Gecarcoidea is a genus of terrestrial crabs. The crabs live in forests but must come to the coast to breed. When it is dry in the summer the crabs are inactive, but when it is the wet season they are ready to migrate.
Mictyris is a genus of brightly coloured crabs, placed in its own taxonomical family, the Mictyridae. It inhabits the central Indo-West Pacific region. These crabs congregate on mud flats or beaches in groups of a few thousand, and filter sand or mud for microscopic organisms. They congregate during low tide, and bury themselves in the sand during high tide or whenever they are threatened. This is done in wet sand, and they dig in a corkscrew pattern, leaving many small round pellets of sand behind them.
Cronius is a genus of crabs containing the two species Cronius ruber and Cronius tumidulus.
Discoplax is a genus of terrestrial crabs. It is very closely related to the genera Cardisoma and Tuerkayana.
Liocarcinus is a genus of crabs, which includes the flying crab, the vernal crab and several other swimming crabs.
Cardisoma is a genus of large land crabs. Three species formerly placed in this genus are now placed in Discoplax. The four species that remain in Cardisoma are found in warm coastal regions where they live in burrows. Young individuals are often very colourful with a purple-blue carapace and orange-red legs, but as they grow older the colours tend to fade, and females may be duller than males. Although less extreme than in fiddler crabs, one claw is usually considerably larger than the other. They are omnivores, but primarily feed on plant material.
Gecarcinus is the type genus of the land crab family Gecarcinidae. They are found in warmer coastal regions of the Americas, including islands in the Caribbean. Four species from oceanic islands were formerly included in Gecarcinus as the subgenus Johngarthia, but are now treated as a separate genus, Johngarthia. While all members of this genus are largely terrestrial, they have to return to the ocean to breed. They are often colourful, with reddish, orange, purple, yellowish, whitish, or blackish being the dominating hues. This has resulted in some species, notably G. quadratus and G. lateralis, gaining a level of popularity in the pet trade.
Eriphia is a genus of marine crustaceans in the family Eriphiidae.
Glebocarcinus is a genus of crabs formerly included in the genus Cancer.
Achlidon agrestis is a species of crab in the family Pseudothelphusidae, and the only species in the genus Achlidon. It lives in rivers in Mexico and Costa Rica.
Karstarma is a genus of karst-dwelling crabs formerly included in Sesarmoides.
Medaeops is a genus of crabs in the family Xanthidae, containing the following species:
Gaillardiellus is a genus of crabs in the family Xanthidae, containing the following species:
Rata is a genus of crabs in the family Xanthidae, containing the following species:
Danielea moelensis is a species of crab in the family Xanthidae, and the only species in the genus Danielea.
Epistocavea mururoa is a species of crabs in the family Xanthidae, the only species in the genus Epistocavea.
Pseudomedaeus is a genus of crabs in the family Xanthidae, containing the following species:
Euryxanthops is a genus of crabs in the family Xanthidae. It was originally established in 1983 by Garth & Kim to contain three species of deep-water crabs from Japan and the Philippines - Euryxanthops dorsiconvexus, Euryxanthops flexidentatus and Euryxanthops orientalis. Since then, several more species of this genus have been identified and described, and Euryxanthops currently contains:
Liagore is a genus of crabs in the family Xanthidae, native to Australia, containing the following species:
Conleyus defodio is a species of crab, the only species in the genus Conleyus and the family Conleyidae. It lives in rubble beds in Guam, and is named after the collector Harry T. Conley.
