Dasycerus sp.

Hashizume, Takuto & Maruyama, Munetoshi, 2022, Taxonomy and phylogeny of the Japanese species of the genus Dasycerus Brongniart (Coleoptera: Staphylinidae: Dasycerinae) with description of a new species and notes on D. poseidon Hu & Liang, Zootaxa 5174 (3), pp. 233-246 : 241

Dasycerus sp.

( Fig. 4 )

Specimen examined. Kyushu: Kagoshima-ken: 2 exs., Hetsuka, Sata, Minamiôsumi-chô, 29 V–5 VI 2021, R. Ito leg. ( KUM); 1 ex., alt. 420 m, Hoyoshi-dake , Ushiroda, Kimotsuki-chô , 30 IV 2021, F. Nakano leg. ( KUM); 3 exs., same data, but 16 VIII 2019 (KUM); 3 exs., same data, but 17 VIII 2019 (KUM); 2 exs., same data, but 30 IV 2021 ( KUM); 2 exs., alt. 245 m, Hoyoshi-dake , Kitakata, Kimotsuki-chô , 30 IV 2021, F. Nakano leg. ( KUM); 1 ex., Inaodake , 22 VI 2021, S. Inoue leg. (KUM).

Distribution. Japan (Kyushu: Ôsumi Peninsula).

Remarks. It is almost identical in appearance to D. japonicus but is smaller and lacks dark spots on the elytra. It also differs in the shape of the female genital chamber ( Fig. 4E ). As described below, we have not yet determined the name of this population. This population was found only on the Ôsumi Peninsula and was collected at a relatively low elevation compared with D. japonicus .

Figures

FIGURE 4. Dasycerus sp. from Ôsumi Peninsula, Kagoshima-ken. (A) Habitus in dorsal view. (B–C) Right elytron in dorsolateral view. (D) Aedeagus in lateral view. (E) Female genital chamber in ventral view. Scale bars: 1.0 mm for A; 0.5 mm for B; 0.2 mm for D–E.