Ammatho (Conicornuta) mangae Volynkin, Huang & Derzhinsky, 2020

Volynkin, Anton V., Huang, Si-Yao & Derzhinsky, Yevgeniy A., 2020, Two new species of the subgenus Conicornuta Volynkin, 2019 of the genus Ammatho Walker, 1855 from China and northern Vietnam (Lepidoptera, Erebidae Arctiinae), Zootaxa 4878 (1), pp. 182-188 : 184

Ammatho (Conicornuta) mangae Volynkin, Huang & Derzhinsky , sp. n.

( Figs 5–7 , 14 , 19, 20 )

Type material. Holotype ( Figs 5 , 14 ): male, “ 10.XI.2018, N Vietnam, Vĩnh Phúc Province, 41 km NNW of Hanoi, Tam Dao Mt. Range, 395m, 21.384260°N, 105.712250°E, Me Linh station for biodiversity, edge of tropical forest on mountain slope, at light. Ye.A. Derzhinsky leg.”, slide ZSM Arct. 2019-680 Volynkin (Coll. MWM / ZSM).

Paratypes: 2 females, the same data as in the holotype, slides ZSM Arct. 2019-681 and AV5889 Volynkin (Colls MWM / ZSM, CAV); 1 female, same locality and collector, but 6.XI.2018 (Coll. CAV) ; 1 female, same locality and collector, but 8.XI.2018 (Coll. CAV) .

Diagnosis. Forewing length is 8.5 mm in male and 10.5– 11 mm in females. Ammatho mangae sp. n. is the smallest known species in the subgenus. Male of A. mangae sp. n. ( Fig. 5 ) resembles externally that of A. convexa ( Figs 8, 10 ), but differs by its slightly narrower forewings. Female of the new species ( Figs 6, 7 ) differs from that of A. convexa ( Figs 9, 11 ) by its less elongated forewing and more diffuse pattern. The male and female genitalia of A. mangae sp. n. are most similar to those of A. sinocontinentalis sp. n., the differences are listed in the ‘Diagnosis’ chapter of the latter. Compared to that of A. convexa ( Fig. 15 ), the male genital capsule of A. mangae sp. n. ( Fig. 14 ) has the uncus less curved subapically, the valva more broadened distally, the thinner medial costal process with more narrowed tip, the larger dorsal spur of the distal costal process, and the longer and nearly straight distal saccular process (in A. convexa that is shorter and slightly curved dorsally). The aedeagus of the new species is slightly shorter than that of A. convexa . In the aedeagus vesica, A. mangae sp. n. ( Fig. 14 ) differs from A. convexa ( Fig. 15 ) by the presence of one medial and two distal cornuti (in A. convexa there are two medial and one distal cornuti, that are weaker), the absence of a basal diverticulum, the absence of a ventral chamber, and the very small and membra-nous distal diverticulum (in A. convexa that is large and granulated). The female genitalia of A. mangae sp. n. ( Figs 19, 20 ) differ clearly from those of A. convexa ( Fig. 21 ) by the broader, nearly rectangular antrum (in A. convexa that is narrower, caliciform, with a deep medial ventral concavity), the broader and shorter ductus bursae, the small and heavily sclerotized left lobe of corpus bursae (in A. convexa that is broad, weakly sclerotized and spinulose scobinated), the narrower and heavily sclerotized basal lobe of appendix bursae (in A. convexa that is broad, more weakly sclerotized and spinulose scobinated), and the smaller anterior section of corpus bursae.

Distribution. The new species is known from the Tam Dao Mountain Range in northern Vietnam (Vĩnh Phúc Province).

Etymology. The species name is dedicated to Mang Thi Tien, the Vietnamese heroine, who lived on the Tam Dao Mountain.

Figures

FIGURES 1–11. Ammatho (Conicornuta) spp., adults. 1, A. sinocontinentalis sp. n., holotype male, China, Guangdong (SCAU); 2, A. sinocontinentalis sp. n., paratype female, China, Guangdong (SCAU); 3, A. sinocontinentalis sp. n., paratype male, China, Fujian (SCAU); 4, A. sinocontinentalis sp. n., paratype male, China, Sichuan (©NHMUK); 5, A. mangae sp. n., holotype male, N Vietnam (MWM/ZSM); 6, A. mangae sp. n., paratype female, N Vietnam (MWM/ZSM); 7, A. mangae sp. n., paratype female, N Vietnam (CAV); 8, A. convexa, lectotype male, Taiwan (©NHMUK); 9, A. convexa, holotype female of Asura cruciata, Taiwan (EIHU, photo by V.V. Zolotuhin); 10, A. convexa, male, Taiwan (MWM/ZSM); 11, A. convexa, female, Taiwan (MWM/ZSM).

FIGURES 12–15. Ammatho (Conicornuta) spp., male genitalia. 12, A. sinocontinentalis sp. n., holotype, China, Guangdong, prep. Huang (SCAU); 13, A. sinocontinentalis sp. n., paratype, China, Guangdong, prep. Huang (SCAU); 14, A. mangae sp. n., holotype, N Vietnam, slide ZSM Arct. 2019-680 Volynkin (MWM/ZSM); 15, A. convexa, lectotype, Taiwan, slide BMNH(E) Arct.-5271 (©NHMUK).

FIGURES 16–21. Ammatho (Conicornuta) spp., female genitalia. 16, A. sinocontinentalis sp. n., paratype, China, Guangdong, prep. Huang (SCAU); 17, A. sinocontinentalis sp. n., paratype, China, Guangdong, prep. Huang (SCAU); 18, A. sinocontinentalis sp. n., paratype, China, Zhejiang, slide AV1828 Volynkin (ZFMK); 19, A. mangae sp. n., paratype, N Vietnam, slide ZSM Arct. 2019-681 Volynkin (MWM/ZSM); 20, A. mangae sp. n., paratype, N Vietnam, slide AV5889 Volynkin (CAV); 21, A. convexa, Taiwan, slide MWM 33590 Volynkin (MWM/ZSM).