Onycholabis stenothorax, Liang, Hongbin & Kavanaugh, David H., 2005

Liang, Hongbin & Kavanaugh, David H., 2005, A Review of Genus Onycholabis Bates (Coleoptera: Carabidae: Platynini), with Description of a New Species from Western Yunnan, China, The Coleopterists Bulletin 59 (4), pp. 507-520 : 508-510

Key to Adults of the Species of Genus Onycholabis Bates

1 Pronotum trapezoidal, apex wide (PW/PAW ¼ 1.0–1.1), anterior angles angulate, sharply pointed at tips ( Fig. 1 ) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2

19 Pronotum more or less cordate, apex narrow (PW/PAW ¼ 1.3–1.5), anterior angles round, obtuse at tips ( Fig. 2 ) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3

(holotype); 2) O. melitopus (paratype); 3) O. nakanei ; 4) O. sinensis (holotype).

2(1) Pronotum widest at apex, anterior angles protruded forward, then bent ventrad and sharply pointed at the tips - - - - - - - - - - - - - - - - - O. pendulangulus Liang and Imura

29 Pronotum widest at apical one-fifth, anterior angles protruded forward, sharply pointed at tips, but not bent ventrad - - - - - - - - - - - - - - - - - - - - - O. acutangulus Andrewes

3(19) Pronotum wide (PW/PL ¼ 1.45), with one seta at each basal angle - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - O. sinensis Bates

39 Pronotum narrow (PW/PL ¼ 1.0–1.3), without seta at basal angle - - - - - - - - - - - - - - - 4

4(3) Elytral apex at sutural angle acute and posteriorly projected ( Fig. 2 ); sixth visible sternum with two marginal setae in male, four in female - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - O. melitopus Bates

49 Elytral apex at sutural angle rounded, not posteriorly projected ( Fig. 3 ); sixth visible sternum with two or four marginal setae in male, six or eight in female - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5

5(49) Pronotum slightly wider than head (PW/HW ¼ 1.02–1.04); metepisternum impunctate; sixth visible sternum with four marginal setae in male, eight in female - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - O. nakanei Kasahara

59 Pronotum narrower than head (PW/HW ¼ 0.85–0.92); metepisternum coarsely punctate; sixth visible sternum with two marginal setae in male, six in female - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - O. stenothorax , new species

Figures

Figs. 1–4. Dorsal habitus of Onycholabis species, scale line ¼ 1.0 mm. 1) O. acutangulus