Ammatho (Delineatia), Volynkin & Huang, 2019

Volynkin, Anton V. & Wu, Shipher, 2020, A review of the subgenus Delineatia Volynkin & Huang, 2019 of the genus Ammatho Walker, 1855, with descriptions of two new species from Taiwan and Vietnam (Lepidoptera, Erebidae, Arctiinae, Lithosiini), Zootaxa 4801 (2), pp. 237-250 : 238

Subgenus Delineatia Volynkin & Huang, 2019

Ammatho (Delineatia) Volynkin & Huang in Volynkin, Huang & Ivanova, 2019 , Ecologica Montenegrina 26: 21, figs 15, 16, 111, 167 (Type species: Hypoprepia delineata Walker, 1854 , by the original designation).

Diagnosis. Medium-sized moths with red colouration and blackish pattern. Externally, members of the subgenus are similar to species of the subgenus Conicornuta Volynkin, 2019 of the genus Ammatho . Male genitalia of the subgenus are characterised by the combination of the following features: (1) the densely serrulate anellus; (2) the small medial costal process at very long and narrow, lobe-like base (an autapomorphic feature); (3) the very large and heavily sclerotised distal costal process bearing several denticles or short prominences; (4) the very small distal membranous lobe of valva; (5) the strongly setose sacculus; (6) the narrow vesica with short diverticula bearing clusters of very small spine-like cornuti or granulation. Female genitalia structure is typical for the genus Ammatho and is characterised by (1) the presence of a well-developed postvaginal plate; (2) the cup-like or funnel-like antrum and the very short anterior membranous section of corpus bursae; (3) the weakly scobinated posterior section of corpus bursae; (4) the membranous anterior section of corpus bursae lacking signa.

Distribution. The subgenus is distributed in Indochina, mainland China and the island of Taiwan.