Etisus belongs to the Xanthidae family of the Brachyura infraorder and was first described by French zoologist H. Milne-Edwards in 1834.
Xanthidae Family: Brachyura Infraorder: Etisus
H. Milne-Edwards, 1834 Henri Milne-Edwards (23 October 1800  29 July 1885) was an eminent French zoologist. 
