Anaulacaspis nigrina ( FAGEL, 1969 )

Assing, Volker, 2016, Revision of the Anaulacaspis species of the Palaearctic region (Coleoptera: Staphylinidae: Aleocharinae), Beiträge Zur Entomologie = Contributions to Entomology 66 (2), pp. 201-255 : 243-244

Anaulacaspis nigrina ( FAGEL, 1969)

( Figs 167–172 , Map 3 )

Melagria nigrina FAGEL, 1969: 13 ff.

Type material examined: Holotype ♂: “ Anatolie mér., Alanya : Dim Irmak , VI.1968 G. Fagel / G. Fagel det., nigrina n. sp. / Type / Anaulacaspis nigrina (Fagel) , det. V. Assing 2016” ( IRSNB) . Paratypes: 22 exs.: same data as holotype ( IRSNB) .

Comment: The original description is based on a male holotype and “Nombreux exemplaires” from “Alanya ... Dim Irmak” ( FAGEL 1969).

Additional material examined: Greece: Lesbos: 1 ♂, 1 ♀, Lambou Mili , 39°08'N, 26°23'E, 110 m, sifted, 19.III.2005, leg. Lompe & Meybohm (cAss); 2 ♂♂, 14 km WNW Mytilini, S Lambou Mili, 39°08'N, 26°24'E, 50 m, stream bank, 22.III.2016, leg. Assing & Hetzel (cAss); 1 ♂, same data, but 28.III.2016 (cAss) .

Turkey: Muğla: 1 ♂, 6 ♀♀, 25 km E Fethiye, Kemer , 36°38'N, 29°22'E, river bank, 4.X.2002, leg. Assing (cAss) .

Isparta: 1 ♀, 10 km SE Sütçüler , 37°25'N, 31°02'E, 1520 m, meadow, under stones, 26.IV.2011, leg. Assing (cAss) .

Antalya: 1 ♂, 32 km NE Mahmutlar, N Karapınar, Gevne Cay river , 36°37'N, 32°25'E, 1050 m, 29.V.2006, leg. Skale (cAss); 1 ♀, Beskonak, 31.V.1992, leg. Gillerfors (cWun) .

Kahramanmaraş: 1 ♀, 60 km W Kahramanmaraş, N Andırın, 37°37'N, 36°21'E, 1120 m, stream bank, flood debris, 26.III.2005, leg. Assing (cAss) .

Iran: Kordestan: 1 ♂, 27 km SW Saqqez , 2 km SW Mir Deh, 36°08'N, 46°03'E, 1600 m, 3.IX.2008, leg. Frisch & Serri ( MNB) . Ilam: 3 ♀♀, 10 km NW Eyvan , 5 km W Alamdar, 33°52'N, 46°11'E, 1170 m, 18.X.2011, leg. Frisch ( MNB, cAss) .

Redescription: Body length 1.7–2.2 mm; length of forebody 0.8–1.1 mm. Coloration: whole body including appendages black, with parts of the tibiae and tarsi sometimes and the narrow posterior margins of the elytra rarely indistinctly paler dark-brown to blackish-brown.

Head approximately 1.15 times as broad as long, with weakly pronounced sexual dimorphism. Eyes slightly longer than postocular region in dorsal view. Antenna 0.6–0.7 mm long.

Pronotum approximately 1.15 times as broad as long and as broad as head, with moderately pronounced sexual dimorphism.

Elytra approximately as long as pronotum; punctation fine and dense; interstices without microsculpture. Hind wings fully developed.

Abdomen approximately as broad as, or slightly narrower than, elytra; punctation dense and distinct; interstices without appreciable microsculpture; tergite VIII ( Fig. 167 ) with weakly concave posterior margin and with long and unmodified marginal setae, postero-laterally without cluster of long thin setae.

♂: head with or without indistinct depression in posteromedian portion and with fine, distinct, and moderately dense punctation; pronotum shallowly and usually extensively depressed or impressed in the middle, punctation distinct and moderately dense, not asperate; sternite VIII ( Fig. 168 ) strongly convex posteriorly; median lobe of aedeagus ( Figs 169–171 ) approximately 0.25 mm long, ventral process apically acute in lateral view, slender in ventral view.

♀: head with fine punctation, on average somewhat finer than in male; pronotum with the usual small posteromedian impression near posterior margin, but without extensive impression in postero-median portion, punctation finer than in male; sternite VIII ( Fig. 172 ) strongly transverse, posterior margin broadly concave, in the middle weakly concave.

Comparative notes: Despite some external resemblance to some species of the A. nigra group, A. nigrina is more closely related to A. laevigata and allied species, as can be inferred from the absence of a postero-lateral cluster on tergite VIII, from the shapes of the male and female sternites VIII, and from the morphology of the median lobe of the aedeagus. It is distinguished from the similarly coloured and similarly finely punctate A. nigerrima and A. libanotica of the A. nigra group by the chaetotaxy of tergite VIII (without a postero-lateral cluster of long setae on either side), by the completely different shapes of the male and female sternites VIII, by smaller body size, and by the morphology of the median lobe of the aedeagus.

Distribution and natural history: Based on the examined material, the distribution ranges from the Greek island Lesbos across Turkey eastwards to Iran ( Map 3 ). The examined material was collected on the banks of rivers and streams either by hand-collecting or by sifting debris; one specimen was found under a stone in a meadow. The altitudes range from 50 to 1600 m.

Figures

Map 3: Distributions of Anaulacaspis formosa (black circles), A. elegans (white circles), A. nigrina (black diamonds), A. eminens (white diamonds), and A. nigerrima (stars) in the West Palaearctic and Middle Asia, based on revised records.

Figs 164–186: Anaulacaspsis iberica (164–166), A. nigrina (167–172), A. beijingensis (173–177), A. taiwanica (178–183), and A. gilva (184–186): male tergite VIII (164, 167, 173, 178, 184); male sternite VIII (165, 168, 174, 179, 185); female sternite VIII (166, 172, 177, 183); median lobe of aedeagus in lateral and in ventral view (169–171, 175–176, 180–181); female tergite VIII (182); spermatheca (186). Scale bars: 0.1 mm.