Tribasodites bedosae, Yin & Li, 2011

Yin, Zi-Wei, Nomura, Shûhei & Li, Li-Zhen, 2015, Ten new species of cavernicolous Tribasodites from China and Thailand, and a list of East Asian cave-inhabiting Pselaphinae (Coleoptera: Staphylinidae), Acta Entomologica Musei Nationalis Pragae 55 (1), pp. 105-127 : 122-123

Key to males of the Tribasodites bedosae species-group

Comments. Tribasodites tiani was described based on a single female, thus it is excluded from the following key. This species may be separated from the other congeners by the relatively large median portion of the female genital complex, as well as its distribution ( Fig. 13A ). Supplementary illustrations of antennae and metaventrites of T. bedosae and T. deharvengi are provided ( Fig. 11 ) in this paper for comparative purpose.

1 Pronotum with lateral margins lacking spines. ........................................................ 2

– Pronotum with spinose lateral margins. .................................................................. 4

2 (1) Head with modified vertex ( Fig. 2A ); antennomeres VIII–XI simple, lacking modifications ( Fig. 2B ); Southwest China: Guizhou. ................... T. abnormalis sp. nov.

– Head with simple vertex; antennomeres VIII–XI each modified. ........................... 3

3 (2) Aedeagus split at apex, ventral portion strongly broadened in lateral view ( Fig. 8D ); South China: Guangxi. .............................................................. T. kawadai sp. nov.

– Aedeagus split at apex, ventral portion narrowed toward apex in lateral view ( Fig. 9D ); South China: Guangxi. .......................................................... T. uenoi sp. nov.

4 (1) Metacoxae protuberant at ventral margins ( Fig. 4C ); Southwest Chiba: Guizhou. ... ................................................................................................... T. liboensis sp. nov.

– Metacoxae flat at ventral margins. ........................................................................... 5

5 (4) Metatrochanters modified, either with tuft of dense setae, or protuberant at ventral margins. ................................................................................................................... 6

– Metatrochanters simple. .......................................................................................... 7

6 (5) Metatrochanters with tuft of dense setae at ventral margins ( Fig. 6C ); Southwest China: Guizhou. .................................................................... T. xingyiensis sp. nov.

– Metatrochanters protuberant at ventral margins ( Fig. 10C ); North Thailand: Chiang Mai. ..................................................................................... T. thailandicus sp. nov.

7 (5) Metaventrite with setae sparse or clustered, not arranged in rows. ......................... 8

– Metaventrite with setae arranged in two distinct rows. ......................................... 10

8 (7) Apical split of aedeagal median lobe with dorsal portion much longer than ventral portion in lateral view ( YIN et al. 2011a: Fig. 6 ); South China: Guangxi. .................. ......................................................................................... T. bedosae Yin & Li, 2011

– Apical split of aedeagal median lobe with dorsal portion much shorter than ventral portion in lateral view. ............................................................................................. 9

9 (8) Antennomeres XI relatively stouter ( Fig. 11B ); metaventrite with sparse setae not clustered ( Fig. 11D ); South China: Guangxi. ............ T. deharvengi Yin & Li, 2011

– Antennomeres XI relatively slenderer ( Fig. 3B ); metaventrite with clustered setae ( Fig. 3C ); Southwest China: Guizhou. ................................ T. cehengensis sp. nov.

10 (7) Rows of setae short, present only at posterior half of metaventrite ( Fig. 7C ); South China: Guangxi. ............................................................................. T. bama sp. nov.

– Rows of setae extending throughout at least 2/3 length of metaventrite ( Figs 1C , 5C ). ........................................................................................................................ 11

11 (10) Head and pronotum slightly wider than long, HL/HW and PL/PW <1 ( Fig. 1A ); Central China: Hubei. ............................................................ T. hubeiensis sp. nov.

– Head slightly longer than wide, HL/HW> 1, pronotum about as long as wide, PL/ PW ≈ 1 ( Fig. 5A ); Southwest China: Guizhou. ................ T. setosiventris sp. nov.

Figures

Fig. 13. Distribution of the Tribasodites bedosae species-group in China (A) and Thailand (B).

Fig. 11. Antennae (A, B) and metaventrite (C, D) of Tribasodites bedosae Yin & Li, 2011 (A, C) and T. deharvengi Yin & Li, 2011 (B, D). Scales: A, B = 0.2 mm; C, D = 0.5 mm.

Fig.2. Tribasodites abnormalis sp. nov., male.A – habitus.B – left antenna. C – meso- and metaventrite.D – aedeagus, in lateral view. E – aedeagus, in ventral view. Scales: A = 1.0 mm; C = 0.5 mm; B, D, E = 0.2 mm.

Fig.8. Tribasodites kawadai sp. nov., male.A – habitus. B – left antenna. C – meso- and metaventrite.D – aedeagus, in lateral view. E – aedeagus, in ventral view. Scales: A = 1.0 mm; C = 0.5 mm; B, D, E = 0.2 mm.

Fig. 9. Tribasodites uenoi sp. nov., male. A – habitus. B – left antenna. C – meso- and metaventrite. D – aedeagus, in lateral view. E – aedeagus, in ventral view. Scales: A = 1.0 mm; C = 0.5 mm; B, D, E = 0.2 mm.

Fig. 4. Tribasodites liboensis sp. nov., male.A – habitus. B – left antenna.C – meso- and metaventrite. D – aedeagus, in lateral view. E – aedeagus, in ventral view. Scales: A = 1.0 mm; C = 0.5 mm; B, D, E = 0.2 mm.

Fig.6.Tribasodites xingyiensis sp. nov., male.A – habitus.B – left antenna.C – meso- and metaventrite.D – aedeagus, in lateral view. E – aedeagus, in ventral view. Scales: A = 1.0 mm; C = 0.5 mm; B, D, E = 0.2 mm.

Fig. 10. Tribasodites thailandicus sp. nov., male.A – habitus. B – left antenna. C – meso- and metaventrite. D – aedeagus, in lateral view. E – aedeagus, in ventral view. Scales: A = 1.0 mm; C = 0.5 mm; B, D, E = 0.2 mm.

Fig. 3. Tribasodites cehengensis sp. nov., male. A – habitus. B – left antenna. C – meso- and metaventrite. D – aedeagus, in lateral view. E – aedeagus, in ventral view. Scales: A = 1.0 mm; C = 0.5 mm; B, D, E = 0.2 mm.

Fig. 7. Tribasodites bama sp. nov., male.A – habitus. B – left antenna. C – meso- and metaventrite. D – aedeagus, in lateral view. E – aedeagus, in ventral view. Scales: A = 1.0 mm; C = 0.5 mm; B, D, E = 0.2 mm.

Fig. 1. Tribasodites hubeiensis sp.nov., male.A – habitus. B – left antenna.C – meso- and metaventrite.D – aedeagus, in lateral view. E – aedeagus, in ventral view. Scales: A = 1.0 mm; C = 0.5 mm; B, D, E = 0.2 mm.

Fig. 5. Tribasodites setosiventris sp. nov., male. A – habitus. B – left antenna. C – meso- and metaventrite. D – aedeagus, in lateral view. E – aedeagus, in ventral view. Scales: A = 1.0 mm; C = 0.5 mm; B, D, E = 0.2 mm.