Pselaphodes

Yin, Zi-Wei, Li, Li-Zhen & Gu, Fu-Kang, 2012, Taxonomic study on the genus Pselaphodes Westwood (Coleoptera, Staphylinidae, Pselaphinae) from China. Part III, Zootaxa 3189, pp. 29-38 : 36-38

Key to males of Chinese Pselaphodes

1. Antennomeres VII modified, asymmetric, either expanded or with a mesal spine-like protuberance ( Yin et al. 2011: 468, Fig. 21; Yin et al. 2010: 13, Fig. 97).......................................................................... 2

- Antennomere VII not modified, nearly symmetric, simple in form.............................................. 8

2 (1). Antennomere X not modified ( Yin et al. 2011: 468, Fig. 21; Yin et al. 2010: 13, Figs. 97–98)......................... 3

- Antennomere X variously, strongly modified ( Yin et al. 2010: 13, Figs. 90–92, 99)................................ 5

3 (2). Antennomere IX not modified ( Yin et al. 2010: 13, Fig. 98) (Zhejiang)................ P. latilobus Yin, Li et Zhao, 2010

- Antennomere IX more or less expanded mesally ( Yin et al. 2011: 468, Fig. 21; Yin et al. 2010: 13, Fig. 97).............. 4

4 (3). Larger, over 3.50 mm; antennomeres V–VI each much longer than wide, IX slightly expanded mesally ( Yin et al. 2010: 13, Fig. 97) (Sichuan)........................................................... P. hlavaci Yin, Li et Zhao, 2010

- Smaller, below 3.00 mm; antennomeres V–VI each slightly longer than wide, IX strongly expanded mesally ( Yin et al. 2011: 468, Fig. 21) (Sichuan)..................................................... P. meniscus Yin, Li et Zhao, 2011

5 (2). Antennomere IX with a disc-shaped process near anterior margin ( Yin et al. 2010: 13, Fig. 91). (Guizhou)...................................................................................... P. miraculum Yin, Li et Zhao, 2010

- Antennomeres IX lacking disc-shaped process near anterior margin, ( Yin et al. 2010: 13, Figs. 90, 92, 99).............. 6

6 (5). Scapus with a large lateral sensory area, antennomere X strongly concave at middle of mesal margins ( Yin et al. 2010: 13, Fig. 99). (Zhejiang)........................................................... P. declinatus Yin, Li et Zhao, 2010

- Scapus lacking sensory area, antennomere X slightly or not concave ( Yin et al. 2010: 13, Figs. 90, 92)................ 7

7 (6). Antennomere XI strongly modified, curved laterally and dramatically broadened towards apex ( Yin et al. 2010: 13, Fig. 92); pronotum with anterolateral margins rounded ( Yin et al. 2010: 4, Fig. 1). (Shaanxi, Henan).................................................................................................... P. nomurai Yin, Li et Zhao, 2010

- Antennomeres XI simple, nearly oval ( Yin et al. 2010: 13, Fig. 90); pronotum with anterolateral margins strongly angulate ( Yin et al. 2010: 4, Fig. 4 ). (Zhejiang, Jiangxi).......................................... P. walkeri (Sharp, 1892)

8 (1). Antennomeres IX with indistinct to conspicuously protuberant disc-shaped process nearanterior margin (Fig. 5; Yin et al. 2011: 468, Figs. 13, 15, 18, 20)......................................................................... 9

- Antennomeres IX lacking disc-shaped process near anterior margins ( Yin et al. 2011: 468, Figs. 14, 16, 17, 19, 22, 23, 24)..................................................................................................... 18

9 (8). Antennomere X with a finely punctate ventral disc-shaped process ( Yin et al. 2011: 468, Fig. 13).................... 10

- Antennomere X lacking ventral disc-shaped process ( Yin et al. 2011: 468, Figs. 14–20, 22–24)...................... 11

10 (9). Antennal club well-defined ( Yin et al. 2011: 468, Fig. 13); mesotibia with a tiny spine-like apical projection ( Yin et al. 2011: 466, Fig. 1). (Xizang).................................................... P. biwenxuani Yin, Li et Zhao, 2011

- Antennal club indistinct ( Yin et al. 2010: 13, Figs. 95–96); mesotibiae lacking apical projection ( Yin et al. 2010: 11, Fig. 63; 12, Fig. 65). (Anhui, Zhejiang, Jiangxi, Fujian, Guizhou, Sichuan, Guangxi, Hianan).. P. tianmuensis Yin, Li et Zhao, 2010

11 (9). Apical part of metatibiae modified ( Yin et al. 2011: 467, Fig. 8; Yin et al. 2010: 11, Fig. 59; 12, Fig. 70).............. 12

- Metatibiae simple................................................................................... 14

12 (11).Protibia with median or apical projection; metatibia with strongly protuberant apical modification ( Yin et al. 2010: 6, Fig. 11; 11, Fig. 58)........................................................................................ 13

- Protibia lacking projection; metatibia with slightly protuberant apical modification ( Yin et al. 2011: 467, Fig. 8). (Yunnan)......................................................................... P. jizushanus Yin, Li et Zhao, 2011

13 (12).Body black ( Yin et al. 2010: 4, Fig. 3); antennomeres X much wider than long ( Yin et al. 2010: 13, Fig. 93); procoxa with a posterior denticle; protibia with a small apical process ( Yin et al. 2010:11, Fig. 58). (Qinghai)..................................................................................................... P. torus Yin, Li et Zhao, 2010

- Body reddish brown; antennomere X much longer than wide ( Yin et al. 2010: 13, Fig. 100); procoxa lacking denticle; protibia with median process ( Yin et al. 2010: 6, Fig. 11). (Anhui, Yunnan, Hainan).............. P. aculeus Yin, Li et Zhao, 2010

14 (11).Antennal club as in Fig. 5 or Yin et al. 2011: 468, Fig. 18; metacoxae protuberant (Fig. 65)......................... 15

- Antennal club as in Yin et al. 2011: 468, Fig. 15 or Yin et al. 2010: 13, Figs. 94, 101; metacoxa not protuberant ( Yin et al. 2010: 12, Fig. 77)................................................................................... 16

15 (14).Elytra with two pairs of discal humps ( Yin et al. 2011: 466, Fig. 6). (Yunnan)..... P. gongshanensis Yin, Li et Zhao, 2011

- Elytra lacking discal humps ( Fig. 2). (Guangxi)............................................... P. hui new species

16 (14).Mesofemur simple ( Yin et al. 2011: 472, Fig. 68; Yin et al. 2010: 12, Fig. 76)................................... 17

- Mesofemur with a tiny submedian spine ( Yin et al. 2010: 11, Fig. 61). (Henan).......... P. cornutus Yin, Li et Zhao, 2010

17 (16).Antennae and legs conspicuously long ( Yin et al. 2010: 6, Fig. 12); protrochanters simple ( Yin et al. 2010: 12, Fig. 70). (Yunnan)................................................................. P. subtilissimus Yin, Li et Zhao, 2010

- Antennae and legs elongate ( Yin et al. 2011: 466, Fig. 3); protrochanter with a distinct spine ( Yin et al. 2011: 471, Fig. 51). (Guizhou, Guangxi)........................................................ P. condylus Yin, Li et Zhao, 2010

18 (8). Head with genae angularly expanded laterally ( Fig. 1); antennomere XI strongly modified ( Fig. 4 ). (Guangxi)............................................................................................ P. dayaoensis new species

- Head with genae rounded laterally; antennomere XI simple (Fig. 6; Yin et al. 2011: 468, Figs. 14, 16–17, 19, 22–24; Hlaváč et al. 2000: 150, Fig. 1 -A)............................................................................... 19

19 (18).Antennomeres IX–X ( Yin et al. 2011: 468, Figs. 14, 16) strongly modified....................................... 20

- Antennomeres IX–X simple ( Yin et al. 2011: 468, Figs. 17, 19, 22, 23, 24; Hlaváč et al. 2000: 152, Fig. 2 -A; Fig. 6)...... 21

20 (19).Antennal club as in Yin et al. 2011: 498, Fig. 14; anterolateral margins of pronotum roundly angulate (Fig. 26); mesofemora covered with long setae ( Yin et al. 2011: 472, Fig. 67); metacoxae spinose ( Yin et al. 2011: 472, Fig. 64); aedeagus as in Yin et al. 2011: 474, Fig. 93–94. (Xizang)........................................... P. bomiensis Yin, Li et Zhao, 2011

- Antennal club as in Yin et al. 2011: 498, Fig. 16; anterolateral margins of pronotum not angulate ( Yin et al. 2011: 469, Fig. 28); mesofemora lacking long setae ( Yin et al. 2011: 472, Fig. 69); metacoxae simple; aedeagus as in Yin et al. 2011: 474, Figs. 97– 98. (Xizang).............................................................. P. cuonaus Yin, Li et Zhao, 2011

21 (19).Protibiae modified in apical halves ( Yin et al. 2011: 471, Figs. 62–63)........................................... 22

- Protibiae simple...................................................................................... 23

22 (21).Antennomere IX much shorter than XI ( Yin et al. 2011: 468, Fig. 17); metaventral processes long ( Yin et al. 2011: 470, Fig. 41); protibia slightly protuberant mesally near the apices ( Yin et al. 2011: 471, Fig. 62). (Zhejiang)............................................................................................. P. fengtingae Yin, Li et Zhao, 2011

- Antennomere IX about as long as XI ( Yin et al. 2011: 468, Fig. 23); metaventral processes short ( Yin et al. 2011: 470, Fig. 47); protibia with a small median spine-like process and a well-defined mesoapical protuberance ( Yin et al. 2011: 471, Fig. 63).

(Hainan)................................................................ P. pectinatus Yin, Li et Zhao, 2011 23 (21).Prochanter simple ( Yin et al. 2011: 471, Fig. 60; Hlaváč et al. 2000: 152)........................................ 24

- Prochanter with a distinct spine ( Yin et al. 2011: 471, Figs. 55, 58; Fig. 18)...................................... 25

24 (23).Legs simple without spines ( Yin et al. 2011: 468, Fig. 12; 472, Figs. 60, 77); aedeagus as in Yin et al. 2011: 475, Figs. 109– 110. (Guizhou)............................................................. P. yanbini Yin, Li et Zhao, 2011

- Legs with profemora and mesotrochanters each with a spine ( Hlaváč et al. 2000: 152); aedeagus as in Hlaváč et al. 2000: 152, Fig. 2, B–C. (Yunnan).......................................... P. yunnanicus (Hlavá ĕ, Nomura et Zhou, 2000)

25 (23).Larger, over 3.0 mm; antennae and legs extremely long ( Yin, Li et Zhao, 2011: 467, Fig. 7); profemur without spine, covered with conspicuously long setae ( Yin, Li et Zhao, 2011: 471, Fig. 55); mesotrochanter with a distinct spine ( Yin, Li et Zhao, 2011: 472, Fig. 72); aedeagus as in Yin, Li et Zhao, 2011: 475, Figs. 103–104). (Xizang).................................................................................................... P. hanmiensis Yin, Li et Zhao, 2011

- Smaller, below 2.8 mm; antennae and legs long ( Fig. 3; Yin, Li et Zhao, 2011: 467, Fig. 10); profemur covered with short setae and with a large median spine (Fig. 18; Yin, Li et Zhao, 2011: 471, Fig. 58); mesotrochanter with multiple spines (Fig. 21; Yin, Li et Zhao, 2011: 472, Fig. 75).......................................................................... 26

26 (25).Mesotrochante with three spines ( Yin, Li et Zhao, 2011: 472, Fig. 75); aedeagus with apex of median lobe not forked ( Yin, Li et Zhao, 2011: 475, Fig. 107–108). (Guizhou)..................................... P. parvus Yin, Li et Zhao, 2011

- Mesotrochanter with two spines (Fig. 21); aedeagus with apex of median lobe forked (Fig. 27). (Guangxi)............................................................................................ P. maoershanus new species

Figures

FIGURE 4 21. Male antennal club (4 6), pronotum (7 9), metaventral process (10 12, in lateral view), apical portion of pro tibia (13 15), protrochanter and profemur (16 18), and mesotrochanter and mesofemur (19 21) of Pselaphodes spp. 4, 7, 10, 13, 16, 19. P. daoyaoensis. 5, 8, 11, 14, 17, 20. P. hui. 6, 9, 12, 15, 18, 21. P. maoershanus. Scales: a f, m r = 0.3 mm; g i = 0.2 mm; j l = 0.05 mm.