A Revision of the Genus Luzea (Coleoptera, Staphylinidae, Paederinae)
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Dtsch. Entomol. Z. 57 (1) 2010, 117–135 / DOI 10.1002/mmnd.201000011 A revision of the genus Luzea (Coleoptera, Staphylinidae, Paederinae) Volker Assing* Gabelsbergerstr. 2, 30163 Hannover, Germany Abstract Received 20 July 2009 The genus Luzea Blackwelder, 1912 of the subtribe Medonina is revised. Eight species Accepted 21. September 2009 are recognised, among them L. shavrini sp. n. from Iran and L. schuelkei sp. n. from Published 25 May 2010 Yemen. The distribution of the genus is confined to the Western Palaearctic region and Middle Asia. (Re-)descriptions or diagnoses and illustrations of the external and male Key Words sexual characters of all species are provided. The following synonymies are proposed: Luzea nigritula (Erichson, 1840) ¼ L. marocana Coiffait 1985, syn. n.; L. infirma Medonina (Erichson, 1840) ¼ L. caucasica (Luze, 1912), syn. n., ¼ L. vulpina (Koch, 1938), Palaearctic region syn. n., ¼ L. deserticola Coiffait, 1984, syn. n. Luzea rossica (Bernhauer, 1908) and Taxonomy L. graeca (Kraatz, 1857) are revalidated. Lectotypes are designated for Lithocharis New species nigritula Erichson, 1840 and Medon vulpinus Koch, 1938. A key to species and a cata- New synonymies logue are provided. The distributions of the genus as a whole and of the individual Revalidations species are mapped. Numerous new country records are reported. Lectotype designations Zoogeography Catalogue Key to species Introduction and taxonomic history dated key, Coiffait (1984) recognised seven species, in- cluding the five species previously attributed to Luzea, Luze (1912) described the subgenus Micromedon as a one species, L. rossica (Bernhauer), transferred from subgenus of Medon Stephens, 1833 to accommodate Medon and one new species, L. deserticola. He listed the type species by monotypy, Medon caucasicus Luze, Luzea cephalica (Eppelsheim), which had previously 1912. This subgenus was listed neither by Bernhauer & been treated as a synonym of L. nigritula, as a variety Schubert (1912) nor by Scheerpeltz (1933). Black- of L. nigritula. Remarkably, he did not consider – or welder (1952) recognised the homonymy of Microme- accept – the placement of Scopaeus infirmus Erichson don Luze with Micromedon Casey, 1905 and replaced in Luzea, which was proposed by Jarrige (1960). An the former with the new name Luzea. additional new species, L. marocana, was described by Coiffait (1961a) elevated several previous subgenera Coiffait (1985). of Medon, among them Luzea, to generic rank. In the Gusarov (1995) examined the type material of sev- same year, he provided a key to the four Luzea species eral Luzea species, synonymised L. deserticola with known to him at the time (L. nigritula (Erichson), L. caucasica, and L. rossica with L. cephalica, and tre- L. graeca (Kraatz), L. caucasica (Luze), L. vulpina ated the latter as a distinct species. (Koch)), stating that the genus was closely allied to Based on an examination of the type material of Sco- Pseudomedon Mulsant & Rey, 1878, but distinguished paeus infirmus, Frisch (1999) found that Jarrige’s by the narrower gula and particularly by the character- (1960) interpretation of this species was correct and istic morphology of the aedeagus (Coiffait 1961b). moved it to Luzea. Based on a study of type material, Bordoni (1980) In the recent Palearctic Catalogue, Smetana (2004) listed transferred Medon lutrellus Fauvel to Luzea. In an up- eight valid species and twelve synonyms. Since then, only * E-mail: [email protected] # 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim 118 Assing, V.: Revision of Luzea (Coleoptera, Staphylinidae) two taxonomic changes have been proposed: Assing (2006) nius. Gular sutures narrowly separated. For illustrations synonymised L. graeca with L. nigritula, and Assing of the mouthparts see Coiffait (1984). (2008a) added another synonym of L. nigritula from Hypo- Small species, body length 2.5–4.2 mm. Coloration medon, so that, prior to the present revision, the genus in- variable, yellowish to blackish. Punctation of forebody cluded seven valid species and fourteen synonyms. highly variable, extremely fine and dense to moderately The present revision was originally initiated by mate- coarse and moderately sparse. Length of elytra and hind rial of an unidentified species from Ukraine forwarded wings often di- or polymorphic. Protarsi not dilated. to me by Andrej Gontarenko. An examination of these Metatarsomere I longer than II, but shorter than the specimens revealed that they were conspecific neither combined length of II and III. with material previously identified as L. caucasica nor <: sternite VII not distinctly modified; posterior mar- with any other of the valid species. In order to clarify gin of sternite VIII broadly, weakly to moderately con- the identity of the Ukrainian material, the types of all cave (e.g., Figs 6, 16), not triangularly excised in the the valid names and relevant synonyms were revised. middle; aedeagus of characteristic, derived morphology: basal part weakly sclerotised; ventral process rather stout at base, gradually tapering apicad, distinctly Material and methods curved to almost angled in lateral view; internal sac with pair of massive, strongly sclerotised, somewhat The material referred to in this study is deposited in the following ear-shaped latero-apical structures distinctly projecting public institutions and private collections: beyond apex of ventral process, these latero-apical BMNH The Natural History Museum, London (R. Booth) structures usually somewhat concealing apex of ventral HNHM Hungarian Natural History Museum, Budapest process in lateral view (e.g., Figs 7–9, 17–19) and dis- (Gy. Makranczy) MHNG Musum d’Histoire naturelle Genve tinctly projecting on either side of ventral process in (G. Cuccodoro) ventral view (Fig. 45); internal sace with additional MNHNP Musum national d’Histoire naturelle, Paris membranous subapical structures. (A. Taghavian) MNHUB Museum fr Naturkunde der Humboldt-Universitt Ber- Comparative notes. The species with a distinctly punctu- lin (J. Frisch, J. Willers) red head and pronotum are most similar to species of the NHMB Naturhistorisches Museum Basel genus Sunius, those with a very fine and dense puncta- (M. Brancucci, I. Zrcher-Pfander) tion of the forebody are extremely similar to species of NHMW Naturhistorisches Museum Wien the genus Pseudomedon. From both genera, Luzea is reli- (H. Schillhammer) SDEI Deutsches Entomologisches Institut, Mncheberg ably separated only by the characteristic morphology of (L. Behne, L. Zerche) the aedeagus, particularly the shape of the ventral pro- cAss author’s private collection cess (see above) and the conspicuous latero-apical struc- cFel private collection Benedikt Feldmann, tures of the internal sac, from Sunius and some Pseudo- Mnster medon species additionally by the broadly concave cGon private collection Andrej Gontarenko, Odessa posterior margin of the male sternite VIII. Characters cKas private collection Vitaly Kastcheev, Almaty distinguishing females of Luzea on the generic level from cRen private collection Klaus Renner, Bielefeld cSch private collection Michael Schlke, Berlin Sunius and Pseudomedon, respectively, were not found. cSta private collection Werner Starke, Warendorf Based on the derived morphology of the aedeagus, un- cWun private collection Paul Wunderle, Mnchengladbach doubtedly a synapomorphy, there is no doubt that the species currently attributed to Luzea form a monophy- The morphological studies were carried out using a Stemi SV 11 mi- lum. Whether or not this taxon represents a distinct croscope (Zeiss Germany) and a Jenalab compound microscope (Carl genus, however, can only be clarified in the context of a Zeiss Jena). For the photographs a digital camera (Nikon Coolpix phylogenetic analysis of the subtribe Medonina. 995) was used. Head length was measured from the anterior margin of the clypeus Identification. Owing to weakly pronounced character to the posterior margin of the head, elytral length at the suture from divergence in some species pairs or species groups, the apex of the scutellum to the posterior margin of the elytra. some character overlap, as well as often pronounced in- The maps were generated using the online generic mapping tool traspecific variation of external characters such as col- (GMT) of the Geomar website at www.aquarius.ifm-geomar.de/omc. oration, body size, eye size, wing length, punctation, and microsculpture, a reliable identification is some- Luzea Blackwelder, 1952 times possible only based on the male sexual charac- ters. This particularly applies to the two most common Luzea Blackwelder, 1952: 228; replacement name [for Micromedon species of the genus, L. nigritula and L. graeca.Inor- Luze, 1912]; type species: Medon caucasicus Luze, 1912. Micromedon Luze, 1912: 396; preoccupied by Micromedon Casey, der to assess the shape of the ventral process of the 1905 [today a synonym of Sunius Stephens, 1829] aedeagus, microscopic preparation and examination un- Stictomedon Scheerpeltz, 1968: 51; nomen nudum. der a compound microscope are in these cases required. Diagnosis. Habitus and morphology of head, including Diversity, distribution and bionomics. Based on a study mouthparts, similar to those of Pseudomedon and Su- of types and additional material from numerous local- museum-dez.wiley-vch.de # 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Dtsch. Entomol. Z. 57 (1) 2010, 117–135 119 ities, eight species are recognised. Thus, Luzea is much of species such as L. nigritula. Flying specimens