Telmessidae Guinot, 1977 Cheiragonidae is a small family of crabs, sometimes called helmet crabs,[1] placed in its own superfamily, Cheriagonoidea.

[2][3] It comprises three extant species, Erimacrus isenbeckii, Telmessus acutidens and Telmessus cheiragonus,[2] there are no yet evidences of Cheiragonidae in the fossil record.

[3][4] Many of these crabs were formerly treated as members of the Atelecyclidae.

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