Cephennium duplum, 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 : 27

Cephennium duplum spec. nov.

urn:lsid:zoobank.org:act:B2B65A3E-757E-44EB-9F6F-C46D7523A3EB

( Figs 65–66 , Map 3 )

Type material: Holotype : “ N36°43' E029°14', Türkei Umg. Fethiye, Kadyanda 850 m, Meybohm 28.4.2001 / Holotypus  Cephennium duplum sp. n., det. V. Assing 2020” (cAss) . Paratypes: 1 : “ N36°33' E029°07', T Umg. Fethiye, Ölüdeniz , 150 m, 27.4.2001, Meybohm / Brachat ” (cAss); 1 : “ N36°33' E029°07', Türkei Umg. Fethiye, Ölüdeniz , 150 m, Meybohm 27.4.2001 ” (cAss); 1 : “ N36°36' E029°06', Türkei Umg. Fethiye, Fethiye, 360 m, Meybohm 27.4.2001 ” (cAss) .

Etymology: The specific epithet (Latin adjective:doubled) alludes to the presence of two pairs of claw-shaped structures in the internal sac of the aedeagus.

Description: Body length 0.9–1.0 mm. Eye rudiments minute, composed of three or four weakly defined ommatidia without pigmentation. Other external and male secondary sexual characters as in the preceding species.

: aedeagus ( Fig. 65–66 ) approximately 0.20 mm long; internal sac with two pairs of large and strongly curved claw-shaped structures, with an additional pair of weakly curved spines, and with a transverse apico-median structure; paramere apically extending beyond apex of median lobe, with short apical seta.

Intraspecific variation: The internal structures of the two examined males are not completely identical ( Figs 65–66 ). However, the differences are only slight and the two localities are close, so that the differently shaped internal structures are interpreted as intraspecific variation.

Comparative notes: As can be inferred from the similar shapes and arrangement of the internal structures of the aedeagus, C. duplum is most closely allied to the geographically close C. geminum , from which it differs by slightly smaller body size and a smaller aedeagus with less massive and less strongly curved internal spines and with a differently shaped apical structure.

Distribution and natural history: The specimens were found in three localities near Fethiye, Muğla province, Southwest Anatolia ( Map 3 ). The altitudes range from 150 to 850 m.

Unidentified and unnamed species

The following material is represented exclusively by females, so that an adequate description is not possible. Based on external characters, all of them most likely belong to the C. corruptum group.

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 59–69: Aedeagus in ventral/dorsal view (59–68) and internal structures of aedeagus in ventral view (69) of Cephennium unguicum (59), C. deplectens (60), C. sicaferum (61), C. geminum (62–64; 62: Termessos; 63: Olimpos; 64: Kemer), C. duplum (65–66), C. jordanicum (67), and C. judaeum (68–69; drawings by C. Besuchet). Scale bar: 0.1 mm.