Xanthoidea is a superfamily of crabs, comprising the three families Xanthidae, Panopeidae and Pseudorhombilidae. Formerly, a number of other families were included in Xanthoidea, but many of these have since been removed to other superfamilies. These include Carpilioidea, Eriphioidea, Hexapodoidea, Pilumnoidea and Trapezioidea. Even in this reduced state, Xanthoidea remains one of the most species-rich superfamilies of crabs.

Xanthoidea. Retrieved May, 22 2023, from en.wikipedia.org/wiki/Xanthoidea.

The Panopeidae are a family containing 26 genera of morphologically similar crabs, often known as "mud crabs". Their centers of diversity are the Atlantic Ocean and eastern Pacific Ocean.

Panopeidae. Retrieved May, 22 2023, from en.wikipedia.org/wiki/Panopeidae.

Lophopanopeus bellus, the black-clawed crab, is a species of crab in the family Panopeidae. It is native to the Pacific coasts of North America, its range extending from Alaska to California.

Lophopanopeus bellus. Retrieved May, 22 2023, from en.wikipedia.org/wiki/Lophopanopeus_bellus.