Ypsiloncyphon teruhisai, Yoshitomi, Hiroyuki, 2015

Yoshitomi, Hiroyuki, 2015, New species of the genus Ypsiloncyphon (Insecta: Coleoptera: Scirtidae: Scirtinae), Zootaxa 3904 (4), pp. 451-500 : 487-489

Ypsiloncyphon teruhisai sp. n.

( Figs. 26 G, 26H, 30, 31)

Type material. Holotype ( ITBC), male, “Poring Park, Ranau, Sabah, Borneo Malaysia 24. III. 2008 H. Takizawa leg.”. Paratypes ( ITBC, EUMJ, SEHU): 1 male & 1 female, dame data and collector as for the holotype, but “9, 10. I. 2009 ”; 1 female, “Borneo, Sabah Mt. Kinabalu ParkHead Quarter 22. III. 1989 K. Matsumoto leg.”, genit. s. no. HY 1032; 1 male, “[E. Malaysia] Poring Hot Spring (alt. 600 m) Sabah, Is. Borneo 20–26. iii. 1993 T. Ueno leg.”, genit. s. no. HY 768; 1 female, “ UMS hill, Kota Kinabalu, Sabah, BORNEO 12. V. 2007 H. Takizawa leg.”; 1 male, “Mahua Waterfall, Tambunan, Sabah BORNEO 22-24. VI. 2007 H. Takizawa leg.”; 1 female, “Kg. Madsiang, Penampang, Sabah, BORNEO 10. VII. 2007 H. Takizawa leg.”; 1 female, “Kg. Mong Kuslad, Moyog. Penampang Sabah, BORNEO 22. VII. 2007 H. Takizawa leg.”; 2 females, same locality and collector, but “ 13. I. 2008 ”; 1 male, same locality and collector, but “ 13. IX. 2008 ”; 1 female, “Aru Dalan, Bario, Kelambit, highland, Sarawak, Malaysia 6. IX. 2007 H. Takizawa leg.”; 3 males, “Bundu Tuhan, Ranau, Sabah BORNEO 1. III. 2008 H. Takizawa leg.”; 1 male & 1 female, “Mamut, Ranau, Sabah Borneo, Malaysia 2. III. 2008 H. Takizawa leg.”; 1 male, “Kg. Guramboi, 43km Penampang, Sabah, Borneo 15. III. 2008 H. Takizawa leg.”; 1 female, “Ridon, Lanjak Entimau wildlife Sanct., Kapit, Sarawak 18. VI. 2008 H. Takizawa leg.”; 1 female, “Manggis Subst., Kinabalu Park, Ranau, Sabah, BORNEO 9-10. XII. 2008 H. Takizawa leg.”.

Description. Male. Body ( Fig. 26 G) oblong, convex dorsally, shining, closely covered with yellowish-white setae throughout. Coloration of body almost blackish-brown, but antennomeres II–III brown.

Head moderate in size, slightly convex dorsally, sparsely punctate, almost straight in front margin. Eyes large, prominent; the distance between eyes about 1.7 times as long as the maximum diameter of an eye. Antennae relatively long, reaching about proximal 1/3 of elytra. Pronotum densely punctate; front and lateral margins almost straight; antero-lateral angles obtuse, slightly produced anteriorly; postero-lateral angles rectangular; PW/PL 1.92–2.20 (2.07). Scutellar shield subtriangular, finely punctate. Elytra oblong, widest near the humeral parts, thence gently tapered apically; apices rectangular; EL/EW 1.58–1.69 (1.64); EL/PL 4.75–5.50 (5.15); EW/PW 1.39–1.61 (1.51); TL/EW 1.91–2.02 (1.96).

Caudal margin of sternite VII ( Fig. 30 A) arcuate. Tergite VIII ( Fig. 30 B) well sclerotized, wide, sparsely punctate in posterior part, projecting laterally in proximal part, with a pair of long and slender apodemes protruding from near antero-lateral corners; sternite VIII ( Fig. 30 C) well sclerotized, short, T-shaped; tergite IX ( Fig. 30 D) lightly sclerotized, trapezoidal, densely covered with short spines in posterior part, with a pair of very long apodemes protruding from near antero-lateral corners; sternite IX ( Fig. 30 E) well sclerotized, Y-shaped, bifid in apical 5/6, serrate in apical part, with pointed apex and long subterminal spine. Tegmen ( Fig. 30 F) long, well sclerotized, Y-shaped, shorter than sternite IX, bifid in apical 2/3, with pointed apices. Penis ( Fig. 30 G) long, well sclerotized, about 1.2 times as long as tegmen, widest at about proximal 2/3; pala gently tapered; parameroids simple, finely punctate; trigonium short, projecting from proximal 3/7 to 2/3, closely covered with fine serrations in apical part.

Female. Sexual dimorphism ( Fig. 26 H) distinct: coloration of elytra brown. PW/PL 2.00–2.26 (2.11); EL/EW 1.68–1.86 (1.74); EL/PL 5.20–6.40 (5.59); EW/PW 1.43–1.63 (1.52); TL/EW 2.00–2.15 (2.06). Caudal margin of sternite VII ( Fig. 31 A) arcuate. Tergite VIII ( Fig. 31 B) moderately sclerotized, elongate subtriangular, excised and bearing short spines in apical margin, sparsely punctate in apical part, with a pair of long and slender apodemes protruding from antero-lateral corners. Sternite VIII ( Fig. 31 C) moderately sclerotized, oblong, shallowly concave and bearing short spines in apical margin, punctate in apical part, with a long median apodeme. Ovipositor ( Fig. 31 D) very long, with a branch in apical 1/6 of baculus; approximate ratio of stylus, coxite and baculus (n = 1) as -: 20: 169; prehensor absent.

Measurements. Male (n = 10): TL 2.96–3.58 (3.23) mm; PW 1.00–1.20 (1.09) mm; PL 0.48–0.60 (0.53) mm; EL 2.48–2.98 (2.71) mm; EW 1.55–1.80 (1.65) mm. Female (n = 6): TL 3.07–3.22 (3.16) mm; PW 0.97–1.08 (1.01) mm; PL 0.43–0.50 (0.48) mm; EL 2.59–2.75 (2.68) mm; EW 1.48–1.60 (1.54) mm.

Distribution. Malaysia (Borneo).

Remarks. This species and Ypsiloncyphon gedensis sp. n. are remarkable species in the genus in having large (TL about 3.0 mm) and oblong bodies. The differences between them are given in the remarks for Y. gedensis sp. n. Etymology. This species is named after Mr. Teruhisa Uéno, who collected one of the paratypes.

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

FIGURE 31. Ypsiloncyphon teruhisai sp. n., paratype, female. A) sternites V – VII, B) tergite VIII, C) sternite VIII, D) ovipositor.