Ypsiloncyphon nepalensis, Yoshitomi, Hiroyuki, 2015

Yoshitomi, Hiroyuki, 2015, New species of the genus Ypsiloncyphon (Insecta: Coleoptera: Scirtidae: Scirtinae), Zootaxa 3904 (4), pp. 451-500 : 481-482

Ypsiloncyphon nepalensis sp. n.

( Figs. 13 L, 25)

Type material. Holotype ( BLKU): male, “(E. NEPAL) Basantapur (2300m) 27º07’N, 87º24’E May 5, 1972 Malaise Trap (2) Kyushu Univ. Col.”, s. no. HY 792.

Description. Male. Body ( Fig. 13 L) oblong, gently convex dorsally, lightly shining, closely covered with yellowish-white setae throughout. Coloration of body yellowish-brown, but head and ventral surface of thoraces darker.

Head moderate in size, slightly convex dorsally, finely punctate; clypeus with straight front margin. Eyes relatively small, prominent; the distance between eyes about 3.5 times as long as the maximum diameter of an eye. Antennae stout. Pronotum finely punctate; front margin almost straight; antero- and postero-lateral corners obtuse, slightly projecting anteriorly in antero-lateral corners; lateral margins arcuate; posterior margin bisinuous; PW/PL 2.14. Scutellar shield small, equilaterally triangular, punctate as in pronotum. Elytra oblong, widest at the middle, densely punctate; apices rectangular; humeral parts slightly projecting; EL/EW 1.53; EL/PL 5.46; EW/PW 1.67; TL/EW 1.81.

Caudal margin of sternite VII ( Fig. 25 A) arcuate. Tergite VIII ( Fig. 25 B) moderately sclerotized, trapezoidal, bearing short setae near postero-lateral corners, with a pair of short apodemes protruding from near antero-lateral corners; tergites VIII–IX and tegmen broken. Penis ( Fig. 25 C) short, well sclerotized, widest at base; parameroids rod-like in apical 1/3, sparsely punctate; pala oblong; trigonium short, projecting about proximal 5/9 to 7/9, lightly sclerotized, simply rod-like.

Female. Unknown.

Measurements. Male (n = 1): TL 1.81 mm; PW 0.60 mm; PL 0.28 mm; EW 1.00 mm; EL 1.53 mm.

Distribution. Nepal.

Remarks. This species is closely related to Ypsiloncyphon formosu s (Klausnitzer) known from India and Y. jiangxiensi s (Yoshitomi) known from China in the shape of the prolonged parameroids of the penis. However, this species is distinguished from the other two species in the simple finger-shaped trigonium of the penis (apically serrate in these two species).

Etymology. The species is named after the type locality.

Figures

FIGURE 13. Habitus of Ypsiloncyphon spp., holotype, male (except for F). A) Y. guamensis sp. n., B) Y. philippinensis sp. n., C) Y. panayensis sp. n., D) Y. chlorizanoides sp. n., E) Y. bicolor sp. n., F) Y. bicolor sp. n., paratype, female, G) Y. sumatranus sp. n., H) Y. acer sp. n., I) Y. nokrekensis sp. n., J) Y. boukali sp. n., K) Y. javanicus sp. n., L) Y. nepalensis sp. n. Scales: 1.0 mm.

FIGURE 25. Ypsiloncyphon nepalensis sp. n., holotype, male. A) sternites V – VII, B) tergite VIII, C) penis in ventral view.