Genus Collitoptyx Volynkin, 2023

Collitoptyx Volynkin, 2023, Ecologica Montenegrina, 69: 61.

Type species: Thysanoptyx incurvata Wileman & West, 1928, by original designation.

Diagnosis. Species of the genus (Figs 1–27) externally differ from Thysanoptyx (Figs 27, 28) in the longer body, the broader forewing with a more convex anal margin and the longer distal section (between the cell and the outer margin), and the longer medial spot. The male genitalia of the genus (Figs 34–44) differ from Thysanoptyx (Fig. 48) in the following characters. (1) The uncus is unilobate and more or less rod-like whereas in Thysanoptyx it is bilobate with lobes medially connected by a membrane, and dorso-ventrally flattened. (2) The juxta is swollen and its ventral section consists of two ribbon-like lateral lobes connected by a medial membrane while the dorsal section is volumetric, conical or pyramidal and sclerotised. Unlike in Collitoptyx, the juxta of Thysanoptyx is more flattened, trapezoidal and consists of two thin ribbon-like lateral lobes connected by a medial membrane, which are dorsally connected by a narrow sclerotised ‘bridge’. (3) The valva is markedly narrower and longer than in Thysanoptyx. (4) The distal half of the dorsal margin of the valva is flattened, weakly sclerotised (secondary sclerotisation) and weakly setose whereas in Thysanoptyx it is swollen, well-sclerotised and more densely setose or spinulose. (5) In the conjuga the costal part (processus momenti) is more heavily sclerotised and performs a skeletal function whereas in Thysanoptyx only a short tendon is present. (6) The phallus is considerably smaller in proportion to the genital capsule than in Thysanoptyx. (7) The vesica consists of more or less globular main diverticulum bearing a single spike-like cornutus distally, and the vesica ejaculatorius originates basally. In Thysanoptyx the main diverticulum is elongate, has large subdiverticula laterally, and bears plate-like cornuti and clusters of robust spines, whereas the sub-ejaculatorial (apical) part of the vesica is well-developed, broad, and the vesica ejaculatorius originates from its distal section.

The female genitalia of Collitoptyx (Figs 52–60) are distinguished from Thysanoptyx (Fig. 62) by the very short, narrow and posteriorly membranous ductus bursae, which is heavily sclerotised and dorso-ventrally flattened in Thysanoptyx.

The detailed comparison with Medioptyx gen. n. is provided below in the diagnosis of the latter genus.

Distribution. Species of the genus are distributed from Himalaya in the west through Southwest China and northern Mainland Southeast Asia to the island of Taiwan in the east.