Lasinus spinosus Sharp

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 : 25-27

Lasinus spinosus Sharp Figs 2, 11, 20

Lasinus spinosus Sharp, 1874: 106.

Lasinus spinosus Sharp: Waterhouse 1882, 90: pt. 21, pl. 146, fig. 3.

Type locality.

Nagasaki, Suwo-sama (=Suwa shrine).

Type material examined.

LECTOTYPE, ♂, here designated: (h) Lasinus spinosus . Type D.S. Japan. Lewis. [label where the type specimen was originaly mounted] / (h) Lasinus spinosus ♂ (p) TYPE (h) D. S. / (p) Japan. G. Lewis / round label with red margin (p) TYPE / round label with blue margin (p) SYNTYPE / (p) Sharp Coll. 1905-313. / red label (p) LECTOTYPE Lasinus spinosus Sharp, Bekchiev, Hlaváč & Nomura, des., 2013 (BMNH). PARALECTOTYPE, 1 ♀, here designated: (h) Lasinus spinosus ♀ (p) TYPE (h) D. S. / (p) Japan. G. Lewis / round label with blue margin (p) SYNTYPE / red label (p) PARALECTOTYPE Lasinus spinosus Sharp, Bekchiev, Hlaváč & Nomura, des., 2013 (BMNH).

Other material examined.

(8 ♂♂, 9 ♀♀). (1 ♂) Japan, Saga Pref., Kashima City, Mt. Kyogatake., 19.X.1986, S. Nomura leg.; (1 ♂) Japan, Fukuoka Pref., Hiko-san Mts., 3.V.1983, S. Nomura leg.; (1 ♂) Japan, Kumamoto Pref., Ueki-cho, 10.IV.1981, S. Naomi leg.; (1 ♂, 1 ♀) Japan, Kyushu, Nagasaki Pref., Isahaya-shi, Jôyama, Atagoyama, 18.III.1998, S. Nomura leg.; (1 ♂) Japan, Kyushu, Oita Pref., Shonai-machi, Nishi-Ohara, 20.VI.1998, K. Ôtsuka leg.; (1 ♂, 1 ♀) Japan, Kyushu, Miyazaki Pref., Tano-cho, Aoidake, 6.IX.1993, S. Nomura leg.; (1 ♂, 1 ♀) Japan, Fukuoka, Hikosan Mts., 27.XII.1982, S. Nomura leg.; (1 ♂, 1 ♀) Japan, Nagasaki City, Suwa Shrine, 2.V.1985, S. Nomura leg.; (1 ♀) Japan, Miyazaki Pref., Kiyotake-cho, Kaeda vall., 27.IV.1993, S. Nomura leg.; (2 ♀♀) Japan, Miyazaki Pref., Aya-Minami, 9.V.1985, S. Nomura leg.; (2 ♀♀) Japan, Kyushu, Oita Pref., Kujû Mts., Makinoto pass., 14.X.1991, S. Nomura leg. (NSMT, PCPH, NMNH, PCSK).

Lectotype designation.

Redescription of this species given below is based on one male and one female deposited in BMNH having a status of syntypes. Sharp (1874) mentioned three specimens in his original description. One male is here designated as lectotype, another female is paralectotype, in order to ensure the stability of nomenclature and provide a unique name-bearing type for Lasinus spinosus .

Description.

Body (Fig. 2) unicoloured, reddish-brown, maxillary palpi yellow, length 2.90-3.10 mm.

Head elongate, about 1.15 times longer than wide, slightly longer than pronotum; median sulcus visible on rostrum and on vertex reaching level of vertexal foveae. Genae with weak protuberance, covered with erected, dense golden setae.

Antennae about 2.02 mm long (Fig. 11); scapes long, about 3.7 times longer than pedicels; pedicels about 1.18 times shorter than antennomeres III; antennomeres IV and V as long as wide; antennomeres VI 1.22 times shorter than pedicels; antennomeres VII 1.25 times shorter than VI; antennomeres VIII about 1.27 times longer than and distinctly wider than VII; IX about 1.5 times longer than wide and about same length as terminal antennomeres, IX in male with small and shallow discoidal plate on apical half bearing small pore-like structure with one long seta, in female unmodified; antennomeres X quadrate, 1.5 times shorter than IX; terminal antennomeres 1.6 times longer than X and about 1.5 times longer than wide.

Pronotum about as wide as long, wrinkly, evenly rounded before lateral foveae; lateral and median setose foveae well-defined; median longitudinal sulcus very thin, but distinct.

Legs long and slender; protrochanters with large apical spine; profemora with long spine in middle of its length; mesotrochanters at apex with one small (male) or two (female) spines, in some cases one spine is slightly stronger; mesofemora with minuscule spine at basal third.

Abdomen slightly wider than elytra, first visible abdominal tergite (IV) finely punctate with dense and short golden setae, about 4 times as long as next tergite, basal carinae very short, distance between carinae 0.4 of maximal tergal width. Aedeagus (Fig. 20) 0.64 mm long; median lobe weakly narrowed apically, with short and large apical lobe; endophallus with two spines and one lamella; dorsal spine very big, enlarged at apex, forming large plate; ventral spine long, acute at apex; lamella small finely dentate in apical part; parameres short and slender, not overlapping apical lobe.

Differential diagnosis.

Lasinus spinosus shares with Lasinus monticola , Lasinus mikado , Lasinus inexpectatus , Lasinus saoriae and Lasinus yamamotoi the evenly rounded pronotal lateral margins, but differs from all of these species by the shape of the antennae and aedeagus.

Distribution.

Japan (Kyushu).