Ypsiloncyphon garoensis, Yoshitomi, Hiroyuki, 2015

Yoshitomi, Hiroyuki, 2015, New species of the genus Ypsiloncyphon (Insecta: Coleoptera: Scirtidae: Scirtinae), Zootaxa 3904 (4), pp. 451-500 : 463-464

Ypsiloncyphon garoensis sp. n.

( Figs. 1 H, 10)

Type material. Holotype ( NMW): male, “NE-INDIA: Meghalaya W Garo Hills Nokrek NP; ca. 1100m ”, “ 25º29.6’N 90º19.5’E 9.- 17.5.1996 leg. Jendek & Sausa”, genit. s. no. HY 916. Paratype ( NMW): 1 male, “NE- INDIA: Meghalaya W Garo Hills Balphakram NP”, “ 25º11’N 90º51’E 22.- 27.5.1996 leg. Jendek & Sausa”, genit. s. no. HY 911.

Description. Male. Body ( Fig. 1 H) oval, slightly convex dorsally, shiny, closely covered with silver setae. Coloration of head, scutellar shield, elytra, meso- and metaventrites, abdomen and hind femur blackish-brown; pronotum reddish-brown (holotype) to brown (paratype); antennae, mouthparts, legs (except for hind femur) yellowish-brown.

Head moderate in size, almost flat dorsally, front margin of clypeus concave. Eyes large, prominent; the distance between eyes about 1.5 times as long as the maximum diameter of an eye. Pronotum finely punctate, depressed in lateral parts; anterior margin straight; lateral and posterior margins gently arcuate; antero- and postero-lateral corners obtuse; PW/PL 2.29–2.43 (2.36). Scutellar shield relatively small, finely punctate, equilaterally triangular. Elytra oblong-oval, widest at the middle, densely punctate; humeral parts slightly projecting dorsally; apices right-angled; EL/EW 1.29–1.45 (1.37); EL/PL 4.43–4.60 (4.51); EW/PW 1.30–1.50 (1.40); TL/EW 1.58–1.77 (1.68).

Caudal margin of sternite VII ( Fig. 10 A) arcuate. Tergite VIII ( Fig. 10 B) moderately sclerotized, with two large lateral lobes between which the caudal margin is deeply excised, with a small median projection, with a pair of long and slender apodemes; tergite IX ( Fig. 10 C) small, lightly sclerotized, trapezoidal, with a pair of long apodemes; sternite VIII ( Fig. 10 D) moderately sclerotized, elongate-triangular. Tegmen ( Fig. 10 E) moderately sclerotized, Y-shaped, bifid in apical 1/3 (parameres), pointed at apices. Penis ( Fig. 10 F) lightly sclerotized, about 1.2 times as long as tegmen; sides of pala subparallel, pala gently tapering anteriorly; parameroids concave in apical margin, sparsely punctate; trigonium indistinct.

Female. Unknown.

Measurements. Male (n = 2): TL 1.68 & 1.90 mm; PW 0.73 & 0.80 mm; PL 0.30 & 0.35 mm; EW 0.95 & 1.20 mm; EL 1.38 & 1.55 mm.

Distribution. India.

Remarks. This species is related to Ypsiloncyphon kedahensis sp. n. and Y. chiangmaiensis sp. n. judging from the tergite VIII having large lateral lobes and the penis with trigonium indistinct, and differs from them by the shapes of tergite VIII and penis.

Etymology. The species is named after the type locality.

Figures

FIGURE 1. Habitus of Ypsiloncyphon spp., holotype, male (except for K). A) Y. laosensis sp. n., B) Y. myanmarnus sp. n., C) Y. nomurai sp. n., D) Y. bifurcatus sp. n., E) Y. bicornutus sp. n., F) Y. borneensis sp. n., G) Y. brachytrigonium sp. n., H) Y. garoensis sp. n., I) Y. kedahensis sp. n., J) Y. prolongatus sp. n., K) Y. mendosus (Klausnitzer, 1980), non-type specimen, male. Scales: 1.0 mm.

FIGURE 10. Ypsiloncyphon garoensis sp. n., holotype, male. A) sternites V – VII, B) tergite VIII, C) tergite IX, D) sternite VIII, E) tegmen, F) penis in ventral view.