Ypsiloncyphon lanigerus, Yoshitomi, Hiroyuki, 2015

Yoshitomi, Hiroyuki, 2015, New species of the genus Ypsiloncyphon (Insecta: Coleoptera: Scirtidae: Scirtinae), Zootaxa 3904 (4), pp. 451-500 : 494-495

Ypsiloncyphon lanigerus sp. n.

( Figs. 26 J, 35)

Type material. Holotype ( NMW): male, “ MALAYSIA Pahang/Johor Endau Rompin NP, 100m Salendang, 28. 2.- 12. 3. leg. Strba & Hergovits 1995”, genit. s. no. HY 904. Paratype ( NMW): 1 male, same data as for the holotype.

Description. Male. Body ( Fig. 26 J) oblong, slightly convex dorsally, shiny, closely covered with yellowishwhite setae. Coloration of body dark brown, but antennae, mouthparts and legs paler.

Head moderate in size, flattened dorsally, finely punctate, with straight front margin of clypeus. Eyes large, prominent; the distance between eyes about 1.9 times as long as the maximum diameter of an eye. Pronotum finely punctate, depressed dorsally in lateral parts; anterior and lateral margins straight; antero-lateral corners rightangled; postero-lateral corners about 120°; posterior margin bisinuous; PW/PL 2.37. Scutellar shield moderate in size, equilaterally triangular. Elytra oblong, widest at the middle, densely punctate; humeral parts slightly projecting dorsally; apices right-angled; EL/EW 1.48; EL/PL 4.93; EW/PW 1.41; TL/EW 1.78.

Abdominal sternites III–VII ( Fig. 35 A) closely covered with short setae; caudal margin of sternite VII arcuate. Tergite VIII ( Fig. 35 B) moderately sclerotized, but membranous in antero-lateral part, bearing short setae and spines in apical part, with a pair of long and slender apodemes; tergite IX ( Fig. 35 D) membranous, bearing short spines in apical part, with a pair of long and slender apodemes lightly sclerotized; sternite VIII ( Fig. 35 E) moderately sclerotized, small, peg-shaped; sternite IX ( Fig. 35 C) almost membranous, inversely U-shaped. Tegmen ( Fig. 35 F) small, well sclerotized, Y-shaped. Penis ( Fig. 35 G) long, moderately sclerotized, very specialized, asymmetrical; pala oblong, subparallel-sided, with arcuate basal margin; posterior part (possibly parameroids) membranous, closely covered with many plicae, with long spines in apical part; trigonium very short, triangular.

Female. Unknown.

Measurements. Male (n = 1): TL 1.78 mm; PW 0.71 mm; PL 0.30 mm; EW 1.00 mm; EL 1.48 mm.

Distribution. Malaysia (Peninsular).

Remarks. This is a very specialized species in having an asymmetrical penis. Judging from the external features and the shape of the tegmen, this species is included in this genus.

Etymology. This species name, latin “ lanigerus ” = wool bearing, refers to the long spines in the apical part of the penis.

Figures

FIGURE 26. Habitus of Ypsiloncyphon spp., holotype, male (except for C, F, H, I). A) Y. wallacei sp. n., B) Y. chiangmaiensis sp. n., C) Y. luteoapicalis (Ruta, 2007), non-type specimen, male, D) Y. flexus sp. n., E) Y. gedensis sp. n., F) Y. gedensis sp. n., paratype, female, G) Y. teruhisai sp. n., H) Y. teruhisai sp. n., paratype, female, I) Y. micans (Klausnitzer, 1973), non-type specimen, male, J) Y. lanigerus sp. n., K) Y. cervus sp. n. Scales: 1.0 mm.

FIGURE 35. Ypsiloncyphon lanigerus sp. n., holotype, male. A) abdominal sternites I – VII, B) tergite VIII, C) sternite VIII, D) tergite IX, E) sternite IX, F) tegmen, G) penis in ventral view.