Lasinus mandarinus Raffray, 1890

Bekchiev, Rostislav, Hlavac, Peter & Nomura, Shuhei, 2013, A taxonomic revision of Tyrini of the Oriental region. V. Revision of the genus Lasinus Sharp, 1874 (Coleoptera, Staphylinidae, Pselaphinae), ZooKeys 340, pp. 21-42 : 24

Lasinus mandarinus Raffray, 1890 Fig. 1

Lasinus mandarinus Raffray, 1890: 212, Pl. III, fig. 16.

Type locality.

Tonkin (Ha Noi, Vietnam).

Material examined

(4 ♀♀). LECTOTYPE, ♀, here designated: (h) Tonkin / red label (p) TYPE / (h) Lasinus mandarinus (p) A. Raffray det. / (p) MUSÉUM PARIS, 1917, COLL. A. RAFFRAY / red label (p) LECTOTYPE Lasinus mandarinus Raffray, Bekchiev, Hlaváč & Nomura des., 2013. (MNHN). PARALECTOTYPES, 3 ♀♀: same data as lectotype, bearing the following red label: (p) PARALECTOTYPE Lasinus mandarinus Raffray, Bekchiev, Hlaváč & Nomura des., 2013. (MNHN).

Lectotype designation.

Redescription of this species given below is based on four females deposited in MNHN having a status of syntypes. Raffray (1890) also mentioned four females in his original description. One female is here designated as lectotype, and three remaining females paralectotypes, in order to ensure the stability of nomenclature and provide a unique name-bearing type for Lasinus mandarinus .

Description.

Body (Fig. 1) unicoloured, dark brown, maxillary palpi yellow, length 3.30-3.60 mm.

Head elongate, about 1.15 times longer than wide, slightly longer than pronotum; median sulcus well-defined along whole length of head. Genae simple, without protuberance.

Antennae very long, about 2.3-2.4 mm; scapes about 5 times longer than pedicels, pedicels short, as long as wide; antennomeres III–VII subequal in length, slightly shorter than V; antennomeres VI–VIII about as long as pedicels; IX slender, 2.25 times longer than wide, 1.10 times as long as X; late about 1.6 times longer than wide; terminal segments 1.2 times as long as X and 1.6 times longer than wide.

Pronotum as long as wide, gibbose, with prominent lateral swellings before lateral foveae; lateral and median setose foveae well-defined; median sulcus originates in median fovea and almost reaching anterior margin of pronotum.

Legs long and slender; protrochanters with small apical spine; profemora with long spine before middle; mesotrochanters at apex with two spines, outer one fairly bigger; mesofemora with minuscule spine at basal third.

First visible abdominal tergite (IV) glabrous, slightly more than two times longer than second (V); short basal carinae well-defined, distance between carinae 0.4 of maximal tergal width.

Differential diagnosis.

Lasinus mandarinus is close to Lasinus sinicus by the pronotum with prominent lateral swellings before lateral foveae, but it differs from the latter by the proportion of antennomere X which is 1.6 times as long as wide.

Distribution.

Vietnam (Tonkin, Ha Noi).