Carcinocephalus, Bernhauer, 1903

Shavrin, Alexey V., 2025, A new species of the genus Carcinocephalus Bernhauer, 1903 (Coleoptera: Staphylinidae: Omaliinae: Omaliini) from western Nepal, Zootaxa 5620 (2), pp. 397-400 : 399

Key of Carcinocephalus of Eastern Palaearctic region

1 Body distinctly more than 2.50 mm. Coloration reddish-brown to black.......................................... 2

- Body less than 2.00 mm. Coloration paler.................................................................. 3

2 Forebody somewhat shortened, strongly convex, with significantly elevated elongate shield-like portion of head. Postocular ridge large and acute. Head without punctures. Female accessory sclerite as in Fig. 4 . Body length: 3.14 mm. Habitus as in Fig. 1 . Nepal.............................................................................. C. benedikti sp. nov.

- Forebody elongate, less convex, with relatively short and slightly elevated shield-like portion of head. Postocular ridge missing. Head with sparse, large and deep punctation, denser in middle, as in Fig. 2 in Hayashi (2007). Aedeagus as in Fig. 7 in Hayashi (2007). Body length: 2.70−3.40 mm. Habitus as in Fig. 1 in Hayashi (2007). Japan (Honshu).................... C. satoi

3 Forebody moderately convex. Antennomeres 6−8 transverse. Pronotum with dense moderately coarse microsculpture. Elytra twice as long as pronotum. Aedeagus wide, strongly narrowed toward apex, with broadened parameres, significantly longer than apex of median lobe (Fig. 9 in Shavrin (2018)). Female accessory sclerite as in Fig. 7 in Shavrin (2018). Body reddish-brown, with paler elytra. Body length: 1.70−1.98 mm. Habitus as in Fig. 1 in Shavrin (2018). Taiwan.......... C. szujeckii

- Forebody somewhat flattened. Antennomeres 6−8 slightly elongate. Pronotum without microsculpture. Elytra distinctly less than twice as long as pronotum. Aedeagus narrow, with elongate median lobe and truncate apex; parameres very wide, reaching apex of median lobe (Fig. 9 in Shavrin (2022)). Female accessory sclerite as in Fig. 15 in Shavrin (2022). Body yellow-brown, with darker head. Body length: 1.82 mm. India (Assam)............................................ C. cuccodoroi

Figures

FIGURES 1–5. Carcinocephalus benedikti: 1—habitus, 2—female genital segment (ventral view; postabdominal segments (tergite IX and sternite IX) not shown), 3—tergite VIII (dorsal view); 4—sternite VIII (ventral view), 5—spermatheca. Scale bars: 1.00 mm (Fig. 1), 0.10 mm (Figs. 2–4), 0.05 (Fig. 5).