Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 74. (Budapest 1982)

Shilenkov, V. G.: Some notes on South Siberian Trechini (Coleoptera, Carabidae) with descriptions of three new species

ANNALES HISTORICO-NATURALES MUSEI NATIONALIS HUNGARICI Tomus 74. Budapest, 1982 p. 85-91. Some notes on South Siberian Trechini (Coleoptera, Carabidae) with descriptions of three new species by V. G. SHILENKOV, Irkutsk Abstract — Three new species of Trechus from southern Siberia and northern Mongolia are described. Some new data on the taxonomy and distribution of other southern Siberian Trechini, as well as identification key to the species are given. With 17 figures. The ground-beetle fauna of Southern Siberia (from Altai to Transbaikal region) is not known adequately, whereas this interesting territory with expansive mountain systems appears to be a centre of endemism for some groups of insects. As for Trechini, only two species of Epaphius, six species of Trechus (three species described below) and one species of Altaiotrechus are now known from this region. Perhaps the Trechini fauna was severely affected during Pleistocene ice period. But undoubtedly, subsequent investigations of alpine and subalpine zones of Altai and Sajan Mountains will bring new species into science. In the present paper author will introduce into science three new species of Trechus from South Siberia and Northern Mongolia. Some new data on the taxonomy and distribution of other South Siberian Trechini will also be given. Before going further I wish to express my heartfull thanks to DR. Z. KASZAB for his indispensible support of this study, to DR. B. A. KOROTYAEV (Leningrad) and DR. V. G. MORDKOVITSCH (Novosibirsk) for kindly loaning specimens, and DR. S. I. KELEJNIKOVA (Moskow), who has provided facilites for studying type specimens of V. MOTSCHULSKY'S collection. The following abbreviations will be used below : ZIL — Zoological Institute, Academy of Sciences, Leningrad. ZMM — Zoological Museum of Moscow State University. HNHM — Hungarian Natural History Museum, Budapest. ISU — collection of V. G. SHILENKOV, Irkutsk State University. MN - collection of V. G. MORDKOVITSCH, Institut of Soil and Agrochemistry, Novosibirsk. IDENTIFICATION KEY TO THE SPECIES 1 (4) Stria 3 with three discal setiferous pores. 2 (3) Pronotum (fig. 1) strongly rounded at sides, with very obtuse hind angles, basal part prominent behind them level Epaphius (Epaphius) secalis (PAYK.) 3 (2) Pronotum (fig. 2) with rectangular or slightly acute hind angles, its basal part normal Epaphius (Epaphiolus) rivularis (GYLL.) 4 (1) Stria 3 with two dorsal setiferous pores. 5 (6) Larger (5.0-6.5 mm). Pronotum (fig. 3) with rectangular or slightly acute hind angles, basal margin stright, lateral sides rather widely reflexed, especially at basal half. Striae deep, strongly punctate Trechus rubens (F.) 6 (5) Smaller (2,9-3,6 mm). Hind angles of pronotum obtuse or rounded, if slightly acute, basal margin sinuated. Striae shallow, smooth or indistinct punctate. 7 (12) Eyes small, flat, scarcely longer or equal temporae. Aedeagus at apex with hook, curved dorsally. Fore tibiae without groove on external face. Mountaineous tundra of Altai, Sajan and Changai Mts. Annls hist.-nat. Mus. natn. hung., 74,1982