Acanthaecites

Acanthaecites is an extinct cephalopod genus belonging to the ammonoid family Oppeliidae first described by Rollier in 1909.^[2] Acanthaecites both appears and disappears from the fossil record during the Callovian stage of the Jurassic Period.

Acanthaecites Temporal range: Callovian[1] PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Order:	†Ammonitida
Family:	†Oppeliidae
Genus:	†Acanthaecites Rollier 1909

The shell of Acanthaecites is small, globose and smooth except for a median ventral row of distinct sharp serrations.