Pselaphodes thailandicus, Huang & Li & Yin, 2018

Huang, Meng-Chi, Li, Li-Zhen & Yin, Zi-Wei, 2018, Four new species of Pselaphodes Westwood (Coleoptera: Staphylinidae: Pselaphinae) from Thailand, Laos, and China, Zootaxa 4472 (1), pp. 100-110 : 107-110

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Pselaphodes thailandicus

new species

Pselaphodes thailandicus , new species

( Figs 5B View FIGURE 5 , 7 View FIGURE 7 )

Type material (9 exs). Holotype: THAILAND: ♂, ‘ THAILAND: Chiang Mai, Doi Inthanon , 2500 m, 9.XI.1985, Burckhardt-Löbl’ ( MHNG) . Paratypes: THAILAND: 4 ♂♂, 2 ♀♀, same label data as holotype ( MHNG) ; 1 ♂, ‘ Thailand, Doi Inthanon Nat. Park, Chomthong Dist. , 2300 m, 29.8.1990, P. Schwendinger’ ( MHNG) ; 1 ♂, ‘ THAILAND, 23.V.87, prov. Chiang Mai, Doi Inthanon, 2300 m, P. Schwendinger’ ( MHNG).

Diagnosis of male. Length 2.93–2.94 mm; antennomere IX lacking a disc-shaped process at apex; profemur with a large, blunt projection at ventral margin; metatibia slightly expanded near the apices, with a preapical setose tuft and spine.

Description. Male ( Fig. 5B View FIGURE 5 ). Body reddish brown, BL 2.93–2.94 mm. Head about as long as wide, HL 0.59– 0.60 mm, HW 0.60–0.61 mm; each eye composed of about 30 facets; ocular canthus well-developed.

Antennomeres IX–XI ( Fig. 7A View FIGURE 7 ) enlarged, forming distinct club. Pronotum ( Fig. 7B View FIGURE 7 ) longer than wide, PL 0.65– 0.69 mm, PW 0.60–0.61 mm, rounded at anterolateral margins. Elytra wider than long, EL 0.76–0.79 mm, EW 1.07–1.10 mm. Metaventral processes ( Fig. 7C View FIGURE 7 ) short. Protrochanter ( Fig. 7D View FIGURE 7 ) with small but distinct ventral spine, profemur ( Fig. 7D View FIGURE 7 ) with large, blunt ventral projection; protibia ( Fig. 7E View FIGURE 7 ) with small, blunt projection near middle; mesotrochanter ( Fig. 7F View FIGURE 7 ) with small ventral spine, mesofemur broadly thickened ventrally; metatrochanter and metafemur simple ( Fig. 7G View FIGURE 7 ); metatibia ( Fig. 7H View FIGURE 7 ) with preapical setose tuft and spine. Abdomen broad at base and narrowed apically, AL 0.87–0.92 mm, AW 1.12–1.15 mm. Sternite IX ( Fig. 7I View FIGURE 7 ) semi-membranous. Length of aedeagus ( Fig. 7J–L View FIGURE 7 ) 0.51 mm; median lobe broadened throughout length in lateral view, curved leftward at apex in dorsal view, parameres paired, almost symmetrical.

Female. Similar to male in general; each eye composed of about 30 facets; antennae and legs simple. Measurements: BL 2.84–2.86 mm, HL 0.56–0.60 mm, HW 0.57–0.61 mm, PL 0.63–0.64 mm, PW 0.57–0.59 mm, EL 0.71–0.74 mm, EW 1.07–1.12 mm, AL 0.89–0.93 mm, AW 1.25–1.26 mm.

Distribution. Thailand: Chiang Mai.

Comparative notes. The new species is most similar to P. aculeus Yin, Li & Zhao by the presence of a subapical spine on the metatibia, and a similar form of the aedeagus. These two species may be separated primarily by the absence of a disc-like process of antennomere IX, and a less expanded subapical portion of the metatibia in P. thailandicus , whereas in different populations of P. aculeus there is always a disc-like process near the apex of the antennomere IX, and the metatibia is notably thickened in apical portion ( Yin et al. 2010, 2011).

Etymology. The specific name refers to the country where the species was found.


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