The species was described by Shinji Nagai in 1999 based on specimens that collected from South Vietnam. Not same to other species of the genus, the species is small size and about the size of species of Xylotrupes genus.
The male of the species distinguished with 2 horns on the pronotum, the horn of the head vary with bifid or point apex.
The type locality of the species is Lam Dong Province, South Center of Vietnam.
Male of Eupatorus endoi in difference point of views
A species of Geometridae family, in which most of the members are night flying moths, however this species is a day flying moth with colorful wings. They found from India to Japan and South East Asia. There are four subspecies that have been drescribed: Milionia zonea zonea (North East India, Myanmar to Vietnam), Milionia zonea nishiyamai (found in Leyte Island), Milionia zonea pryeri (found in Japan to Taiwan and Hainan China), Milionia zonea sharpei (found from Malaysia, Borneo and Sumatra area).
Milionia zonea zonea Moore, 1872 (Photographer: Tran Quoc Long - long.tranquoc@live.com - at Da Lat, Lam Dong Province, South Vietnam)
Milionia zonea zonea Moore, 1872 (Video clips by photographer: Tran Quoc Long - long.tranquoc@live.com - at Da Lat, Lam Dong Province, South Vietnam)
