Xanthoidea

Xanthidae is a family of crabs known as gorilla crabs, mud crabs, pebble crabs or rubble crabs. Xanthid crabs are often brightly coloured and are highly poisonous, containing toxins which are not destroyed by cooking and for which no antidote is known. The toxins are similar to the tetrodotoxin and saxitoxin produced by puffer fish, and may be produced by bacteria in the genus Vibrio living in symbiosis with the crabs, mostly V. alginolyticus and V. parahaemolyticus.

Rhithropanopeus harrisii (common names include the Zuiderzee crab, dwarf crab, estuarine mud crab, Harris mud crab, white-fingered mud crab, and white-tipped mud crab) is a small omnivorous crab native to Atlantic coasts of the Americas, from New Brunswick to Veracruz.

Xanthoidea is a superfamily of crabs, comprising seven families. 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.

thumb|Lophopanopeus bellus, Black-clawed crab, San Luis Obispo County, California

Pseudorhombilidae is a family of crabs.

species of crustacean

Dyspanopeus is a genus of crabs in the family Panopeidae, comprising two species:

species of crustacean

species of crustacean

species of crab

genus of crustaceans

species of crustacean

species of crustacean

species of crab

Eurytium is a genus of crab in the family Panopeidae, containing the following species:

Nanocassiope is a genus of crabs in the family Xanthidae, containing the following species: