Thliptoceras bicuspidatum Zhang

Zhang, Dandan, Xu, Jiawen & Li, Jinwei, 2014, Review of the genus Thliptoceras Warren, 1890 (Lepidoptera: Crambidae: Pyraustinae) from the Oriental region of China, Zootaxa 3796 (2), pp. 265-286 : 270

Thliptoceras bicuspidatum Zhang , sp. nov.

Figs. 19 , 32

DIagnosIs. Thliptoceras bicuspidatum is closely related to T. gladialis , with conical frons, similar wing pattern and male genitalia, and the narrow, modified wings of the artatalis group in the male, but it can be distinguished by the modified antennal base in the male, a medially deeply concave V-shaped juxta, an almost square valva apex with a second minute spine on ventrodistal angle, a tubular anellus with 2 invaginated lobe-shaped sclerotizations bearing 4 low carinae.

DescrIptIon. Head. Frons conically projecting, pale fuscous, or pale yellowish fuscous, with white lateral bands. Vertex pale fuscous, medially much paler. Labial palpus exceeding frons by a little less than length of head; brown, contrastingly white at base ventrally. Maxillary palpus brown, with tip paler. Basal scaling of proboscis creamy white. Antenna scape in male elongated by dorsal scales forming a big distally extended tooth, pedicel and basalmost flagellum segments compressed dorsally, forming a short deep sinus; fuscous, with pale fuscous scales dorsally. Thorax. Tegula pale fuscous. Legs pale fuscous dorsally, dirty white ventrally; hind tibia with inner midspur longer than other inner spurs and outer mid-spur minute in male, other outer spurs about half length of inner. Wing expanse 28 mm. Forewing pale grey fuscous, markings fuscous; reniform stigma a short streak; postmedial line with anterior 4/5 distinct, arched from 2/3 costa to middle of CuA2; fringe fuscous, distal half paler. Hindwing translucent whitish at base and along costa; postmedial line similar as in forewing; fringe as forewing, paler at tornal region. Abdomen. Pale fuscous dorsally, dirty white ventrally. Male genitalia. Uncus narrowly triangular, distal half curved, setose dorsolaterally except apex. Valva simple, narrow, long and nearly parallel-sided with truncate, squared apex with a minute spine-shaped process at both dorsodistal and ventrodistal corners; editum slender and long, gently bent dorsad, apex slightly inflated and with sparse, long and short setae; sacculus with a low and round process medially, sparsely setose distally. Juxta nearly V-shaped, with arms curved and tapering to the tips. Anellus developed, tubular, with 2 invaginated lobe-shaped sclerotizations with 4 low carinae (attached to aedeagus in Fig. 32 ). Aedeagus weakly bent at 1/3, without cornuti.

Female unknown.

MaterIal examIned. Holotype: ♂, CHINA, Guangdong: Mt. Danxiashan (25°04'N, 113°64'E), Shaoguan County, alt. 96 m, 7.VII.2012, coll. Li Jinwei, genitalia slide No. XJW12006; Paratype: Guangdong: 1 ♂, Yanshuitian, Mt. Heishiding (23°27'N, 111°54'E), Fengkai County, 3.VI.2011, coll. Chen Haidong and Tong Bo, genitalia slide No. ZDD10067.

DIstrIbutIon. China (Guangdong).

Etymology. The specific name is derived from the Latin bicuspidatus = two pointed, referring to the valva with two pointed processes at distal end.

Figures

FIGURES 15 – 22. Adults of Thliptoceras spp. 15 – 16. T. artatalis. 15, ♂, Mt. Tianmushan; 16, ♀, Mt. Danxiashan. 17 – 18. T. gladialis. 17, ♂, Yingde; 18, ♀, Yingde. 19. T. bicuspidatum sp. nov. ♂, holotype. 20. T. semicirculare sp. nov. ♂, holotype. 21 – 22. T. bisulciforme sp. nov. 21, ♂, paratype, Xing’an; 22, ♀, paratype, Xing’an.

FIGURES 30 – 32. Male genitalia of Thliptoceras spp., with enlarged detail of base part of valva (top right). 30. T. artatalis. genitalia slide no. ZDD 12007 (anellus attached to aedeagus). 31. T. gladialis. genitalia slide no. ZDD 10065 (image reversed). 32. T. bicuspidatum sp. nov. paratype, genitalia slide no. ZDD 10067 (anellus attached to aedeagus).