Domene, Fauvel, 1873

Zhao, Mei-Jun, 2017, New data on the genus Domene (Coleoptera: Staphylinidae: Paederinae) of mainland China, Zootaxa 4329 (5), pp. 449-462 : 461-462

Key to the Domene species of mainland China

1 Male sternites V and VI with shallow and small postero-median impression.................... D. emeiana Assing, 2015

- Male sternites V and VI without postero-median impression....................................................2

2 Coloration of elytra brownish red.................................................. D. procera Eppelsheim, 1886

- Coloration of elytra much darker (usually brown or black).....................................................3

3 Male sternite VII without distinctly modified setae...........................................................4

- Male sternite VII with modified setae..................................................................... 11

4 Male sternite VIII ( Fig. 5E ) with very deep posterior excision, nearly one third as deep as length of sternite........................................................................................... D. jini Peng & Li , new species

- Male sternite VIII with small posterior excision..............................................................5

5 Male sternite VIII with pronounced oblong median impression, on either side of posterior excision without modified setae...................................................................................... D. exicta Assing, 2016

- Male sternite VIII with shallow postero-median impression, on either side of posterior excision with modified black setae.. 6

6 Legs with distinctly bicoloured metafemora................................ D. immarginata Assing & Feldmann, 2014

- Legs with nearly completely blackish-brown metafemora......................................................7

7 Length of antenna no more than 3.4 mm. Elytra nearly as long as pronotum (EL/PL 0.93–0.94)................................................................................................... D. jiangi Peng & Li , new species

- Length of antenna more than 3.6 mm. Elytra distinctly shorter than pronotum (EL/PL ± 0.86)..........................8

8 Median lobe of aedeagus longer (AL 1.29 mm; Figs 6F, G ) and with strongly sclerotized apical portion of dorsal plate............................................................................ D. nanlingensis Peng & Li , new species

- Median lobe of aedeagus shorter (AL 1.07–1.20 mm) and with moderately sclerotized apical portion of dorsal plate....... 9

9 Ventral process of median lobe of aedeagus spear-head shaped in ventral view................... D. contiger Assing, 2016

- Median lobe of aedeagus with very slender ventral process....................................................10

10 Coloration of antennomeres IV–XI paler. Head approximately as broad as long or weakly transverse. Posterior margin of female sternite VIII truncate in the middle............................................ D. affimbriata Assing, 2015

- Coloration of antennomeres IV–XI darker. Head weakly oblong. Posterior margin of female sternite VIII broadly convex...................................................................................... D. hei Peng & Li, 2015

11 Median lobe of aedeagus with completely reduced dorsal plate. Posterior margin of female sternite VIII with distinct median concavity............................................................ D. firmicornis Assing & Feldmann, 2014

- Median lobe of aedeagus with distinct dorsal plate. Female sternite VIII with more or less convex posterior margin....... 1 2

12 Head with fine punctation. Male sternite VIII with shallow postero-median impression, on either side of the shallower poste- rior excision without cluster of setae......................................................................13

- Head with moderately coarse punctation. Male sternite VIII with oblong postero-median impression, on either side of the deeper posterior excision with a dense cluster of black setae...................................................15

13 Legs with yellowish brown metafemora. Antenna shorter (AnL 2.55–2.65 mm). Elytra with coarse macropunctation and shal- low micropunctation. Female genital segments with relatively small sclerotized structure............ D. chenpengi Li, 1990

- Legs with more or less bicoloured metafemora. Antenna longer (AnL 2.78–3.62 mm). Elytra with very fine punctation. Female genital segments with more pronounced structure........................................................... 14

14 Punctation of head and pronotum coarser. Male sternite VII with numerous moderately modified dark setae; ventral process of aedeagus with slender apical portion in lateral view...................................... D. chenae Peng & Li, 2014

- Punctation of head and pronotum less coarse. Male sternite VII with numerous distinctly modified black setae; ventral process

of aedeagus with stout apical portion in lateral view......................................... D. reitteri Koch, 1939 15 Smaller species (FL 4.70–5.20 mm). Aedeagus smaller (AL 1.07–1.18 mm)................ D. malaisei Scheerpeltz, 1965

- Larger species (FL 5.12–6.00 mm). Aedeagus larger (AL> 1.30 mm)...........................................16

16 Legs with distinctly bicoloured meso- and metafemora (basal half yellowish, apical half blackish).....................17

- Legs with brownish or blackish meso- and metafemora.......................................................18

17 Antenna shorter (AnL 3.35 mm; Figs 1G, H ). Head somewhat broader than pronotum. Male sternite VIII ( Fig. 1F ) with Vshaped posterior excision.................................................... D. aqiang Peng & Li , new species

- Antenna longer (AnL 3.6–3.9 mm). Head approximately as broad as pronotum. Male sternite VIII with U-shaped posterior excision........................................................................ D. praefigens Assing, 2015

18 Coloration of body ( Fig. 4C ) blackish brown. Head weakly transverse (HL/HW 0.92; Fig. 7A ). Male sternite VIII ( Fig. 7E ) with extensive median impression................................................. D. tui Peng & Li , new species

- Coloration of body dark brown. Head oblong (HL/HW 1.04–1.14). Male sternite VIII with pronounced oblong median impression...............................................................................................19

19 Median lobe of aedeagus with longer, more slender ventral process. Female genital segments with small symmetric, weakly sclerotized structure....................................................... D. reducta Feldmann and Peng, 2014

- Median lobe of aedeagus with shorter, less slender ventral process. Female genital segments with asymmetric, moderately sclerotized structure......................................................................................20

20 Punctation of elytra coarser and with more rugose interstices, surface nearly matt. Male sternite VII with broadly concave posterior margin; male sternite VIII with shallower impression; ventral process of aedeagus with less slender and less acute apical portion. Female genital segments with smaller sclerotized structures................. D. cultrata Feldmann and Peng, 2014

- Punctation of elytra less coarse and with less rugose interstices, surface slightly more shiny. Posterior margin of male sternite VII concave in the middle; male sternite VIII with deeper impression; ventral process of aedeagus with more slender and more acute apical portion. Female genital segments with larger sclerotized structure....... D. cuspidata Feldmann and Peng, 2014

Figures

FIGURE 1. Domene aqiang. A, habitus; B, head; C, pronotum; D, elytra; E, male sternite VII; F, male sternite VIII; G, aedeagus in lateral view; H, aedeagus in ventral view. Scale bars: A 2.0 mm, B – H 0.5 mm.

FIGURE 4. Habitus of Domene spp., A, D. jini; B, D. nanlingensis; C, D. tui; D, D. procera. Scales: 2.0 mm.

FIGURE 5. Domene jini. A, head; B, pronotum; C, elytra. D, male sternite VII; E, male sternite VIII; F, aedeagus in lateral view; G, aedeagus in ventral view. Scale bars: 0.5 mm.

FIGURE 6. Domene nanlingensis. A, head; B, pronotum; C, elytra. D, male sternite VII; E, male sternite VIII; F, aedeagus in lateral view; G, aedeagus in ventral view. Scale bars: 0.5 mm.

FIGURE 7. Domene tui. A, head; B, pronotum; C, elytra. D, male sternite VII; E, male sternite VIII; F, aedeagus in lateral view; G, aedeagus in ventral view. Scale bars: 0.5 mm.