Atelecyclus rotundatus

Atelecyclus rotundatus is a medium-sized crab found on the west coast of Europe and Africa as well as almost all the Mediterranean Sea and on the Cape Verde and Canary islands.^[2] It has many common names, including circular crab, round crab and old man's face crab. It measures about 40 millimetres (1.6 in) across its almost circular, reddish-brown carapace and lives on coarse soft bottoms at shallow depths.^[2] There are 9–11 sharp teeth on the front and 3 teeth between the eyes.^[2]

Atelecyclus rotundatus
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Malacostraca
Order:	Decapoda
Suborder:	Pleocyemata
Infraorder:	Brachyura
Family:	Atelecyclidae
Genus:	Atelecyclus
Species:	A. rotundatus
Binomial name
Atelecyclus rotundatus (Olivi, 1792)
Synonyms [1]
Cancer rotundatus Olivi, 1792 Cancer septemdentatus Montagu, 1813 Atelecyclus heterodon Leach, 1815

This crab is sometimes mistaken for the more common Atelecyclus undecimdentatus. However, Atelecyclus undecimdentatus can be distinguished by its wider carapace and coarser granulations.^[3]