Omalium excavatum Stephens, 1834

Shavrin, Alexey V. & Khachikov, Eduard A., 2023, Faunistic and diagnostic notes on some species of the genus Omalium Gravenhorst, 1802 of Caucasus, Turkey and Iran (Coleoptera: Staphylinidae: Omaliinae, Omaliini), Zootaxa 5227 (4), pp. 443-458 : 448-449

Omalium excavatum Stephens, 1834

( Figs. 3 , 17–18 , 35 )

Omalium excavatum Stephens, 1834: 355

Material examined. RUSSIA: KRASNODAR TeRRITORY: 1 ♀: Caucasus Nature Reserve, “Instruktorskaya Shchel` Path. 06.07.2013. Yu.A. Chumachenko leg. (cKh); KARACHAY-CHeRKeSSIA: 2 ♁♁: Teberda State Nature Biosphere Reserve, near Arkhyz, Kizgitсh Gorge. 1400 m a.s.l., swamp with Carex , Juncus and mosses. 05.06.1985. A.B. Ryvkin leg. (cR); 1 ♁, 2 ♀♀: Baduk Lakes, 43°3777215′N 41°651188′E. 14– 16.08.2020. E.A. Khachikov & K. Klimovich leg. (cKh).

Published records. AZERBAIJAN: Leder 1886: 120.

Distribution. Omalium excavatum is widely distributed in the Holarctic Region ( Schülke & Smetana 2015).

Remarks. Habitus as in Fig. 3 . Aedeagus as in Figs. 17–18 . Female genital segment as in Fig. 35 .

It is here recorded from Krasnodar Territory and Karachay-Cherkessia for the first time.

Figures

FIGURES 1–10. Habitus of Omalium: 1—O. caesum (Turkey, Bursa: Uludağ), 2—O. cinnamomeum (Turkey, Antakya: Kişlak- Şenköy), 3—O. excavatum (Russia, Karachay-Cherkessia: Arkhyz), 4—O. falsum (Georgia, Tskhneti), 5—O. littorale (Russia, Adygea: Abago), 6—O. riparium impar (Russia, Krasnodar Territory: Khosta), 7—O. rivulare (Armenia, Alaverdi), 8—O. rugatum (Iran, Zagros Mts.), 9—O. turcicum (Russia, Adygea: Lagonaki), 10—O. wunderlei (Turkey, Gümüşhane: Erzincan- Kelkit). Scale bars: 1.0 mm.

FIGURES 11–18. Aedeagus of Omalium caesum (Figs. 11–12: Turkey, Antakya: Kişlak-Şenköy), O. cinnamomeum (Figs. 13–14: Turkey, Antakya: Kişlak-Şenköy), O. cribriceps (Figs. 15–16: Iran, Lorestan), O. excavatum (Figs. 17–18: Russia, Karachay-Cherkessia: Arkhyz): 11, 13, 15, 17—parameral view, 12, 14, 16, 18— lateral view. Scale bars: 0.1 mm.

FIGURES 33–41. Female genital segment (ventral view) and spermatheca (shown by arrow in Fig. 40) of Omalium: 33—O. caesum (Russia, North Ossetia-Alania: Zincar), 34—O. cinnamomeum (Turkey, Antakya: Kişlak-Şenköy), 35—O. excavatum (Russia, Krasnodar Territory: Caucasus Nature Reserve), 36—O. falsum (Turkey, Rize: Ardeşen), 37—O. littorale (Russia, Volgograd Area: Elton Lake), 38—O. riparium impar (Georgia, Tskhneti), 39—O. rivulare (Russia, Krasnodar Territory: Derbiy), 40—O. rugatum (Russia, North Ossetia-Alania: Zincar), 41—O. turcicum (Russia, Krasnodar Territory, Caucasus Nature Reserve). Scale bars: 0.1 mm.