Pselaphodes Westwood, 1870

Yin, Zi-Wei, Li, Li-Zhen & Zhao, Mei-Jun, 2010, Taxonomical study on the genus Pselaphodes Westwood (Coleoptera: Staphylinidae: Pselaphinae) from China. Part I., Zootaxa 2512, pp. 1-25: 2-3

publication ID

http://doi.org/ 10.5281/zenodo.294046

persistent identifier

http://treatment.plazi.org/id/03BE527D-FFB1-B534-FF55-90F4B1AFFBBD

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Plazi

scientific name

Pselaphodes Westwood, 1870
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Key to Chinese species of Pselaphodes Westwood, 1870  (males)

In the genus Pselaphodes  , like in many other pselaphine genera, examination of male secondary sexual characters is necessary for correct species identification. It is impossible to identify most species based only on female specimens, as females of related species are too similar and have very few characters that can be used in taxonomical work. This is why the key presented below is based on males only.

Males can be distinguished from females mainly by the presence of a pair of long or short basal metaventral processes, which are absent in females; abdominal tergite VIII and sternite VIII in males always bear a median emargination, while the posterior margins of tergite VIII and sternite VIII are completely flat in the females.

1 Antennal club (VII –XI) with strong modifications ( Figs. 90, 91, 92, 97, 99View FIGURES 90 – 101)............................................................. 2

- Antennal club (VII –XI) without strong modifications ( Figs. 93, 94, 95, 96, 98, 100, 101View FIGURES 90 – 101) ....................................... 6

2 Antennomere VII strongly modified, with a basal denticle on inner side ( Fig. 97View FIGURES 90 – 101). Habitus: Fig. 8View FIGURES 5 – 8. China (Sichuan) ......................................................................................................................................................... P. hlavaci  sp. nov.

- Antennomere VII normal, less modified, without denticle ( Figs. 90, 91, 92, 99View FIGURES 90 – 101)........................................................ 3

3 Pronotum in apical one-third with lateral protuberance on each side. Habitus: Fig. 4View FIGURES 1 – 4. China (Shanxi, Henan)............ ........................................................................................................................................................ P. nomurai  sp. nov.

- Pronotum in apical one-third expanded or rounded, but without lateral protuberance ............................................... 4

4 Scape with sensory fovea laterally, antennomere X strongly excavated mesally ( Fig. 99View FIGURES 90 – 101). Habitus: Fig. 10View FIGURES 9 – 12. China (Zhejiang) .................................................................................................................................... P. declinatus  sp. nov.

- Scape without sensory fovea, antennomere X not deeply emarginate mesally ( Figs. 90, 91View FIGURES 90 – 101) .................................... 5

5 Antennomere IX nearly triangular, curved apicomesally; X transverse, slightly narrowed from middle to apex ( Fig. 90View FIGURES 90 – 101); profemur with small spine posteromedially, protrochanter with large apical spine (Fig. 52); mesotrochanter with

two small apical spines (Fig. 53). Habitus: Fig. 1View FIGURES 1 – 4. China (Zhejiang, Jiangxi) ....................... P. walkeri ( Sharp, 1892)  - Antennomere IX nearly quadrate, protuberant mesoapically, with apical hook; X elongate, gradually expanded from base toward apex ( Fig. 91View FIGURES 90 – 101); profemur with large spine posteromedially, protrochanter with smaller apical spine (Fig. 54); mesotrochanter with apical spine (Fig. 55). Habitus: Fig. 2View FIGURES 1 – 4. China (Guizhou) ................... P. miraculum  sp. nov.

6 Legs extremely elongate and slender, without any spines or protuberances (Figs. 75–77). Habitus: Fig. 12View FIGURES 9 – 12. China (Yunnan).................................................................................................................................... P. subtilissimus  sp. nov.

- Legs normally elongate, trochanters, femora or tibiae always with some spines or protuberances (Figs. 58–65, 68 – 70, 73, 74) .................................................................................................................................................................... 7

7 Mesofemur very thick (Figs. 59, 69), pro-, meso- or metatibia with mesoapical protuberance (Figs. 58, 59, 68–70) 8

- Mesofemur somewhat slender (Figs. 61, 63, 65, 74), tibiae without protuberance mesally (Figs. 60–65, 73, 74) ..... 9

8 Body dark. Pro- and mesotibia with strong apical protuberances (Figs. 58, 59). Apical margin of elytra weakly angulated ( Fig. 16View FIGURES 13 – 24). Habitus: Fig. 3View FIGURES 1 – 4. China (Qinghai) .................................................................................. P. torus  sp. nov.

- Body yellowish-brown. Pro- and mesotibia without protuberances (Figs. 68–69), metatibia with subapical protuberance (Fig. 70). Apical margin of elytra strongly angulate ( Fig. 23View FIGURES 13 – 24). Habitus: Fig. 11View FIGURES 9 – 12. China (Yunnan) ....................... ......................................................................................................................................................... P. aculeus  sp. nov.

9 Mesotrochanter close to apex with three spines (Fig. 62). Habitus: Fig. 6View FIGURES 5 – 8. China (Fujian, Jiangxi) ............................. ........................................................................................................................................................ P. wuyinus  sp. nov.

- Mesotrochanter without spines or only with one or two spines at mid length .......................................................... 10

10 Mesotrochanter lacking spines at mid length .................................... P. yunnanicus ( Hlaváċ, Nomura & Zhou, 2000) 

- Mesotrochanter bearing one or two spines at mid length (Figs. 61, 65, 74) ............................................................. 11

11 Body yellow. Basal half of maxillary palpomere II nearly straight ( Fig. 144View FIGURES 138 – 149). Habitus: Fig. 7View FIGURES 5 – 8. China (Zhejiang) ...... ................................................................................................................................................. P. tianmuensis  sp. nov.

- Body reddish-brown. Basal half of maxillary palpomere II strongly curved ( Figs. 142, 146View FIGURES 138 – 149) .................................. 12

12 Antenna with antennomere VI slender and elongate, twice as long as wide, antennomere IX strongly asymmetrical ( Fig. 94View FIGURES 90 – 101). Abdominal tergite VIII narrowed from middle to apex (Fig. 110), sternite VIII deeply emarginated at middle of apex (Fig. 111); aedeagus with median lobe expanded through length in lateral view ( Fig. 158View FIGURES 150 – 161), curving rightward in dorsal view ( Fig. 159View FIGURES 150 – 161). Habitus: Fig. 5View FIGURES 5 – 8. China (Henan) .................................................... P. cornutus  sp. nov.

- Antenna with antennomere VI nearly quadrate, one and one-fourth as long as wide, antennomere IX nearly symmetrical ( Fig. 98View FIGURES 90 – 101); tergite VIII narrowed from apical one-third to apex (Fig. 118), sternite VIII (Fig. 119) with apex shallowly emarginated at middle, aedeagus with median lobe extremely broadened, curved in lateral view ( Fig. 166View FIGURES 162 – 173), expanded, and then pointed at apex in dorsal view ( Fig. 167View FIGURES 162 – 173). Habitus: Fig. 9View FIGURES 9 – 12. China (Zhejiang) P. latilobus  sp. nov.