Four new species of Pselaphodes Westwood (Coleoptera: Staphylinidae: Pselaphinae) from Thailand, Laos, and China Author Huang, Meng-Chi Author Li, Li-Zhen Author Yin, Zi-Wei text Zootaxa 2018 2018-09-07 4472 1 100 110 journal article 29460 10.11646/zootaxa.4472.1.4 c9530452-3087-42e5-98e2-22b314d6380f 1175-5326 1440024 26A55B47-2878-4BF2-8162-F5517C9247DA Pselaphodes suthepensis , new species ( Figs 5A , 6 ) Type material (1 ex.). Holotype : THAILAND : ♂ , ‘ THAILAND : Chie(a!)ng Mai Province, Doi Suthep N.P.: Konthathan 6(00)– 700 m , 26.ix.1981 , Zool. Museum Copenhagen leg.’ ( ZMUC ). Diagnosis of male. Length 2.98 mm ; antennomere IX with a disc-shaped process at apex; metaventral processes long, apically expanded; protibia with large apical spine. Aedeagal median lobe extended, strongly constricted at apical 1/4 (in lateral view). FIGURE 3. Aedeagus of Pselaphodes femoralis , showing intraspecific variation (A, C, E, G, I, K in dorsal view; B, D, F, H, J, L in lateral view). A–B. Population from Zhejiang, China. C–D. Population from Fujian, China. E–F . Population from Guangdong, China. G–H. Population from Guangxi, China. I–J . Population from Chiang Dao, Thailand. K–L. Population from Chiang Mai, Thailand. Scale bars: 0.2 mm. Description. Male ( Fig. 5A ). Body reddish brown, BL 2.98 mm . Head as long as wide, HL and HW 0.67 mm ; each eye composed of about 43 facets; with well-developed ocular canthus. Antennomeres IX–XI ( Fig. 6A ) forming distinct club, antennomere X with long setae at inner basal corner, antennomere IX with slightly raised, setose area at apicomesal margin ( Fig. 6A , indicated by arrows). Pronotum ( Fig. 6B ) wider than long, PL 0.60 mm , PW 0.66 mm , rounded at anterolateral margins. Elytra wider than long, EL 0.87 mm , EW 1.12 mm . Metaventral processes ( Fig. 6C ) long, apically expanded. Protrochanter and profemur ( Fig. 6D ) spinose ventrally; protibia ( Fig. 6E ) with distinct triangular apical spine; mesotrochanter ( Fig. 6F ) with small ventral spur, mesofemur ( Fig. 6F ) broadly thickened ventrally; metatrochanter and metafemur ( Fig. 6G ) simple. Abdomen broad at base and narrowed apically, AL 0.84 mm , AW 1.17 mm . Sternite IX ( Fig. 6H ) semi-membranous. Length of aedeagus ( Fig. 6I –K ) 0.66 mm ; median lobe asymmetric, strongly constricted at apical 1/4 (in lateral view), parameres elongate, strongly setose at apical half. Female. Unknown. FIGURE 4. Male diagnostic features of Pselaphodes incisus . A. Antennal club. B. Pronotum. C. Metaventral process, in lateral view. D. Protrochanter and profemur. E. Apex of protibia. F. Mesotrochanter and mesofemur. G. Metatrochanter and metafemur. H. Sternite IX. I–K. Aedeagus in dorsal (I, K), and lateral (J) view; I–J: population from Yunnan, China, K: population from Attapeu, Laos. Scale bars: 0.3 mm in A–B, D, F – G; 0.2 mm in C, I–K; 0.1 mm in E, H. FIGURE 5. Dorsal habitus of Pselaphodes males. A . P . suthepensis . B. P . thailandicus . Scale bars: 1 mm. Distribution. Thailand : Chiang Mai . Comparative notes. Pselaphodes suthepensis can be separated from all other species by the uniquely modified antennomeres IX–X, the long, apically expanded metaventral processes, a large apical projection of the protibia, and a different shape and structure of the aedeagal median lobe and endophallus. Etymology. The specific epithet refers to the type locality of the new species, i.e. , Doi Suthep.