Ammatho (Ammathella) shingwa Volynkin & Huang, 2020

Huang, Si-Yao, Volynkin, Anton V., Wang, Min & Fan, Xiao-Ling, 2020, Three new species of the genus Ammatho Walker, 1855 from China and Indochina (Lepidoptera: Erebidae: Arctiinae: Lithosiini), Zootaxa 4809 (3), pp. 582-592 : 587-590

Ammatho (Ammathella) shingwa Volynkin & Huang sp. nov.

( Figs 9–10 , 20 , 25 )

Type material. Holotype: male, Myanmar (Burma), 50 km E Putao, env. Nan Thi village , 950 m, 11–16.V.1998, leg. Murzin & Sinjaev, slide ZSM Arct. 2019–806 Volynkin ( MWM / ZSM).

Paratypes: 1 male, 1 female with the same data as in the holotype, slide ZSM Arct. 2019–821 (male) Volynkin ( MWM / ZSM) ; 1 female, Myanmar (Burma), 50 km NE Putao, Wa Sa Dam village , 950 m, 17. V .1998, leg. Murzin & Sinjaev, slide ZSM Arct. 2019–822 Volynkin ( MWM / ZSM) .

Diagnosis. Externally A. shingwa sp. nov. is similar to A. gesar sp. nov., and the differences between these two species are discussed above in the diagnosis of A. gesar . The male genitalia of A. shingwa sp. nov. are mostly similar to those of A. midzhan Volynkin, 2018 ( Figs 13–14 , 22 , 27 ) due to the absence of the semi-globular medial diverticulum, but A. shingwa sp. nov. can be easily distinguished from the latter by its smaller medial costal process and distal costal process, smaller and less protruding membranous lobe of valva, broader distal end of distal saccular process, shorter aedeagus, narrower vesica with well-developed small cornuti field, smaller subbasal diverticulum with finer scobination and the single cluster of large cornuti, whereas in A. midzhan both the medial costal process and the distal costal process are larger, the membranous lobe of valva is larger and more protruding, the distal saccular process is narrower apically, the aedeagus is longer, the aedeagus vesica is broader, the subbasal diverticulum is larger and bears a small cluster of fine cornuti, and the medial and distal diverticula bears clusters of short but robust cornuti. The female genitalia of A. shingwa sp. nov. can be distinguished from those of A. midzhan by its slightly longer antrum, the smaller spinules and a much smaller signum in corpus bursae.

Description. Male. Length of forewing is 11.5 mm. Antenna long, ciliated, ochreous thoroughly. Head and thorax covered by ochreous scales dorsally, abdomen pale yellow thoroughly. Forewing broad. Ground color is pale yellow with an ochreous tint. Costa is black from base to apex. Wing pattern comprises of red and black markings. Reddish marking narrow and is mostly confined to veins. Subbasal spot small and rounded. Antemedial line is broad and convex in discoidal cell. Medial line is broad and wavy, touching antemedial line in discoidal cell and together forming an X-shaped pattern. Postmedial line narrow and broadly shifts outwards around the end of discoidal cell. Blackish lengthwise strokes very short, present in postmedial zone and vary in length. Cilia black. Hindwing ground color yellowish white with pinkish tint. An obscure blackish patch presents beyond the apex. Cilia yellowish white scattered with black.

Male genitalia. Uncus long and slender, gradually narrowing towards tip. Tegumen elongated and triangular. Juxta broad, plate-like. Saccus broad, U-shaped. Valva narrow and long, costa strongly sclerotized, medial costal process large and trapezoid; distal costal process short and rounded; membranous lobe of valva large and protruding outwards; sacculus strongly sclerotized, with its inner edge densely setose basally; distal saccular process long and gradually narrowing towards tip, ending in a blunt apex; aedeagus short and robust; vesica narrow, subbasal diverticulum membranous, broad and covered by granulation, with a lobe pointed basally; the central part of the medial diverticulum covered thoroughly by strong granulation; a cluster of short and robust cornuti presents at the ventral end of the medial diverticlum.

Female. Length of forewing is 12.5–13.5 mm. Size slightly larger than male with forewing broader, and the wing pattern is similar to that of male.

Female genitalia. Papilla analis rectangular; apophysis posterioris and anterioris moderately long and nearly the same length; antrum broad and strongly sclerotized; ductus bursae short, sclerotized in the posterior half; corpus bursae large and oval, medially covered by numerous spinules; signum presents, minute and rounded; appendix bursae nearly triangular, short and strongly sclerotized.

Distribution. Currently only known from Kachin State, Northeastern Myanmar.

Etymology. Shingwa is one of 37 nats in the Myanmar folk religion.

Figures

FIGURES 7–14. Ammatho (Ammathella) spp. adults. 7, A. gesar sp. nov., holotype male, SW China, Xizang (SCAU); 8, A. gesar sp. nov., paratype male, SW China, Xizang (SCAU); 9, A. shingwa sp. nov., holotype male, NE Myanmar, Kachin (MWM/ZSM); 10, A. shingwa sp. nov., paratype female, NE Myanmar, Kachin (MWM/ZSM); 11, A. garo, holotype male, NE India, Assam (MWM/ZSM); 12, A. garo, paratype male, NE India, Assam (MWM/ZSM); 13, A. midzhan, holotype male, NE Myanmar, Kachin (MWM/ZSM); 14, A. midzhan, paratype female, NE Myanmar, Kachin (MWM/ZSM). Scale=1 cm.

FIGURES 19–22. Male genitalia of Ammatho (Ammathella) spp. 19, A. gesar sp. nov., holotype, preparation Huang; 20, A. shingwa sp. nov., holotype, slide ZSM Arct. 2019-806; 21, A. garo, holotype, slide MWM31769; 22, A. midzhan, holotype, slide MWM31683.

FIGURES 23–27. Female genitalia of Ammatho spp. 23, A. (S.) inexpecta sp. nov., paratype, slide MWM33611; 24, A. (S.) mesortha, slide ZSM Arct.2020-112; 25, A. (A.) shingwa sp. nov., paratype, slide ZSM Arct. 2019-822; 26, A. (A.) garo, paratype, slide MWM31770; 27, A. (A.) midzhan, paratype, slide MWM31768.