Acrolocha amabilis ( Heer, 1841 )

Shavrin, Alexey V. & Khachikov, Eduard A., 2019, On some species of the genus Acrolocha Thomson, 1858 of the Western Palaearctic Region (Coleoptera: Staphylinidae: Omaliinae: Omaliini), Zootaxa 4576 (2), pp. 347-356 : 348

Acrolocha amabilis ( Heer, 1841)

( Figs. 1 , 4 ¯5)

Omalium amabile Heer, 1841: 567 (type locality: “Jorat, Chalet à Gobet”); Kraatz 1857: 999

Acrolocha amabilis: Scheerpeltz 1937: 122 ; Steel 1957: 163; Lohse 1964: 37; Tóth 1976a: 86, 1976b: 117, 1982: 49; Zanetti 1979: 548, 1987: 165, 2012: 100

Omalium hampei L.Redtenbacher, 1857: 250

Material examined. GERMANY: 1 ♀: ‘Germania’ (HNHM); CZECH REPUBLIC: 2 ♂♂: ‘ Bohemia | Reitter.’ (HNHM); AUSTRIA: 1 ♀: ‘Wiener Wald | Rekawinkel | Skalitzky’ (HNHM); BOSNIA AND HERZEGOVINA: 1 ♂, 1 ♀: ‘Stambolčic’, ‘ amabilis Heer’, ‘Coll. Stenius’ (MZHF); 1 ♀: ‘Bosnia | Reitter’ (HNHM); UKRAINE: 4 ♀♀: Ivano-Frankivska Area, Chernogir`skiy zapovidniy masif, Turkul. 27.07.2004. A.V. Gontarenko (CS); 2 ♂♂, 3 ♀♀: Crimea, environs of Kerch. 0 7.02.2015. I.V. Shokhin (CK, CS); RUSSIA: KALUGA AREA: 1 ♂: Tchernyshevo. 28.04- 01.05.1989. S.I. Golovatch (ZMM); KARACHAY- CHERKESSIA: 1 ♂, 3 ♀♀: upper reaches of Laba River, 3 km above from connection with Sanchara River. 10.08.1996. E.A. Khachikov (CK, CS); ADYGEA: 1 ♂: Caucasus Nature Reserve, 11 km of Guzeripl-Abago road, Abago pastureland. 0 6.10.2015. E.A. Khachikov (CK, CS); 2 ♂♂, 1 ♀: same data. 15.09.2014. In litter. (CK); 1 ♂: same Nature Reserve and pastureland, 3 km of Guzeripl-Abago road. 1000 m a.s.l., Fagus -Abies forest, motley grass. Yu.A. Chumachenko (CK); GEORGIA: 1 ♀: Main Caucasian Rudge, 30 km NE Khaishi, near Kherkhvashi. 1750-1800 m a.s.l. Eutrophic-mesotrophic swamp ( Carex spp., Scirpus , mosses). 21.09.1986. A.B. Ryvkin (ZMM); 2 ♂♂, 3 ♀♀: Kakheti, Lagodekhi. 4-5.09- 6.10.2014. G. Dzhapashvili (CK, CS); REGION NOT LOCATED: 2 ♂♂, 3 ♀♀: ‘Böhmerwald’ (HNHM, MZHF).

In addition, we studied several specimens from Karachay-Cherkessia (CK), labels data of which have been published by Khachikov (1998).

Remarks. The aedeagus of A. amabilis was several times illustrated without showing the internal structures by several authors: Steel (1957: 162, Figs. 26, 29), Tóth (1976a: 86, Fig. 2 ) and Zanetti (1979: 550 (Fig. 550), 1987: 164 (Fig. 34f), 2012: 102 (Fig. 50c)). The aedeagus is comparatively variable in its general shape, shape of apical portion of the median lobe, location of six sclerotized elongate structures within the apical part of the internal sac, as well as in different angle between apical horn-shaped projections, which can be narrow ( Fig. 4 ) or markedly wide ( Steel 1957, Fig. 26). Habitus as in Fig. 1 ; outline of the forebody as in Steel (1957: 162, Fig. 23). Ground sculpture of the pronotum as in Steel (1957: 158, Fig. 9 ). Posterior femur and trochanter as in Steel (1957: 158, Fig. 3 ).

Acrolocha amabilis is distributed in the mainland Europe from the Netherlands and France through countries of the Middle Europe to Ukraine, European part of Russia and Caucasus ( Schülke & Smetana 2015; etc.). The record of “ Omalium amabile ” by Kraatz (1857: 999) for Turkey (“….Kleinasien”), later subsequently replicated in check-lists and catalogues, needs confirmation. It is here recorded for the Central European part of Russia and Georgia for the first time.

Figures

FIGURES 1–3. Habitus of Acrolocha: 1—A. amabilis (Heer, 1841) (Crimea), 2—A. caucasica Tóth, 1976 (Karachay- Cherkessia), 3—A. pliginskii Bernhauer, 1912 (Rostov Area). Scale bar: 1.0 mm.

FIGURES 4–8. Aedeagus of Acrolocha (4–5: A. amabilis (Heer, 1841), Karachay-Cherkessia; 6–8: A. pliginskii Bernhauer, 1912 (6–7—type locality. 8—Rostov Area): 4, 6, 8—parameral view, 5, 7—lateral view. Scale bar: 0.1 mm.

FIGURES 9–14. Abdominal segments of Acrolocha caucasica Tóth, 1976: 9—male tergite VIII, 10—male sternite VIII, 11— male genital segment, 12—female tergite VIII, 13—female sternite VIII, 14—female genital segment and accessory sclerite. Scale bar: 0.1 mm.