Peratophyga recta Jiang, Xue & Han

Jiang, Nan, Xue, Dayong & Han, Hongxiang, 2012, A review of Peratophyga Warren, 1894 in China, with descriptions of two new species (Lepidoptera: Geometridae, Ennominae), Zootaxa 3478, pp. 403-415 : 411-412

Peratophyga recta Jiang, Xue & Han sp. nov.

Figs. 11, 12 , 24 , 31 , 38

Description. Head. Antennae pale yellow dorsally, filiform in both sexes. Frons dark brown, upper margin yellow, not protruding. Labial palpi dark brown, extending slightly beyond frons. Vertex yellow. Thorax. Patagia yellow. Tegula and dorsum black. Hind tibia with two pairs of spurs in both sexes, dilated and with hair-pencil in male. Forewing length: male 8–9 mm; female 9–10 mm. Outer margins of all wings smooth. All wings pale yellow, black between bases and medial lines and between postmedial lines and outer margins. Forewing with a wavy yellow band present on basal half of costa; medial line black, almost straight; postmedial line black, wavy, often protruding inwards among M veins and below CuA2; fringes black; hindwing without a wavy yellow band on costa; protrusions among M veins and below CuA2 of postmedial line less distinct than those on forewing; other striations similar to those of forewing. Underside similar to upperside, discal spot of forewing short and linear, more distinct than that of upperside. Forewing with a basal elliptical fovea in male; M2 arising from above middle of discocellulars, close to M1. Abdomen. Abdominal segments blackish brown. Tuft of scales present on male sternite III. Male genitalia. Uncus triangular, narrowed apically, with setae dorsally. Gnathos with short and very broad, rounded apically median process. Valva with slightly broadened medially dorsal process, terminal half gently curved outwards and bearing long setae; ventral lobe almost triangular, spinous in terminal half, pointed distally. Juxta short and broad, almost triangular terminally. Saccus short and broad, rounded. Aedeagus short with two thorn-like processes near terminal part at one side, (subapical one smaller); vesica without cornuti. Female genitalia. Lamella postvaginalis narrow and short, strongly sclerotized, posterior margin slightly concave; lamella antevaginalis broad and band-like, weakly sclerotized. Ostium bursae sclerotized laterally. Ductus bursae sclerotized posteriorly, barely differentiated from corpus bursae. Corpus bursae elliptical; signum almost triangular, without marginal spines in anterior half.

Diagnosis. This species can be separated from P. bifasciata on the basis of following characters: the wavy yellow band is present on the basal half of the forewing costa; the basal area of hind wing is black, while it is pale yellow in P. bifasciata ; the forewing submarginal line forms a pale yellow patch on the costa in P. bifasciata , which is absent in P. re ct a sp. nov. The male genitalia differ from those of P. bifasciata as follows: the median process of the gnathos is broader and shorter; the dorsal process of the valva is broadened medially and not angled in the basal quarter; the ventral lobe of the valva is spinous in terminal half, which has several small spines distally and a small rounded process at the base of the dorsal margin in P. bifasciata ; the saccus is rounded, while in P. bifasciata , it bears a small nipple-like protrusion; the aedeagus has two thorn-like processes, which is absent in P. bifasciata ; the vesica has no cornuti, while in P. bifasciata , it has two cornuti, one a stout spine-like process, the other an oblong scobinate sclerite with small spines terminally. The female genitalia differ from those of P. bifasciata in the following characters: the lamella postvaginalis is much smaller and more strongly sclerotized, while in P. bifasciata , it is almost semicircular and concave at the middle of the posterior margin; the lamella antevaginalis is broad and band-like, rather than a pair of oval lobes in P. bifasciata ; the ostium bursae is strongly sclerotized laterally, but not sclerotized in P. bifasciata ; the signum is almost triangular in the anterior half, while in P.

bifasciata , it is almost quadrate. The male genitalia of the species are also similar to P. flavomaculata (Borneo) , but it can be distinguished by the following characters: the terminal part of the uncus is narrower; the median process of the gnathos and the medial part of the dorsal process of the valva are broader; the ventral lobe of the valva and the saccus are shorter.

Material examined. Holotype, Ƌ, CHINA: Yunnan ( IZCAS): Ruili, Dengga, 980 m, 6–8.VI.1992, coll. Xue Dayong. Paratypes: Guangxi ( IZCAS): 1Ƌ, Longrui, 18.V.1984, coll. Song Shimei; 1Ƌ, Fangcheng, Banba, 550 m, 4.VI.2000, coll. Yao Jian. Yunnan ( IZCAS): 1Ƌ, Mangshi, 1200 m, 5.V.1980, coll. Gao Ping; 2Ƌ, Ruili, Dengga, 980 m, 6–8.VI.1992, coll. Xue Dayong; 1Ƥ, Hekou, 100 m, 5.VI.1956, coll. Huang Keren et al.; 4Ƌ, Hekou, Xiaonanxi, 200 m, 10.VI.1956, coll. Huang Keren et al.; 1Ƌ, Xishuangbanna, Bubang, 700 m, 14.IX.1993, coll. Xu Huanli; 1Ƥ, Xishuangbanna, Yunjinghong, 650 m, 7.VII.1958, coll. Meng Xuwu.

Distribution. China (Guangxi, Yunnan).

Etymology. The species named on the basis of Latin word rectus, which means straight, referring to the medial lines of all wings.

Figures

FIGURES 1 – 17. Adults of Peratophyga (2 X). 1 – 2. P. hyalinata (Yunnan). 1, male; 2, ditto, underside; 3 – 5. P. grata grata. 3, female, syntype (Japan); 4, male (Heilongjiang); 5, ditto, underside; 6 – 8. P. grata totifasciata. 6, male, syntype (Jiangxi); 7, male (Fujian); 8, ditto, underside; 9 – 10. P. crista sp. nov., holotype (Hainan). 9, male; 10, ditto, underside; 11 – 12. P. recta. sp. nov., holotype (Yunnan); 11, male; 12, ditto, underside; 13 – 15. P. bifasciata. 13, male, holotype (Hainan); 14, male (Hainan); 15, ditto, underside; 16 – 17. P. xanthyala. 16, female (Tibet); 17, ditto, underside.

FIGURES 21 – 26. Male genitalia of Peratophyga. 21, P. grata grata (Heilongjiang); 22, P. grata totifasciata (Gansu); 23, P. crista sp. nov. (Hainan); 24, P. re c t a. sp. nov. (Yunnan); 25, P. bifasciata (Hainan); 26, P. xanthyala (Malaysia). Scale bar = 1 mm.

FIGURES 27 – 33. Aedeagus of Peratophyga. 27, P. hyalinata; 28, P. grata grata (Heilongjiang); 29, P. grata totifasciata (Gansu); 30, P. crista sp. nov. (Hainan); 31, P. recta. sp. nov. (Yunnan); 32, P. bifasciata (Hainan); 33, P. xanthyala (Malaysia). Scale bar = 1 mm.

FIGURES 34 – 40. Female genitalia of Peratophyga. 34, P. hyalinata (Yunnan); 35, P. grata grata (Inoue slide no. 4666, Japan); 36, P. grata totifasciata (Jiangxi); 37, P. crista sp. nov. (Hainan); 38, P. re c t a sp. nov. (Yunnan); 39, P. bifasciata (Guangxi); 40, P. xanthyala (Tibet). Scale bar = 1 mm.