Ammathella longicornuta S.-Y. Huang, Yin & Volynkin, 2022

Yin, Xiong-Yan, Volynkin, Anton V., Zhang, Yu-Long, Chen, En-Yong, Huang, Si-Yao & Pan, Zhao-Hui, 2022, Taxonomic review of the genus Ammathella Volynkin, 2019 with descriptions of three new species from southeastern Xizang, China (Lepidoptera, Erebidae, Arctiinae, Lithosiini), ZooKeys 1114, pp. 167-182 : 167

Ammathella longicornuta S.-Y. Huang, Yin & Volynkin sp. nov.

Figs 1-4 , 19 , 20 , 31

Type material.

Holotype: male, altitude 800 m, 9.VI.2017, Beibeng Village, Motuo County, Linzhi City, Xizang Autonomous Region, China, Zhao-hui Pan leg., slide STS-40157 (TAAHU). Paratypes: 5 males, 3 females, same data as the holotype, slides STS-40148, STS-40154, STS-40155 & STS-40163 (male); STS-40156, STS-40162 & STS-40164 (female) (TAAHU).

Diagnosis.

Length of forewing 11.4-11.9 mm (n = 5, 11.5 mm in holotype) in males and 12.6-13.1 mm (n = 3) in females. Ammathella longicornuta sp. nov. is externally reminiscent of A. gesar (Figs 11 , 12 , 25 , 26 ) and A. garo (Figs 13 , 14 , 27 , 33 ) but is distinguished by the male tip of abdomen, which is pinkish and covered with much lesser blackish hair-like scales than in the similar congeners, and the obsolete submarginal dull yellowish spots on the forewing (whereas they are prominent in A. gesar and A. garo ). In the male genitalia, A. longicornuta sp. nov. is distinguished from the two similar congeners by the combination of the following characters. (1) The juxta lacks a medial process, similar to A. gesar , while the juxta of A. garo bears a long conical process. (2) The medial costal process is minute while it is large and prominent in A. gesar and A. garo . (3) The distal costal process is situated more distally than in A. gesar and A. garo , and is much broader and shorter, whereas it is lobe-like and markedly narrower in the congeners. (4) The distal saccular process is directed distally whereas it is up curved in A. gesar and A. garo . (5) In the phallus vesica, the subbasal diverticulum bears a small cluster of cornuti apically (absent in A. gesar and A. garo ). (6) The semiglobular medial diverticulum bears a broad cluster consisting of several large and long cornuti basally and numerous smaller cornuti ventro-distally, while in A. gesar and A. garo , the cornuti in the semiglobular medial diverticulum are more or less equal in size. (7) The ventro-basal elongate diverticulum of A. longicornuta sp. nov. is longer than in A. garo , while it is absent in A. gesar . Since the female of A. gesar is unknown, the female genitalia of A. longicornuta sp. nov. are compared only to A. garo , from which the new species differs in the shorter and broader ductus bursae, and the lack of a signum bursae, which is present in A. garo .

Etymology.

The specific epithet Ammathella longicornuta refers to the presence of long and large cornuti on the surface of the semiglobular medial diverticulum in vesica of male genitalia.

Distribution.

Currently known only from the type locality in Motuo County, southeastern Xizang, China.

Figures

Figure 1 - 10. Adults of Ammathella 1 holotype of A. longicornuta sp. nov., male, STS- 40157, SW China (TAAHU) 2 paratype of A. longicornuta sp. nov., male, STS- 40163, SW China (TAAHU) 3 paratype of A. longicornuta sp. nov., female, STS- 40156, SW China (TAAHU) 4 paratype of A. longicornuta sp. nov., female, STS- 40164, SW China (TAAHU) 5 holotype of A. lhoba sp. nov., male, STS- 40180, SW China (TAAHU) 6 paratype of A. lhoba sp. nov., male, STS- 38863, SW China (TAAHU) 7 paratype of A. lhoba sp. nov., female, STS- 38864, SW China (TAAHU) 8 holotype of A. monpa sp. nov., male, STS- 40151, SW China (TAAHU) 9 paratype of A. monpa sp. nov., male, STS- 40159, SW China (TAAHU) 10 paratype of A. monpa sp. nov., male, STS- 40169, SW China (TAAHU).

Figure 19 - 22. Male genitalia of Ammathella 19 holotype of A. longicornuta sp. nov., slide STS- 40157, SW China (TAAHU) 20 paratype of A. longicornuta sp. nov., slide STS- 40163, SW China (TAAHU) 21 holotype of A. lhoba sp. nov., slide STS- 40180, SW China (TAAHU) 22 paratype of A. lhoba sp. nov., slide STS- 38863, SW China (TAAHU).

Figure. 31 - 35. Female genitalia of Ammathella 31 paratype of A. longicornuta sp. nov., slide STS- 40156, SW China (TAAHU) 32 paratype of A. lhoba sp. nov., slide STS- 38864, SW China (TAAHU) 33 paratype of A. garo, slide MWM 31770, NE India (MWM / ZSM) 34 paratype of A. midzhan, slide MWM 31768, N Myanmar (MWM / ZSM) 35 paratype of A. shingwa, ZSM Arct. 2019 - 822 Volynkin, N Myanmar (MWM / ZSM).

Figure 11 - 18. Adults of Ammathella 11 holotype of A. gesar, male, SW China (SCAU) 12 paratype of A. gesar, male, SW China (SCAU) 13 holotype of A. garo, male, MWM 31769, NE India (MWM / ZSM) 14 paratype of A. garo, female, MWM 31770, NE India (MWM / ZSM) 15 holotype of A. midzhan, male, MWM 31683, N Myanmar (MWM / ZSM) 16 paratype of A. midzhan, female, MWM 31768, N Myanmar (MWM / ZSM) 17 holotype of A. shingwa, male, ZSM Arct. 2019 - 806 Volynkin, N Myanmar (MWM / ZSM) 18 paratype of A. shingwa, male, ZSM Arct. 2019 - 822 Volynkin, N Myanmar (MWM / ZSM).

Figure 23 - 26. Male genitalia of Ammathella 23 holotype of A. monpa sp. nov., slide STS- 40151, SW China (TAAHU) 24 paratype of A. monpa sp. nov., slide STS- 40159, SW China (TAAHU) 25 holotype of A. gesar, SW China (SCAU) 26 paratype of A. gesar, SW China (SCAU).

Figure 27 - 30. Male genitalia of Ammathella 27 holotype of A. garo, slide MWM 31769, NE India (MWM / ZSM) 28 holotype of A. midzhan, slide MWM 31683, N Myanmar (MWM / ZSM) 29 paratype of A. midzhan, slide MWM 31767, N Myanmar (MWM / ZSM) 30 holotype of A. shingwa, ZSM Arct. 2019 - 806 Volynkin, N Myanmar (MWM / ZSM).