Cossa Walker, [1865]

Volynkin, Anton V., Černý, Karel & Huang, Si-Yao, 2025, On the generic assignment of the taxa placed in the Oriental footman-moth genus Teulisna with the description of three new genera, one subgenus and eighteen new species, Ecologica Montenegrina 88, pp. 104-163 : 110

Subgenus Cossa Walker, [1865] , stat. rev.

Cossa Walker, [1865] 1864, List of the specimens of lepidopterous insects in the collection of the British Museum, 31: 232 (Type species: Cossa basigera Walker, [1865] 1864, by monotypy).

Notes. (1) The type species of the subgenus has reduced intravincular sclerotisations with only the processus intrinsicus being present. However, other three species in the subgenus have fully developed intravincular structures. (2) The subgenus comprises four species endemic to the Indian subcontinent, which were reviewed by Volynkin (2023a).

Diagnosis. Species of the subgenus Cossa ( Figs 13, 14 ; also illustrated by Volynkin (2023a)) differ externally from Teulisna s. str. in the shortly pectinate male antenna, and the more elongate, narrow and distally less angular forewing, which is reminiscent of certain genera in the Thysanoptyx generic complex. The male genitalia of the subgenus Cossa ( Fig. 99 ; also illustrated by Volynkin (2023a)) are morphologically close to the nominate one but differ in the structure of the lamella centralis, which is narrow string-like whereas it is bilobate in Teulisna s. str. The female genitalia of the subgenus ( Fig. 153 ; also illustrated by Volynkin (2023a)) display no fundamental differences from other subgenera.

Figures

Figures 1–16. Adults of Lithosiina spp. Depositories of the specimens: 1–4, 11 and 12 in MWM/ZSM; 5–10, 13– 16 in CKC.

Figures 96–99. Male genitalia of Lithosiina spp. Depositories of the specimens dissected: 96 in MfN; 97 in CKC; 98 in MWM/ZSM; 99 in OUMNH.

Figures 153–157. Female genitalia of Teulisna spp. Depositories of the specimens dissected: 153 in OUMNH; 154–156 in MWM/ZSM; 157 in CKC.