Alcis decussata ( Moore, 1868 )

Yu, Xia, Jiang, Xinrui, Wang, Han, Pan, Zhaohui & Han, Hongxiang, 2025, The genus Alcis Curtis, 1826 from Xizang, China, including a new species (Lepidoptera: Geometridae: Ennominae), Zootaxa 5711 (3), pp. 444-450 : 447

Alcis decussata ( Moore, 1868)

( Figs 7 , 16, 24)

Cleora decussata Moore, 1868: 628 , pl. 33, fig. 4. Syntypes ♂, ♀, [ India]: Darjeeling .

Alcis decussata : Fletcher, 1967: 115.

Material examined. Xizang ( XAAHU): 2♂, Nyingchi, Mêdog 80k, 2118 m, 25.vii.2015, leg. Pan Zhaohui.

Diagnosis. On the wing pattern, A. decussata resembles Alcis hodeberti Herbulot, 1987 ( holotype picture examined by Hongxiang Han) for the white middle area on the forewing. But the medial line is continuous in A. hodeberti and discontinuous in decussata . In the male genitalia, A. decussata is distinctive by the combination of the following characters: the cucullus is very narrow, extending beyond valva; the ampulla is located much basally, slender and bent upwards; the juxta is divided totally, with distal half very slender and pointed.

Distribution. China ( Yunnan, Xizang), Japan, India, Nepal, Thailand.

Figures

FIGURES 1–12. 1–4, A. linzhiensis sp. nov.: 1. holotype, male, upperside; 2, ibidem, underside; 3, paratype, male; 4, paratype, female. 5–6, A. arisema: 5, male, upperside; 6, ibidem, underside; 7, A. decussata, male; 8, A. limbui, male; 9, A. sinadmissa, male; 10, A. extinctaria, male; 11–12, A. maculata: 11, male; 12, female. Scale bar = 1 cm.