On the Staphylinidae of the Greek Island Ikaría, with Supplementary
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©Wiener Coleopterologenverein (WCV), download unter www.zobodat.at 88 Koleopt. Rdsch. 87 (2017) Koleopterologische Rundschau 87 89–116 Wien, September 2017 Elytra elongate (length/width ratio: ca. 1.7), subparallel-sided, strongly convex in cross section. Disc with five regular rows of punctures between suture and inner margin of weakly developed shoulder; punctures large, deeply impressed and densely arranged, each with one rear-facing On the Staphylinidae of the Greek island Ikaría, short pale semi-erect, distinctly curved seta; intervals very slightly convex and smooth. Lateral with supplementary notes on the fauna of Samos elytral gutter very narrow; lateral rim strongly serrate. (Coleoptera: Staphylinidae) Hypomeral antennal grooves deep. Metaventral disc pubescent. Ventrites I–V pubescent, ventrites VI–VII glabrous. Legs rather short. V. ASSING Aedeagus (Fig. 2): Main piece ca. 300 µm long, rather evenly curved, with two short ventral subapical setae. Distal lobe flattened, moderately long, in apical half strongly widened ventrally, Abstract apically rather acuminate. Parameres inserted near basal third; with 4–5 moderately long, subapical setae. A field trip to the Greek islands Ikaría and Samos conducted in spring 2017 yielded a total of 1266 adult specimens belonging to 106 species of Staphylinidae. Nine species, eight of them island DIFFERENTIAL DIAGNOSIS: The new species deviates considerably from all other species of endemics, are described and illustrated: Geostiba (Tropogastrosipalia) perdita ASSING sp.n. (Ikaría) Cobalius: 1) small size; 2) dorsal surface more dull and rugose due to dense punctation; 3) semi- of the Aleocharinae, Amauronyx assingi BRACHAT sp.n. (Ikaría), Euplectus meybohmi BRACHAT sp.n. erect setae of dorsal surface stronger; 4) labrum distinctly transverse; 5) small eyes; 6) lateral (Samos), Faronus icariensis BRACHAT sp.n. (Ikaría), Paratychus kerkisicus BRACHAT sp.n. (Samos: Oros Kerkis), and Tychus icariensis BRACHAT sp.n. (Ikaría) of the Pselaphinae, and Euconnus margin of pronotum more regularly rounded, without subbasal excision; 7) legs rather short, with (Tetramelus) ambelosicus MEYBOHM sp.n. (Samos: Oros Ambelos), E. (T.) samius MEYBOHM sp.n. very short spines; 8) aedeagus ventrally widened and apically acuminate. (Samos; Turkey: Aydn: Dilek Dağ), and E. (T.) kerkisicus MEYBOHM sp.n. (Samos: Oros Kerkis) of DISTRIBUTION: So far known only from Sicily, Italy. the Scydmaeninae. One species, Thinobius micros FAUVEL, 1871, is reported from Greece for the first time. A comprehensive and updated list of the named and unnamed species currently known from ETYMOLOGY: Named for Prof. Dr. David T. Bilton (Plymouth University, UK), who collected Ikaría and Samos is provided. Numerous described species are reported from Ikaría for the first time the holotype. and 19 species are newly recorded from Samos. The known staphylinid fauna of Samos currently includes 157 species, that of Ikaría 70 species. Endemic species account for 11 % of the total fauna in Samos (17 species; seven of Pselaphinae, two of Aleocharinae, five of Scydmaeninae, and three of Acknowledgements Paederinae) and 10 % in Ikaría (seven species; four of Pselaphinae, one of Aleocharinae, and two of David T. Bilton (Plymouth, UK) and Paolo Audisio (Rome, Italy) are thanked for sending the Scydmaeninae). Six of the endemic species from Samos (three of Pselaphinae and three of Scydmaeninae) and two endemic species from Ikaría (Scydmaeninae) are unnamed. Approximately type material. half of the species recorded from Ikaría are not known from Samos. The diversity of the Ikarian fauna is greatest in the central (oldest) part of the island. References Key words: Coleoptera, Staphylinidae, Palaearctic Region, East Mediterranean, Greece, Aegean JÄCH, M.A. 1989: Revision of the Palearctic species of the genus Ochthebius Leach II. The subgenus Islands, Ikaría, Samos, taxonomy, new species, diversity, endemism, new records, species list. Cobalius Rey (Hydraenidae, Coleoptera). – Zeitschrift der Arbeitsgemeinschaft Österreichischer Entomologen 41 (1/2): 41–51. JÄCH, M.A. & DELGADO, J.A. 2014: Revision of the Palearctic species of the genus Ochthebius Leach Introduction XXIX. The Asian species of the O. vandykei group (Coleoptera: Hydraenidae). – Koleopterolo- The Greek island Ikaría belongs to the North Aegean Islands and, together with Samos, forms gische Rundschau 84: 81–100. the northern limit of the Southern Sporades. With an area of approximately 255 km2, it has JÄCH, M.A. & SKALE, A. 2015: Hydraenidae, pp. 130–162. – In Löbl, I. & Löbl, D. (eds.): Catalogue of slightly more than half the size of Samos, from which it is separated by approximately 19 km. Palaearctic Coleoptera. Vol. 2. Hydrophiloidea – Staphylinoidea. Revised and updated edition. – The island is nearly 40 km long, with a maximal width of nearly nine km. For nearly all of its Leiden: Brill, xxvi + 1702 pp. length, it is traversed by the Atheras range, whose highest peaks are more than 1000 m of alti- PROKIN, A.A., LITOVKIN, S.V. & JÄCH, M.A. 2016: New records of Hydraenidae and Elmidae (Coleo- tude. Like Samos, Lesbos, Chios, Kos, and Rhodos, Ikaría has been separated from the Anatolian ptera) from Russia and adjacent countries. – Fragmenta Faunistica 58 (2) [2015]: 99–110. mainland only since the end of the last glacial period (TRIANTIS & MYLONAS 2009). While the western half of the island is formed out of Tertiary granite and granodiorite, most of the eastern SABATELLI, S., AUDISIO, P., ANTONINI, G., SOLANO, E., MARTINOLI, A. & TRIZZINO, M. 2016: Molecular ecology and phylogenetics of the water beetle genus Ochthebius revealed multiple independent parts are characterized by gneiss. The central part features the oldest rock types, Upper Palaeo- shifts to marine rockpools lifestyle. – Zoologica Scripta 45 (2): 175–186. zoic green schist and phyllite. As many as 829 species of vascular plants are known from the island, 15 of which have been recorded only from Ikaría (CHRISTODOULAKIS 1996). The north of the island has extensive forests, predominantly pine forests in the western half and deciduous forests (Quercus ilex, Arbutus sp., etc.) in the central and eastern parts. At high elevations of the Dr. Manfred A. JÄCH Atheras range, phrygana predominates, which may be very sparse particularly in the drier west Naturhistorisches Museum Wien, Burgring 7, A – 1010 Wien, Austria ([email protected]) of the island; in moist places Crataegus monogyna is present and may be moderately dense. Dr. Juan A. DELGADO Although there are springs, streams, and reservoirs especially in the north of Ikaría, its habitat Departamento de Zoología, Facultad de Biología, Universidad de Murcia, E – 30100 Murcia, Spain diversity is generally significantly lower than that of Samos. ([email protected]) ©Wiener Coleopterologenverein (WCV), download unter www.zobodat.at 90 Koleopt. Rdsch. 87 (2017) According to SCHÜLKE & SMETANA (2015), 3160 species and subspecies of Staphylinidae are known from Greece. The staphylinid faunas of several larger East Mediterranean islands (Crete, Cyprus, Rhodos, Lesbos, Samos, Chios, Karpathos, Kos) have been addressed recently. For more details regarding species numbers, numbers of endemic species, and other island-related aspects of these islands see ASSING (2013a–b, 2015a–c, 2016a–b, 2017a) and ASSING & WUNDERLE (2001). Recent additions to the faunas of Lesbos and Cyprus were provided by ASSING (2017b, c). The Staphylinidae of Ikaría have never been studied comprehensively. All that is known are scattered records in the literature, nearly all of them in taxonomic revisions treating taxa on a broader scale. A search yielded records of only 13 species: Metopsia assingi ZERCHE, 1998, Bythinus icariensis BESUCHET, 1964, Anotylus clypeonitens (PANDELLÉ, 1867), Anaulacaspis nigra (GRAVENHORST, 1802), Oxypoda attenuata MULSANT & REY, 1853, Pronomaea picea HEER, 1841, Habrocerus pisidicus KORGE, 1971, Stenus maculiger WEISE, 1875, Leptomastax simonis STUSSINER, 1881, Medon caricus FAGEL, 1970, M. dilutus pythonissa (SAULCY, 1865), M. lydicus BORDONI, 1980, Othius lapidicola MÄRKEL & KIESENWETTER, 1848 (ASSING 2004b, 2005b, 2006a, b, 2007, 2008, 2009b, 2012, 2016c, BESUCHET 1964, SCHÜLKE 2012). Only one of these species, Bythinus icariensis, is endemic to Ikaría. The staphylinid fauna of Samos was addressed by ASSING (2009a, 2015c). Including some recent additions (ASSING 2016b, 2017a), it is composed of 140 species, 18 of them endemic to the island. The endemics belong to the Pselaphinae (seven species, five of them undescribed), Aleocharinae (two species), Scydmaeninae (six species, all of them undescribed), and Paederinae (three species). Thus, Samos hosts a greater number of endemics than any of the other Aegean islands close to the Turkish coast, including Rhodos, an island nearly three times its size. Except for Lesbos (201 species), the same applies to overall diversity. While overall diversity may be explained by habitat diversity and the vicinity to the Turkish coast, the remarkable number of island endemics is most likely related to the presence of two formidable mountains ranges (Oros Kerkis, Oros Ambelos) with summits reaching 1443 and 1153 m, respectively. In April 2017, a field trip to Ikaría and Samos was conducted, aiming at a first assessment of the staphylinid fauna of the former and a further exploration of staphylinid fauna of the latter island. The descriptions of the Pselaphinae and Scydmaeninae are authored exclusively by Volker Brachat and Heinrich