Araneibatrus

Yin, Zi-Wei, Jiang, Ri-Xin & Steiner, Helmut, 2016, Revision of the genus Araneibatrus (Coleoptera: Staphylinidae: Pselaphinae), Zootaxa 4097 (4), pp. 475-494 : 478-479

Key to species of Araneibatrus

1 Length of clypeus about one-third of total head length; body, antennae, and legs extremely elongate ( Figs 3 , 4 E–F)....... 2

- Length of clypeus much less than one-third of total head length; body, antennae, and legs distinctly elongate, but not as extreme as above ( Figs 1 , 2 , 4 A–D)....................................................................... 3

2 Pronotal disc with pair of large antebasal spines; elytra with relatively smaller basal foveae ( Fig. 4 F); sternite IV lacking mediobasal foveae, with three pairs of basolateral foveae ( Fig. 9 F).................................. A. spinosus sp. n.

- Pronotal disc lacking antebasal spines; elytra with relatively larger basal foveae ( Fig. 4 E); sternite IV with one pair of mediobasal and three pairs of basolateral foveae ( Fig. 9 E)...................................... A. pubescens sp. n.

3 Vertex with a distinct pair of lateral carinae extending from posterior margins of antennal tubercles toward postocular margins ( Fig 4 A–C)......................................................................................... 4

- Vertex lacking lateral postantennal carinae ( Fig. 4 D)........................................ A. gracilipes Yin & Li

4 Pronotal disc bears coarse punctation ( Fig 4 C), with a pair of dorsal carinae.................... A. grossepunctatus sp. n.

- Pronotal disc finely punctate ( Fig. 4 A–B), lacking dorsal carinae............................................... 5

5 Pronotum relatively more slender, PL/PW> 1.19 ( Fig. 4 A); male with strongly modified antennomeres IX–XI ( Fig. 1 A; Nomura & Wang 1991: fig 3A–B)...................................... A. callissimus (Nomura & Wang) comb. n.

- Pronotum relatively wider, PL/PW = 1.06 ( Fig. 4 B); male with unmodified antennomeres IX–XI ( Fig. 1 B)..................................................................................................... A. cellulanus sp. n.

Figures

FIGURE 1. Dorsal habitus of Araneibatrus species. A. A. callissimus, male. B. A. cellulanus, male. Scales: 0.5 mm.

FIGURE 2. Dorsal habitus of Araneibatrus species. A. A. grossepunctatus, male. B. A. cf. gracilipes, female. Scales: 0.5 mm.

FIGURE 3. Dorsal habitus of Araneibatrus species. A. A. pubescens, male. B. A. spinosus, male. Scales: 0.5 mm.

FIGURE 4. Head dorsum and pronotum of Araneibatrus species. A. A. callissimus. B. A. cellulanus. C. A. grossepunctatus. D. A. cf. gracilipes. E. A. pubescens. F. A. spinosus. Scales: 0.2 mm.

FIGURE 9. Sternites III and IV of Araneibatrus species. A. A. callissimus. B. A. cellulanus. C. A. grossepunctatus. D. A. gracilipes. E. A. pubescens. F. A. spinosus. Scales: 0.2 mm.