Oedichirus species

Assing, V., 2014, On the Oedichirus fauna of China (Coleoptera: Staphylinidae: Paederinae), Linzer biologische Beiträge 46 (2), pp. 1229-1240 : 1238-1239

Key to the Oedichirus species of China and Taiwan

1 Macropterous species. Elytra with pronounced humeral angles, much broader than, and at least approximately as long as pronotum. Abdomen bicoloured....................................2

- Micropterous species; elytra much shorter than pronotum, approximately 0.7 times as long as pronotum at most; humeral angles obsolete. Abdomen of more or less uniform coloration. Species with restricted distributions.................................................................3

2 Distinctly bicoloured species. Forebody with the reddish pronotum distinctly contrasting with the blackish head and the blackish elytra; abdomen with segments III- VI reddish and the apex (segments VII-X) blackish. Japan, North and South Korea; in China recorded from Shanghai and Guangxi. ......................................... O. lewisius SHARP

- Forebody uniformly reddish-brown; abdomen with segments III-VI brown and the apex (segments VII-X) black.: primary and secondary sexual characters as illustrated by HAYASHI (1989). South Japan, Taiwan. ........................ O. kuroshio HAYASHI

3 Body blackish with pale-yellowish appendages. Yunnan ..................................................4

- Body reddish to reddish-brown with pale-yellowish appendages.......................................5

4 Elytra slightly longer, approximately 0.6 times as long as pronotum ( Fig. 13 ); pronotum with punctation as in Fig. 13 .: sternite VII with smaller and sparsely punctate postero-median impression ( Figs 16-17 ); sternite VIII anteriorly with a pair of obliquely scraper-shaped structures, posteriorly strongly impressed, and with deeper and less broad posterior excision ( Figs 18-19 ); aedeagus with longer and distinctively shaped subapical processes, with distinct dorsal plate, and with longer parameres ( Figs 9-10 ). Yunnan: Diancang Shan ( Map 1 ). .............................................. O. schuelkei nov.sp .

- Elytra slightly shorter, 055-0.57 times as long as pronotum ( Fig. 21 ); pronotum in posterior half with two posteriorly converging series of punctures ( Fig. 21 ).: sternite VII with larger and impunctate postero-median impression ( Figs 24-25 ); sternite VIII anteriorly without pair of elevations, with a pair of short carinae posteriorly, with a less pronounced posterior impression, and with a broader and shallower posterior excision ( Figs 26-27 ); aedeagus with much shorter subapical processes of different shapes, with distinctly shorter parameres, and without distinct dorsal plate ( Figs 11-12 ). Yunnan: environs of Tengchong ( Map 1 ). ...................................................... O. abbreviatus nov.sp .

5 Larger species; length of forebody approximately 5.0 mm. Pronotum more oblong, approximately 1.2 times as long as broad ( Fig. 1 ). Elytra longer, approximately 0.7 times as long as pronotum ( Fig. 1 ).: sternite VII with more pronounced posteromedian impression and with pronounced pair of folds posteriorly ( Figs 4-5 ); posterior excision of sternite VIII broader and less deep ( Figs 4-5 ); aedeagus with subapical processes of distinctive shapes ( Figs 7-8 ). Northeastern Yunnan ( Map 1 ). .......................... ............................................................................................................. O. latexcisus nov.sp.

- Smaller species; length of forebody <4.0 mm. Pronotum less oblong, <1.2 times as long as broad. Elytra shorter, <0.7 times as long as pronotum.: sternite VII with less pronounced postero-median impression and with less pronounced pair of folds; posterior excision of sternite VIII narrower and deeper; aedeagus with subapical processes of different shapes. Zhejiang: Tianmu Shan. ........................ O. flammeus KOCH

Figures

Map 1: Distributions of the micropterous Oedichirus species of China: O. abbreviatus (white circles); O. schuelkei (black circles); O. latexcisus (white star); O. flammeus (black star).

Figs 13-20: Oedichirus schuelkei nov.sp.: (13) forebody; (14) antenna; (15) abdominal segments III-VI in dorsal view; (16) male sternite VII in ventral view; (17) male sternite VII in lateral view (turned by 90°); (18) male segment VIII in ventral view; (19) male sternite VIII in lateral view; (20) male tergites IX-X. Scale bars: 1.0 mm.

Figs 7-12: Aedeagi of Oedichirus species in lateral and in ventral view: (7-8) Oedichirus latexcisus nov.sp.; (9-10) O. schuelkei nov.sp.; (11-12) O. abbreviatus nov.sp. Scale bars: 0.5 mm.

Figs 21-28: Oedichirus abbreviatus nov.sp.: (21) forebody; (22) antenna; (23) abdominal segments III-VI in dorsal view; (24) male sternite VII in ventral view; (25) male sternite VII in lateral view (turned by 90°); (26) male segment VIII in ventral view; (27) male sternite VIII in lateral view; (28) male tergites IX-X. Scale bars: 1.0 mm.

Figs 1-6: Oedichirus latexcisus nov.sp.: (1) forebody; (2) antenna; (3) abdominal segments III-VI in dorsal view; (4) male abdominal segments VII-VIII in ventral view; (5) male abdominal segments VII-VIII in lateral view; (6) male tergites IX-X. Scale bars: 1.0 mm.