Aspidaphaenops Uéno, 2006

Tian, Mingyi & Huang, Sunbin, 2018, Contribution to the knowledge of the cavernicolous beetle genus Aspidaphaenops Uéno from Guizhou (Coleoptera: Carabidae: Trechinae), Zootaxa 4422 (2), pp. 244-258 : 245

Key to species of Aspidaphaenops Uéno, 2006

1 Mentum bisetose, pronotum with latero-margins narrowly reflexed, shoulder of elytra not serrated ( masakii species group).. 2

- Mentum quadrisetose, pronotum with latero-margins widely and strongly reflexed, shoulder of elytra clearly serrated at margins ( reflexus species group)............................................................................. 4

2 Head distinctly dilated at sides ( Fig. 2 A ), base of pronotum wider than front.......... Aspidaphaenops masakii Uéno, 2006

- Head straight or slightly dilated at sides ( Figs. 2B, C ), base of pronotum as wide as front............................. 3

3 Head thicker, slightly dilated at sides ( Fig. 2 B ), fore angles of pronotum obtuse.. Aspidaphaenops volatidraconis Uéno, 2006

- Head thinner, straight at sides ( Fig. 2C ), fore angles of pronotum sharp.................... Aspidaphaenops dudou n. sp.

4 Head sub-parallel-sided ( Fig. 2D ), fore angles of pronotum feebly protruded, hind lobes of pronotum less reflexed, fore lateromarginal setae at about 1 / 5 of pronotum from front.............................. Aspidaphaenops reflexus Uéno, 2006

- Head gradually narrowed posteriad ( Fig. 2E ), fore angles of pronotum strongly protruded, hind lobes of pronotum more reflexed, fore latero-marginal setae at about 1/4 of pronotum from front.................. Aspidaphaenops xiongda n. sp.

Figures

FIGURE 2. Heads of Aspidaphaenops species, dorsal view (A. A. masakii; B. A. volatidraconis; C. A. dudou n. sp.; D. A. reflexus; E. A. xiongda n. sp.).