Cyana adelina (Staudinger, 1887)

Volynkin, Anton V., Černý, Karel, Huang, Si-Yao & Saldaitis, Aidas, 2023, Taxonomic review of the Cyana adelina (Staudinger) species-group (Lepidoptera: Erebidae: Arctiinae) with descriptions of three new species and one new subspecies from Laos, Thailand and China, Zootaxa 5323 (4), pp. 477-498 : 478

The Cyana adelina species-group

Diagnosis. The species-group comprises different looking species the male genitalia of which are characterised by the anellus bearing two sclerotised and serrulate plates and the valva lacking ampulla. In the female genitalia, the posterior section of the corpus bursae is gelatinous and having sclerotised plates while the anterior section is membranous and bearing one or two signa.

Morphological characteristic of adults. Sexual dimorphism substantial. Male. Antenna ciliate. Body white, tegula, patagia and metathorax edged with either red or various shades of yellow or brown. Forewing with rounded apex, with androconial lobe on underside and additional broad row of androconial scales along costal margin medially. Transverse lines red, yellowish or brownish. Subbasal line not reaching anal margin.Ante- and postmedial lines various in shape. Subterminal line smoothly curved along outer margin, in certain species broad and diffuse or absent. Cell with two black or brown spots, outer one can be interrupted into two unequal spots. In certain species, an additional black spot present at costal margin at the distal end of androconial cluster. Hindwing distally suffused with greyish, pinkish or yellowish scales. Discal spot large, semilunar and diffuse, or absent. Male genitalia. Uncus short (ca. half of tegumen length or shorter), triangular, dorso-ventrally flattened, weakly sclerotised, basally fused with tuba analis. Tuba analis broad. Subscaphium setose. Arms of tegumen weakly sclerotised and fused in posterior third. Vinculum as long as tegumen or somewhat shorter, heavily sclerotised, U-shaped. Valva lobular, medially dilated and apically rounded. Clasper with very short crest stretching along its axis. Sacculus moderately broad (ca. half of valva width), with robust, flattened, somewhat upcurved, distally tapered and apically pointed distal process. Juxta trapezoidal, weakly sclerotised with membranous anterior end. Anellus with two sclerotised plates with serrulate outer surface. Phallus cylindrical, medially dilated, with short and rounded coecum. Vesica broad (in proportion to phallus width), with several diverticula of various shapes, in certain species bearing from one to three clusters of robust spines. Female. Larger than male with more elongate forewing. Antenna sparsely ciliate. Colouration and markings as in male but cell with three spots of which an additional one situated mediallyposteriorly at vein Cu. Female genitalia. Papilla analis broadly trapezoidal with rounded corners, weakly setose. Apophyses strongly elongate and thin, apophysis anterioris as long as apophysis posterioris or slightly shorter than it. Ostium bursae as broad as tip of ovipositor. Ductus bursae cylindrical or somewhat tapered anteriorly, gelatinous, in certain species with longitudinal sclerotised plates or wrinkles. Posterior section of corpus bursae gelatinous with sclerotised plates. Anterior section of corpus bursae broader than posterior one, elliptical or teardrop-shaped, membranous with one or two signa. Appendix bursae originating from posterior section of corpus bursae laterally, short, conical or helicoid, with membranous bulla of various sizes.