Platydracus brachycerus Smetana & Davies, 2000

Zhou, Cheng-Lin, Zhao, Qing-Hao & Tang, Liang, 2024, A taxonomic study of the Platydracus brachycerus group with descriptions of three new species from China (Coleoptera: Staphylinidae, Staphylininae), Zootaxa 5399 (5), pp. 505-516 : 506-507

Platydracus brachycerus Smetana & Davies, 2000

( Figs. 1, 2 , 13, 14 )

Ocypus brevicornis Weise, 1877: 367 . [homonym]

Staphylinus (Neotasgius) brevicornis ; Müller 1925: 41; Yuh et al. 1985: 244.

Platydracus brachycerus Smetana & Davies, 2000: 24 ; Hu 2020: 346. [replacement name]

Material examined. Japan: 1♁, G. Lewis, Sharp Coll 1905-313 ( BMNH).

Measurements. Male: BL: 15.4 mm, FL: 7.3 mm. HL: 1.86 mm, HW: 2.19 mm, EYL: 0.66 mm, TL: 0.81 mm, PL: 2.52 mm, PW: 2.45 mm, EL: 3.07 mm, EW: 2.92 mm. HW/HL: 1.18, TL/EYL: 1.23, PL/PW: 1.03, EL/EW: 1.05.

Distribution. This species is widely distributed in Japan (Hokkaido, Honshu, Kyushu, Shikoku) ( Newton 2021) and reported from South Korea ( Yuh et al. 1985).

Diagnosis. The species is similar to P. juang in appearance, but it can be distinguished from the latter by the more prominent temples, shorter pronotum, and coarser punctation of the head.

Figures

FIGURES 1–6. Habitus. 1, 2—Platydracus brachycerus; 3, 4—P. juang; 5, 6—P. smetanai. Scale bars: 2 mm.

FIGURES 13–18. Aedeagal characters. 13, 14—Platydracus brachycerus; 15, 16—P. juang; 17, 18—P. smetanai; 13, 15, 17— aedeagus in ventral view; 14, 16, 18—aedeagus in lateral view. Scale bars: 0.5 mm.