mainly from the 1994. Linzer biol. Beitr. 28: 619-654. Arctic. Symb. Bot. Upsal. 34: 477-499.

92 Bull. Soc. Nat. luxemb. 110 (2009)