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The Decapoda or decapods are an order of crustaceans within the class Malacostraca, including many familiar groups, such as crayfish, crabs, lobsters, prawns, and shrimp. Most decapods are scavengers. The order is estimated to contain nearly 15,000 species in around 2,700 genera, with around 3,300 fossil species. Nearly half of these species are crabs, with the shrimp and Anomura including hermit crabs, porcelain crabs, squat lobsters making up the bulk of the remainder. The earliest fossil decapod is the Devonian Palaeopalaemon.
Henri Milne-Edwards was an eminent French zoologist.
King crabs are a taxon of crab-like decapod crustaceans chiefly found in cold seas. Because of their large size and the taste of their meat, many species are widely caught and sold as food, the most common being the red king crab.
Callianassidae is a family of ghost shrimp of the order Decapoda.
The Paguridae are a family of hermit crabs of the order Decapoda. This family contains 542 species in over 70 genera:
Pagurus is a genus of hermit crabs in the family Paguridae. Like other hermit crabs, their abdomen is not calcified and they use snail shells as protection. These marine decapod crustaceans are omnivorous, but mostly prey on small animals and scavenge carrion. Trigonocheirus and Pagurixus used to be considered subgenera of Pagurus, but the former is nowadays included in Orthopagurus, while the latter has been separated as a distinct genus.
Calcinus is a genus of hermit crabs in the family Diogenidae, containing the following species:
The Parapaguridae are a family of marine hermit crabs from deep waters. Instead of carrying empty gastropod shells like other hermit crabs, they carry colonies of dozen or more sea anemones or zoanthids. Some genera, such as Bivalvopagurus and Tylaspis, do not inhabit shells. The following genera are included:
Paguristes is a genus of hermit crab in the family Diogenidae. It includes the following species :
Munidopsis is a genus of squat lobster. It is the second largest of all the genera of squat lobsters, after Munida, with over 200 species. Its members are mainly found on continental slopes and on abyssal plains. A few fossil species are also known, including specimens from the Campanian (Cretaceous).
Munida is the largest genus of squat lobsters in the family Munididae, with over 240 species.
Uroptychus is a genus of squat lobsters in the family Chirostylidae found across the Indo-Pacific. The genus Uroptychus contains the following species:
The Galatheoidea are a superfamily of decapod crustaceans comprising the porcelain crabs and some squat lobsters. Squat lobsters within the three families of the superfamily Chirostyloidea are not closely related to the squat lobsters within the Galatheoidea. The fossil record of the superfamily extends back to the Middle Jurassic genus Palaeomunidopsis.
Cancellus is a genus of hermit crabs in the family Diogenidae. Members of this genus are most commonly found living in small crevices in the outer contintental shelf at mesophotic depths. They can be found living in rocks, sponges, and algae among other places. The genus has a cosmopolitan distribution. Four species are known from the western Atlantic.
Dendrophylliidae is a family of stony corals. Most members are azooxanthellate and thus have to capture food with their tentacles instead of relying on photosynthesis to produce their food. The World Register of Marine Species includes these genera in the family:
Oncopagurus, is a genus of marine hermit crabs in the family Parapaguridae, which contains 25 species. They live from 40 to 2,308 meters below the surface.
Solenocera is a genus of prawns in the family Solenoceridae. Solenocera occur from 0 to 2,067 meters deep in the ocean.
Pseudopaguristes is a genus of hermit crabs in the family Diogenidae.
Heterocyathus is a genus of coral of the family Caryophylliidae.
References
- 1 2 "WoRMS - World Register of Marine Species - Paragiopagurus Lemaitre, 1996". www.marinespecies.org. Retrieved 2019-03-17.
- ↑ "Paragiopagurus Lemaitre 1996 - Encyclopedia of Life". eol.org. Retrieved 2019-03-17.