Exaesiopus atrovirens Reichardt, 1926

Lackner, Tomas, 2015, Revision of the genus Exaesiopus Reichardt, 1926 (Coleoptera, Histeridae, Saprininae), ZooKeys 479, pp. 65-108 : 81-87

Taxon classification Animalia Coleoptera Histeridae

Exaesiopus atrovirens Reichardt, 1926 Figs 73, 74-79, 80-88

Exaesiopus atrovirens Reichardt 1926: 17; Mazur (1984): 101; (1997): 263; (2004): 92; (2011): 210.

Type locality.

Arys, Kazakhstan.

Type material examined.

Holotype, ♂, with male genitalia extracted and glued to the subsequent label with male sign, with following labels: “♂” (printed); followed by circular golden label; followed by: "St. Arys / Tashkenskaya Zh d. / 27.v.[1]921 / na sklonach / saye, na osypyach / on the other side of the same label is written: "obryvystych kra- / yov i vypotov / soli. neredko / k reke / sb. I. Ivanov" (hand-written label on both sides); followed by: " Exaesiopus / atrovirens sp. n. / A. Reichardt det." (written-printed label with black margin); followed by red, printed label: “Holotypus” (ZIN). Paratypes: 1 ♂ +1 ♀, with circular golden label, followed by written label: "St. Aris / Tashkenskaya Zh. d. / I. Ivanov 27.v.[1]921"; followed by: " Exaesiopus / atrovirens sp.n. / A. Reichardt det. (printed-written); followed by red label, written: “Paratypus”; followed by: "Zoological / Institute RAS / St. Petersburg" (yellow label, printed). 1 ♂, with circular golden label, followed by written label: “Askhabad”; followed by: " Exaesiopus / atrovirens sp. n. / A. Reichardt det." (written-printed); followed by: “Paratypus” (hand-written red label); followed by: "Zoological / Institute RAS / St. Petersburg" (yellow label, printed); followed by yellow, pencil-written label: “09-060” (added by myself); 1 spec., with circular golden label, followed by: "Caucas, further illegible"; (black-turned, formerly red label, printed-written); followed by: "Coll. / Semenov Tian-Shansky" (written-printed); followed by: " Exaesiopus / atrovirens sp. n. / A. Reichardt det." (written-printed label); followed by: “Paratypus” (hand-written red label); 1 ♂, with male genitalia extracted and glued to the subsequent label with male sign, with following labels: “♂” (printed); followed by circular golden label; followed by: "Caucasus / Coll. Kusnetzov / A. Semenov Tian-Shansky" (written-printed label); followed by: " Exaesiopus / atrovirens sp. n. / A. Reichardt det." (written-printed label); followed by: “Paratypus” (hand-written red label); 1 spec., with circular golden label; followed by: "Owtshaly? / 11 mai / 1880" (written); followed by: “62” (pink label, written); followed by: "k. [=coll.] G. Siversa" (printed label in Russian); followed by: " Saprinus / grossipes / Mrs." (written label); followed by: " Exaesiopus / atrovirens sp. n. / A. Reichardt det." (written-printed label); followed by: “Paratypus” (hand-written red label); 1 spec., with golden circular label, followed by: "Turkestan / Sansar / Glasunov 1892" (black-margined printed label); followed by: "prope group / Hls. mit lang / Wimperhaaren / nur nicht / Akinini" (written); followed by: "k. [=coll.] A. Jacobsona" (printed); followed by: “Paratypus” (red label, written); 1 spec., with golden circular label, followed by: "St. Aris / Tashk. [Tashkentskaya] Zhe. [iron] d. [railway] / I. Uvarov 27.v.[1]921"; followed by: " Exaesiopus / atrovirens sp. n. / A. Reichardt det." (written-printed label); followed by hand-written red label: “Paratypus”; followed by: "Zoological / Institute RAS / St. Petersburg" (yellow label, printed) (all type specimens ZIN).

Additional material examined.

Armenia: 1 spec., Yerevan, 19.v.1938, Richter (ZIN). Tajikistan: 1 ♀ & 1 spec., Pyandzh, from Khorog to Ishkashim, 6.vi.1928, Grishin leg. (ZIN); 1 spec., ibid, but BMNH. Azerbaijan: 1 spec., Khudat, SE Samura, 8.vii.1913, Lyukyanovitsh leg. (ZIN); Kazakhstan: 1 spec., Kazakhstan, river Ural near Kharkin, 7.v.1951, Gurjeva leg. (MNHN); 1 ♀, r. Ural near Kharkin, 13.v.1951, L. Arnoldi leg., under Tamarix in the sand (ZIN); 1 spec., Uralskaya obl., Kalmykov, 31.vii.1908, Borodin (ZIN); Russia: 2 specs., Volgogradskaya obl. Kamyshyn, 7.v.1939, Lyubyshev leg. (ZIN); 1 ♂, Dagestan, Terekli-Mekteb, Karanogaysk. steppe, 15.v.1925, Kirichenko leg. (ZIN); 5 specs., Astrakhan Region, Krasniy Yar district, near Dosang vill., 8.v.2009, A. Kovalyov leg. (CAS); 1 spec., ibid, 17.v.1998, 46°54'N, 47°54'E, K. Makarov & A.Brinyov leg (CAS). TURKEY: 1 spec., vill. Artvin, Cankurtaran Geç., 3.vi.2000, J. Mertlik leg. (TLAN); 1 spec., 21.vi.2003, Erzurum vill., ca 50 km S, Hamzalar - Hot Springs, 39°27'N, 41°07', 1935 m, Jiří Hájek & Josef Hotový leg. (TLAN); 1 spec., Adana, 1903, no further data (BMNH). IRAN: Dorahi, 16.vi.1973, collector unknown (MNHN). Afghanistan: 1 ♂, Central, Gesab, 1400 m, 14.vi.1970, Kabakov leg. (ZIN). Georgia: 1 ♀, Mzcheta near Tbilisi, 12.-13.vi.1987, leg. Wrase & Schülke (NCB). UKRAINE: 1 spec., Kherson reg. Golaya Pristan distr. near Ribalche, 6.-9.v.1994, I. Melnik leg. (CAS).

Diagnostic description.

Body length: PEL: 2.50-2.75 mm; APW: 1.00-1.10 mm; PPW: 2.00-2.25 mm; EW: 2.125-2.40 mm; EL: 1.50-1.875. Body shape (Fig. 73) as in its congeners, cuticle with greenish metallic tinge; legs, mouthparts and antennae reddish-brown. Antennae as those of Exaesiopus grossipes ; sensory structures of the antenna not examined. Mouthparts: mandibles somewhat more slender than those of Exaesiopus grossipes ; labrum with large antero-median depression, otherwise similar to that of Exaesiopus grossipes ; mentum and rest of the mouthparts likewise. Clypeus (Fig. 74) rectangular, rugose, anterior margin elevated, depressed medially; frontal, supraorbital and postorbital striae (Fig. 74) as in Exaesiopus grossipes ; frons with several irregularly shaped carinate transverse rugae intermingled with numerous tiny rugae; at times transverse rugae obliterated under numerous tiny rugae; eyes flattened, but visible from above. Pronotum as in Exaesiopus grossipes . Elytra similar to that of Exaesiopus grossipes ; inner subhumeral stria present medially; elytral punctation, however, mostly confined to apical half of elytra, only rarely punctures present on other than fourth elytral interval. Punctation of propygidium (Fig. 75) and pygidium similar to those of Exaesiopus grossipes , but punctures on propygidium almost confluent. Prosternum (Fig. 76) most similar to that of Exaesiopus glaucus , foveae small but deep; prosternal process asetose. Mesoventrite (Fig. 77) occasionally sparsely and finely punctate, otherwise similar to that of Exaesiopus glaucus ; intercoxal disc of metaventrite similar to that of Exaesiopus glaucus ; longitudinal depression in female very faint; lateral metaventral stria, rest of lateral disc of metaventrite, metepisternum + fused metepimeron (Fig. 78) most similar to those of Exaesiopus glaucus , but the amber setae distinctly longer and denser. Intercoxal disc of first abdominal sternite most similar to that of Exaesiopus glaucus . Protibia (Fig. 79) similar to that of Exaesiopus glaucus , differing from it chiefly by lower teeth topped by large triangular denticle. Mesotibia and metatibia similar to those of Exaesiopus glaucus ; metatibia, however, slightly more thickened and dilated.

Male genitalia. Eighth sternite (Fig. 86-87) fused along its entire length, apically asetose, velum tiny; eighth tergite apically faintly inwardly arcuate; eighth sternite and tergite fused laterally (Fig. 84). Ninth tergite (Figs 85, 88) apically faintly inwardly arcuate; spiculum gastrale (Figs 82-83) similar to other congeners. Aedeagus (Figs 80-81) short and stout, gradually dilated anteriorly, apex with pseudopores, parameres fused along their basal two-thirds (approximately), aedeagus slightly curved ventrad (Fig. 81).

Differential diagnosis.

Exaesiopus atrovirens is most similar externally to Exaesiopus glaucus , differing from it by longer vestiture on underside of the body, numerous irregular rugae of frons, more thickened and dilated metatibia, larger triangular denticles of protibia, and male genitalia (compare Figs 80-88 with Figs 107-113; see also Key to species for details). From the rest of the congeners it differs chiefly by its greenish metallic hue of the dorsum (other species are not metallic).

Biology.

Found in sand, often under Tamarix .

Distribution.

Known from Turkey, Russia, Armenia, Azerbaijan, Georgia, Kazakhstan, Iran, Afghanistan and Turkmenistan. New to Ukraine and Tajikistan.