Cronius is a genus of crabs containing the two species Cronius ruber and Cronius tumidulus.
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.
Parthenopidae is a family of crabs, placed in its own superfamily, Parthenopoidea. It comprises nearly 40 genera, divided into two subfamilies, with three genera incertae sedis:
Menippidae is a family of crabs of the order Decapoda.
Ozius is a genus of crabs in the family Menippidae, containing the following species:
Calappidae is a family of crabs containing 16 genera, of which 7 are only known as fossils:
Dairoidea is a superfamily of crabs, comprising two families which each contain a single genus: Dairidae and Dacryopilumnidae (Dacryopilumnus) .
Osachila is a genus of crabs in the family Aethridae, containing three fossil species, and the following extant species:
Paraliomera is a genus of crabs in the family Xanthidae, containing the following species:
Cataleptodius is a genus of crabs in the family Xanthidae, containing the following species:
Melybia thalamita is a species of crab in the family Xanthidae, the only species in the genus Melybia. It is found in the western Atlantic Ocean, from Florida and the Gulf of Mexico south to São Paulo, Brazil, at depths of 10–200 metres (33–656 ft).
Micropanope is a genus of crabs in the family Pseudorhombilidae, containing one exclusively fossil species and the following species:
Paraxanthias is a genus of crabs in the family Xanthidae, containing one exclusively fossil species and the following extant species:
Xanthodius is a genus of crabs in the family Xanthidae, containing one exclusively fossil species and the following species:
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.
Pyromaia cuspidata, also known as the dartnose pear crab, is a species of crab in the family Inachoididae. This crab appears similar to Anasimus latus. It is a long-legged crab with a trident-shaped rostrum, and occurs in Atlantic waters from North Carolina to west Florida, and in the Gulf of Mexico through the Yucatán Peninsula down to Nicaragua. It is also found in Cuban waters. This species lives in depths of 27–549 metres (89–1,801 ft) on bottoms of mud, sand, or pebbles.
Pyromaia is a genus of crab in the family Inachoididae, containing the following species:
Pilumnoides is a genus of crabs in the family Pilumnoididae. The genus was erected by Hippolyte Lucas in 1844. It contains the following species:
Mithraculus cinctimanus is a species of crab in the family Majidae. It is found in the Caribbean region and is usually associated with a sea anemone, sponge or coral.
Bathynectes is a genus of crabs in the family Polybiidae.
