Phymatura russa Assing, 2021

Hashizume, Takuto, Yamamoto, Shûhei & Maruyama, Munetoshi, 2023, Revision of the Genera Pseudatheta Cameron and Phymatura Sahlberg (Coleoptera, Staphylinidae, Aleocharinae) from Japan, Zootaxa 5319 (1), pp. 27-47 : 44

Phymatura russa Assing, 2021

( Figs. 2B , 8D–F )

[Japanese name: Aka-kinokotsuyakeshi-hanekakushi]

Phymatura russa Assing, 2021: 331 (original description;

type locality: “ CHINA: S-Shaanxi ( Qinling Shan ), pass on rd. Zhouzhi—Foping, 105 km SW Xi′an, N-slope, 1990 m, 33°44′N, 107°59′E ”).

Material examined. JAPAN: [Hokkaido]: 1 female, Nopporo-shinrin-kôen, Ebetsu-shi, 16–19 VI 2001, S. Hori leg. ( KUM); 1 ex., Kamibisei, Memuro-chô, 25 VIII 1995, M. Sakai leg. ( EUM) ; [Ehime-ken]: 2 males, Komenomachi, Matsuyama-shi, 8 V 1999, T . Kan leg. ( EUM).

Measurements. (n = 3): BL ≈ 1.98–2.31; FBL: 1.08–1.19; HL: 0.31–0.36; HW: 0.35–0.36; PL: 0.38–0.40; PW: 0.48; EL: 0.39–0.41; EW: 0.59–0.62. Ratios (n = 3): HW/HL: 1.04–1.13, PW/PL: 1.20–1.28, EW/EL: 1.50, PW/HW: 1.32–1.37, EL/PL: 1.00–1.03, EW/PW: 1.22–1.29.

Relative length of antennomeres I–XI (n = 1): 26: 25: 15: 10: 12: 11: 12: 12: 13: 13: 30. Ratio of length/width of antennomeres I–XI (n = 1): 2.09: 2.08: 1.21: 0.71: 0.75: 0.62: 0.60: 0.55: 0.61: 0.55: 1.46.

Distribution. Japan (Hokkaido, Shikoku)—new record; China (Shaanxi).

Remarks. Phymatura russa is recorded from Japan for the first time. This species can be distinguished from the other Phymatura species recorded from Japan by its nearly uniformly reddish coloration, the smaller eyes, and the shapes of the aedeagus and the spermatheca. This species has been collected from Hokkaido and Shikoku, and may be widely distributed in mainland Japan (see Assing (2021) for detailed description of Ph. russa ).

Figures

FIGURE 2. Habitus of Phymatura spp. and type specimens examined. A. Phymatura japonica Cameron, 1933, stat. rev.; B. Phymatura russa Assing, 2021; C. lectotype of Atheta (Datomicra) crenulicauda Bernhauer, 1907 (=Pseudatheta crenulicauda comb. nov.); D. labels of C; E. holotype of Phymatura japonica Cameron, 1933, stat. rev. Scale bars: 1.0 mm for A–B.

FIGURE 8. Phymatura spp. A–C: Ph. japonica Cameron, 1933, D–F: Ph. russa Assing, 2021. A, D. male tergite VIII in dorsal view; B, E. median lobe of aedeagus in lateral view; C, F. spermatheca. Scale bars: 0.1 mm.