Cephennium reductum, Assing & Meybohm, 2021

Assing, Volker & Meybohm, Heinrich, 2021, The Cephennium fauna of Turkey and the Middle East (Coleoptera: Staphylinidae: Scydmaeninae), Beiträge Zur Entomologie = Contributions to Entomology 71 (1), pp. 1-28 : 19-20

Cephennium reductum spec. nov.

urn:lsid:zoobank.org:act:CB292C96-5EC1-4947-AE0F-3D3F3094C77A

( Figs 13 , 48–50 , Map 3 )

Type material: Holotype : “TR Mersin (48), Güzeloluk–Erdemli , S Aydinlar 1350 m / (48) 7.5.2004, leg. Brachat & Meybohm, 36°44'59N 34°7'48E / Holotypus  Cephennium reductum sp. n., det. V. Assing 2020” (cAss) . Paratypes: 1 : “TR Mersin (46), Kirobasi–Güzeloluk , 14 km W Güz. 1430 m / 36°45'1N 33°57'51E (46) 8.5.2004, leg. Brachat & Meybohm” (cAss); 1 , 1 : “ N37°52' E031°20', Türkei Umg. Beysehir, Gedikli 7 km s. 1000 m, Meybohm 14.5.2000 ” (cAss); 1 , 1 : “ N36°26' E032°53', Türkei nördl. Anamur, Ermenek Umg. 1450 m, Meybohm 20.5.2000 ” (cAss); 1 : “ N36°21' E032°56', Türkei Umg. Anamur, Abanoz 1240 m, Meybohm 19.5.2000 ” (cAss); 1 : “ N36°44'01 E33°51'16, Türkei Mersin (8), Kirobasi 1390 m, 1 km w. Kirobasi / Ku[l]turland am Bach, 19.4.2005 (8), leg. Brachat & Meybohm” (cAss); 1 : “TR Mersin (41), road Mut– Karaman, Sertavul Gec. 1570 m / 36°55'28N 33°16'26E (41), 5.5.2004, leg. Brachat & Meybohm” (cAss); 1 : “TR [36a] – Kastamonu, 40 km NW Kastamonu, 41°42'05"N, 33°28'17"E, 1090 m, calcareous slope, 9.IV.2009, V. Assing” (cAss) .

Etymology: The specific epithet (Latin, adjective) alludes to the conspicuously small internal structures of the aedeagus.

Description: In external characters similar to species of the C. corruptum group (see below). Body length 1.0– 1.1 mm. Habitus slender ( Fig. 13 ). Eyes composed of approximately five defined ommatidia without pigmentation. Punctation of pronotum slightly to distinctly less fine than that of elytra. Elytra each with a small obliquely oval impression with whitish tomentose pubescence anteriorly. Hind wings completely reduced.

: protibia unmodified; metaventrite extensively triangularly depressed (not impressed); aedeagus ( Figs 48–50 ) 0.27–0.29 mm long, approximately twice as long as broad in ventral view; capsule bulbous, basally subcircular in cross-section; ventral process apically moderately broadly truncate and in the middle with small projection in ventral view; internal sac with two very small apico-median structures; paramere apically extending slightly beyond apex of median lobe, with short apical seta.

Comparative notes: This species is distinguished from the externally similar representatives of the C. corruptum group by a more oblong aedeagus with a bulbous capsule (not strongly depressed dorso-ventrally), with a more slender and apically less broadly truncate ventral process, and with smaller internal structures of different shapes and arrangement, from the geographically close C. corruptum also by more distinct punctation of the pronotum. It differs from other described and undescribed species of the C. jonicum group, which are distributed in the Balkans, primarily by the shapes of the internal structures (especially the apical structure) of the aedeagus, from most of them also by a smaller aedeagus.

Distribution and natural history: Unlike the externally similar species of the C. corruptum group (see below),

C. reductum is not locally endemic, but distributed in both the Pontic (Kastamonu) and the Taurus Mountains (Konya, Antalya, Mersin) ( Map 3 ). The specimens were sifted from grass and moss in a calcareous slope and from litter of Crataegus and Berberis (partly near rocks). The altitudes range from 1000 to 1570 m.

Figures

Map 3: Distributions of the species of the Cephennium jonicum and C. corruptum groups in Turkey: C. unguicum (grey stars); C. deplectens (white stars); C. sicaferum (grey triangles); C. duplum (grey diamonds); C. geminum (grey circles); C. reductum (black triangles); C. corruptum (black circles); C. fimbriatum (white square); C. besucheti (black square); C. affimbriatum (white circles); C. marasicum (black diamonds); C. dolucanum (white triangle); C. kartalicum (black star); C. nemruticum (white diamond).

Figs 9–16: Male habitus in dorsal view of Cephennium varispinosum (9), C. victrix (10), C. spinigerum (11), C. digitale (12), C. reductum (13), C. corruptum (14), C. marasicum (15), and C. dolucanum (16). Scale bar: 1.0 mm.

Figs 48–58: Aedeagus in lateral (48) and in ventral view (49–58) of Cephennium reductum (48–50), C. nemruticum (51), C. marasicum (52), C. dolucanum (53), C. besucheti (54), C. affimbriatum (55), C. kartalicum (56), C. corruptum (57), and C. fimbriatum (58). Scale bar: 0.1 mm.