Claim: Actumnus, which contains 28 extant species, belongs to a family of Pilumnidae and the order Decapoda.
Evidence: Actumnus is a genus of crabs in the family Pilumnidae. Alongside the 28 extant species, it has a fossil record extending back into the Miocene. Family: Pilumnidae Order: Decapoda Actumnus contains 28 extant species: