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(Gastropoda Pulmonata: Streptaxidae ). Bulletin De L'jnstitut Royal Des Sciences Natureli Es De Belgique, Biologie, 64: 71-97

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(Gastropoda Pulmonata: Streptaxidae ). Bulletin De L'jnstitut Royal Des Sciences Natureli Es De Belgique, Biologie, 64: 71-97 BULLETIN DE L'INSTITUT ROYAL DES SCIENCES NATURELLES DE BELGIQUE, BIO LOG! E, 67: 5 ~ 30 , 1997 BULLETIN VAN HET KONINKLIJK BELGISCH INSTITU UT VOOR NATUURWETENSCHAPP EN, BIOLOGIE, 67: 5-30, 1997 Dr William ADAM's iconography of Central and West African Gulella species (Gastropoda Pulmonata: Streptaxidae). Part 1 : nominal taxa by A.C. VAN BRUGGEN & J.L. VAN GOETHEM Contents Parks of Congo, identified by Dr ADAM) is shown to be more extensive than originally known. Gulella excruciata CONNOLLY, Abstract 5 1931 , is considered a synonym of Ennea decussatula PRESTON, Resume 5 1913. The following nominal taxa are illustrated (in seven cases Introduction 6 by type material, indicated by an *) and treated: Gulella arthur!*, Abbreviations used 6 G. avakubiensis, G. bistriplicina, G. brevis, G. camerani, G. cara, The genus Gulel/a L. PFEIFFER, 1856 6 G. chapini, G. coarti, G. conospira, G. decussatula, G. dissem­ Review of the species illustrated 8 inata*, G. haullevillei, G. lamyi*, G. lessensis, G. masisiensis, G. Gulella arthur! (DAUTZENBERG, 1890) 8 mikenoensis*, G. opoboensis*, G. osborn!, G. planidens, G. pollone­ G. avakubiensis PI LSB RY, 19 19 9 riana*, G. pupa, G. sanA:uruensis*, G. se.;r:dentata, G. socialis, G. G. bistriplicina PILSBRY, 1919 9 ugandensis, and G. vicina mecliafricana. The following subspecies G. brevis (THI ELE, 1911) I 0 and/or varieties are synonymous with their respective nominal G. camerani (POLLONERA, 1906) II species: G. conospira polynematica, G. masisiensis pafatidens G. cara PILSBRY, 1919 12 and G. opoboensis liberiana. Attention is drawn to summary G. chapin! PI LSBRY, 191 9 12 radula data for G. decussatula and G. lessensis. Gu/ella bemardi G. coarti (DAUTZENBERG & GERMAIN, 1914) 13 is proposed as nom. nov. for Gufelfa sexdentata (TAYLOR, 1880) G. conospira (YON MARTENS, 1892) 13 non Gu!ella sexdentata (VON MARTENS, 1869). G. decussatula (PR ESTON, 1913) 14 G. disseminata (PRESTON, 1913) 16 Key-words: Gastropoda, Pulmonata, Streptaxidae, Gulella, Africa, G. haullevillei (DAUTZENBERG & GERMAIN, 1914) 16 systematics. G. lamyi (DAUTZENBERG & GERMAIN, 1914) 16 G. lessensis PI LSBRY, 19 19 17 G. masisiensis PILSBRY, 19 19 19 Resume G. mikenoensis (PRESTON, 19 13) 20 G. opoboensis (PRESTON, 1914) 20 L' iconographie d' especes du genre Gulefla (Gastropoda G. osborn! PILSBRY, 1919 2 1 Pulmonata: Streptaxidae) provenant d 'Afrique centrale et G. planidens (voN MARTENS, 1892 21 occidentale, laissee par le Dr William ADAM. Jere Partie; taxons G. polloneriana PILSBRY, 19 19 22 nominaux. G. pupa (THIELE, 19 11 ) 23 I..: heritage scientifique du Dr William ADAM ( 1909- 1988) contient G. sankuruensis DARTEVELLE-PUISSANT, 1936 24 entre autres une serie de dessins de coquilles appartenant au G. sexdentata (voN MARTENS, 1869) 24 genre Gulella (famille des Streptaxidae), Ia plupart sans notes G. socialis PI LSBRY, 1919 25 manuscrites. Vu Ia tres haute qualite des dessins, realises par G. ugandensis (S MITH , 190 I) 26 Mme J. VAN MELDEREN-SERGYSELS, il est exclu d'archiver ces G. vic ina mediafricana PILSBRY, 19 19 27 documents sans les valoriser. Les auteurs presentent des donnees Acknowledgements 27 succinctes sur 26 taxons nominaux du genre Gulella, de I' Afrique References cited 27 centrale et occidentale. Pour nombre d'entre eux, Ia repartition geographique (basee principalement sur du materiel des Pares Nationaux du Congo, identifie par le Dr ADAM) se revele Abstract nettement plus large que connue. Gu/el/a excruciata CONNOLLY, 193 1 est considere comme un synonyme d' Ennea decussatula When Dr William ADAM (1909-1988) died, he left a number of PRESTON, 19 13. Les taxons nominaux suivants sont traites et figures of shells of the genus Gulella (family Streptaxidae) with illustres pour sept cas par leur materiel type, indique par un *); no, or only minimal, manuscript notes. The high quality of the Gulella arthuri*, G. avakubiensis, G. bistriplicina, G. brevis, fi gures, drawn by Mrs. J. VAN MELDEREN-SERGYSELS, precluded G. camerani, G. cara, G. chapin!, G. coarti, G. conospira, G. decus­ storage in the Institute archives without further comment. The satula, G. disseminata*, G. haullevillei, G. lamyi*, G. lessensis, present authors have supplied summary notes on the 26 Central G. masisiensis, , G. mikenoensis*, G. opoboensis*. G. osborni, and West African nominal taxa depicted; the distribution of G. planidens, G. polfoneriana*, G. pupa, G. sankuruensis*, many of these taxa (mainly based on materi al from the National G. sexdentata, G. socialis, G. ugandensis et G. vicina media- 6 A.C. VAN BRUGGEN & J.L. VAN GOETHEM '' ji"icana. Les sous-especes et/ou varietes suivantes sont synonymes MCZ Museum of Comparative Zoology, Harvard de leurs especes nominales respectives: G. conospira polyne­ University, Cambridge, Mass., U.S.A. matica, G. masisiensis palatidens et G. opoboensis liberiana. Des MRAC Musee royal de I' Afrique centrale, Tervuren, donnees succinctes des radules sont presentees pour G. decus­ Belgium satula et G. lessensis. Gulel/a bernardi nom . nov. est propose NM Natal Museum, Pietermaritzburg, South Africa pour Gulella sexdentata (TAYLOR, 1880) non Gut ella sexdentata NRS Naturhistoriska Riksmuseet, Stockholm (VON M ART E S, 1869). RMNH Nationaal Natuurhistorisch Museum (formerly Rijksmuseum van Nat.uurlijke Historie), Mots-clefs: Gastropoda, Pulmonata, Streptaxidae, Gu lella, Afrique, systematique. Leiden, the Netherlands SAM South African Museum, Cape Town Introduction Geography D.R.Congo Democratic Republic of Congo (formerly When Dr William ADAM ( 1909-1988), late curator of Za'ire) molluscs of the Royal Belgian Institute of Natural Sciences ex The addition of 'ex:' to a national park acronym (Brussels), died, he left a considerable and valuable (e.g. ex PNV) indicates a locality in the area heritage of manuscripts, manuscript notes and figures. immediately adjoining the national park in Most of the figures were intended to be illustrations for question. a number of papers on African terrestrial molluscs in PNG Garamba National Park, D.R.Congo various stages of planning, three of which have now been PNU Upemba National Park, D.R.Congo published (vide ADAM, VAN BRUGGEN & VAN GOETH EM, PNV Virunga National Park [formerly Albert 1993, 1994, 1995). No more reasonably complete or even National Park, officially divided into three somewhat advanced manuscripts on this subject were sectors, i.e. the northern (north of Lake found among Dr ADAM's papers. However, there is a series Edward), central (around and south of Lake of figures of shell s of a number of mainly Central and Edward), and southern (from the Rutshuru West African species of the large genus Gulella River to Lake Kivu) sectors], D.R.Congo. L. PFEIFFER, 1856, drawn by Mrs Jacqueline VAN MELDERE N-SERGYSELS, the artist who for many years Shell closely cooperated with Dr ADAM. This series of drawings, ale. specimens in alcohol many of which were made more than forty years ago, ap. aperture may be divided into two parts, viz. (I) figures of identified 1/d the ratio length/major diameter as an indication nominal taxa, and (2) f igures of as yet undescribed taxa. of the shape of the shell. (In a number of The quality of the drawings and their informative value cases the 1/d has been calculated from precluded simple storage without further ado in the micrometer readings, so that the 1/d values do archives of the Brussels Institute. We owe it to the memory not always agree with those calculated from of the late Dr ADAM and to honour the talent and diligence the dimensions in mm.) of Mrs VAN M ELD ERE N-SERGYS ELS to foster publication lw. last whorl (body whorl) in front view of these drawings. wh . number of whorls This paper features the figures of identified nominal taxa. The drawings are accompani ed by notes, some of which (viz. those on G. decussatula and G. lessens is) are extracted The genus Gulella L. PFEIFFER, 1856 from, sometimes meagre, manuscript notes by Dr ADAM, who was in the process of building up a data base on As regards taxonomy, a note of warning may be sounded. the genus Gulella. Unfortunately this was too little In general the system of ZILCH (1960) has been followed advanced to be suitable for publication. Therefore, most and where appropriate his 'subgenera' of Gulella have of the data below was generated de novo, which implies been quoted. This does not imply acceptance of these that treatment of the various taxa is uneven - some taxa as systematic units. Some characteristic species are problems have been solved, others have been indicated. easily classified with some of the more aberrant ' subgenera', but in practice it appears that there are all sorts of intermediates and a definitive classification has Abbreviations used to await incorporation of anatomical (and perhaps also other) characters. At the moment it is even almost impos­ Museums sible to properly delineate Gulella as a genus. PILSBRY AMNH American Museum of Natural History, New (1919: 180, 214) defines the genus as streptaxids with York more or less pupoid shells with reflected peristome in BM The Natural History Museum [formerly British the adult and the aperture usually toothed, but without Museum (Natural History)], London deeply entering palatal folds and no spiral furrows on IRSNB Institut royal des Sciences naturelles de the back. ZILCH ( 1960: 569) gives the following charac­ Belgique, Brussels terization (translated from the German): ' Shell transparent, Iconography of Central and West African Gulella species 7 1 elongate-ovate to ovate-cylindrical; numerous, slowly labrum, i. e. around the normally very narrow umbilicus. increasing, weakly convex whorls, with oblique axial The sutures are also part of the surface sculpture; these costulation to almost smooth; body whorl rounded below, vary from filiform to (sub)crenellate. rimate; aperture somewhat irregularly circular to ovate, ( 4) Apertural dentition. Some taxa are edentate, i.e. have circular-triangular or quadrate; labrum expanded and no traces of apertural dentition in the adult shell.
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