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A hermit crab emerges from its shell, Coenobita perlatus Outside its shell, the soft, curved abdomen of hermit crabs, such as Pagurus bernhardus, is vulnerable. Hermit crab species range in size and shape, from species only a few millimeters long to Coenobita brevimanus (Indos Crab), which can approach the size of a coconut and live 12–70 years.
Anomura (sometimes Anomala) is a group of decapod crustaceans, including hermit crabs and others. Although the names of many anomurans include the word crab, all true crabs are in the sister group to the Anomura, the Brachyura (the two groups together form the clade Meiura).
The example of king crabs (family Lithodidae) evolving from hermit crabs has been particularly well studied, and evidence in their biology supports this theory. For example, most hermit crabs are asymmetrical , and fit well into spiral snail shells ; the abdomens of king crabs, even though they do not use snail shells for shelter, are also ...
Coenobita brevimanus is a species of terrestrial hermit crab belonging to the family Coenobitidae, which is composed of coastal living terrestrial hermit crabs.From there it belongs to the genus Coenobita, one of two genera split from the family, which contains sixteen species.
The white-spotted hermit crabs are gonochorics, the eggs are carried on the female's abdomen. They also are opportunistic omnivore, mainly feeding on small invertebrates (worms, molluscs, etc.) and they are also reported to feed on holothurians. Commonly these crabs perform a precopulatory courtship ritual. Usually the sperm transfer is indirect.
Calcinus laurentae is a species of left-handed hermit crab in the family Diogenidae. [1] The common name for Calcinus laurentae is Laurent's Hermit Crab [ 2 ] or Redleg calcinus. [ 3 ] Calcinus laurentae are native to Hawaii [ 4 ] and the Hawaiian word for hermit crab is unauna.
Coenobita is closely related to the coconut crab, Birgus latro, with the two genera making up the family Coenobitidae.The name Coenobita was coined by Pierre André Latreille in 1829, from an Ecclesiastical Latin word, ultimately from the Greek κοινόβιον, meaning "commune"; the genus is masculine in gender.
In New Zealand there are more than 60 known species of hermit crab, [5] predominantly found along the coastline in tidal rock pools and estuaries. [10] Pagurus novizealandiae is mainly found in the intertidal zones right throughout both the North and South Island, however this species is mostly found in the South Island, or on the Auckland Islands 465 km south-east of New Zealand.