Cyclidia fractifasciata indistincta Jiang, Han & Xue

Jiang, Nan, Liu, Shuxian, Xue, Dayong & Han, Hongxiang, 2016, A review of Cyclidiinae from China (Lepidoptera, Drepanidae), ZooKeys 553, pp. 119-148 : 130

Taxon classification Animalia Lepidoptera Drepanidae

Cyclidia fractifasciata indistincta Jiang, Han & Xue subsp. n. Figs 16, 17, 33, 44, 54

Description.

Head. Antennae blackish brown dorsally, flat and unipectinate, basal half without rami, rami very short. Frons blackish grey, not protruding. Labial palpi black with third segment distinct, extending beyond frons. Vertex black scattered with grey scales.

Thorax. Patagia white at basal half and blackish grey at terminal half. Tegula blackish grey. Dorsal side of thorax white with two pairs of blackish grey patches medially. Hind tibia with two pairs of spurs in both sexes. Forewing length: 37-40 mm. Apex of forewing rounded, not falcate; outer margin of both wings smooth. Wings white, transverse lines black. Forewing with a blackish brown patch basally; subbasal line broad; antemedial lines double, outer line indistinct and often invisible; medial line broad band-like at anterior half, very narrow and dot-like at posterior half; outer margin of medial line forming an almost right angle below M3; discal spot white, almost rhombic; postmedial lines double, wavy, inner line very obscure; submarginal line double, broad, and invisible between M3 and CuA1; terminal lines double and discontinuous on each vein, inner line composed of oval markings, outer line appearing as series of short strips, inner markings often fused with outer ones; fringes white mixed with blackish grey. Hind wing with indistinct submarginal line; terminal lines and fringes similar to those of forewing. Underside white, striations indistinct than those of upperside.

Abdomen. Abdominal segments diffused with white scales. Pairs of black quadrate markings on first to seventh abdominal segments. Anterotergal syndeses developed at anterior margin of 2nd tergum. A pair of androconial hair-pencils present on 2nd pleuron of male.

Male genitalia. Uncus triangular. Socii sclerotized, about four-fifths the length of uncus. Gnathos with median process small and triangular. Valva narrow terminally; costa sclerotized and almost straight. Juxta formed a pair of forcipiform processes posteriorly. Saccus semicircular, about two-fifths length of basal width. Phallus slightly curved, with a small triangular lateral process posteriorly; vesica without cornuti.

Female genitalia. Lamella postvaginalis rectangle. Ductus bursae with a colliculum, long and narrow, striate longitudinally. Corpus bursae oval, with a paired slender signa; signa separated and parallel.

Diagnosis.

The subspecies is very similar to the nominate subspecies, but differs externally by the following characters: the outer line of the antemedial line and the inner line of the postmedial line on the forewing are invisible, while in the nominate subspecies, they are much more distinct; the forewing discal spot is larger; the inner terminal markings of the forewing are larger and fused with the outer ones partly, while in Cyclidia fractifasciata fractifasciata , they are often smaller and separated from the outer ones.

Type material examined.

Holotype, ♂, CHINA: Gansu (IZCAS): Kangxian, Yangba, Meiyuangou, 1000 m, 13.VIII.2014, coll. Xue Dayong and Ban Xiaoshuang. Paratypes: 3♂2♀, same data as holotype. Chongqing (IZCAS): 1♀, Wushan, Wulipo, Dangyang, Congping, 1773 m, 25.VII.2013, coll. Cheng Rui.

Genetic data.

The intrasubspecific divergence of the barcode region in Cyclidia fractifasciata indistincta is 1%. The intraspecific divergence of the barcode region between Cyclidia fractifasciata fractifasciata (n = 4) and Cyclidia fractifasciata indistincta (n = 5) is 2.3%. The distance between Cyclidia fractifasciata with the nearest neighbour species Cyclidia substigmaria is 12.5%.

Distribution.

China (Gansu, Chongqing).

Etymology.

The subspecies is named on the basis of the Latin adjective indistinctus, referring to the transverse lines of the forewing.