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Dissodactylus Pinna
''Dissodactylus'' is a genus of pea crab The pea crab, ''Pinnotheres pisum'', is a small crab in the family Pinnotheridae that lives as a parasite in oysters, clams, mussels, and other species of bivalves. Description Pea crabs are small crustaceans about the size of a pea or dime, wit ...s in the family Pinnotheridae. There are at least 20 described species in ''Dissodactylus''. Species The following 20 species belong to the genus ''Dissodactylus'': References Further reading * External links * Decapods Articles created by Qbugbot {{crab-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pea Crab
The pea crab, ''Pinnotheres pisum'', is a small crab in the family Pinnotheridae that lives as a parasite in oysters, clams, mussels, and other species of bivalves. Description Pea crabs are small crustaceans about the size of a pea or dime, with a "smooth dorsal surface of the carapace, or upper exoskeleton". The exoskeleton of males is hard and circular and has eyes and antennae extending from their fronts, and the chelipeds are more robust in males than in females, which have more elongated chelipeds. The bodies of the female pea crabs are often translucent and show the inner organs and gonads as yellow and red, with the males being a "more yellowish-grey with patches of brown". Ecology The relationship between the pea crab and its host is one of parasitism, rather than commensalism, since the host may be harmed by the crab's feeding activities. The pea crab relies solely on its host for food, safety, and oxygen. Pea crabs have a variety of hosts, the most important of whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinnotheridae
The Pinnotheridae are a family of tiny soft-bodied crabs that live commensally in the mantles of certain bivalve molluscs (and the occasional large gastropod mollusc species in genera such as ''Strombus'' and ''Haliotis''). '' Tunicotheres moseri'' is commensal with a tunicate. The earliest fossils attributable to the Pinnotheridae date from the Danian. Genera and species This is a comprehensive list of species in the family, as of 2008: ;''Abyssotheres'' ;'' Afropinnotheres'' ;'' Alarconia'' ;'' Alain'' *''Alain crosnieri'' *''Alain raymondi'' Ahyong & Ng, 2008 ;''Alainotheres'' ;'' Arcotheres'' *'' Arcotheres alcocki'' *'' Arcotheres arcophilus'' *'' Arcotheres coarctatus'' *'' Arcotheres exiguus'' *'' Arcotheres guinotae'' *'' Arcotheres latifrons'' *'' Arcotheres latus'' *'' Arcotheres modiolicola'' *'' Arcotheres nudifrons'' *'' Arcotheres palaensis'' *'' Arcotheres pernicola'' *'' Arcotheres placunae'' *'' Arcotheres rayi'' *'' Arcotheres rhombifer'' *'' Arcotheres rotunda ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Decapods
The Decapoda or decapods (literally "ten-footed") are an order of crustaceans within the class Malacostraca, including many familiar groups, such as crabs, lobsters, crayfish, shrimp and prawns. 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 (about 3,000 species) and Anomura including hermit crabs, porcelain crabs, squat lobsters (about 2500 species) making up the bulk of the remainder. The earliest fossil decapod is the Devonian ''Palaeopalaemon''. Anatomy Decapods can have as many as 38 appendages, arranged in one pair per body segment. As the name Decapoda (from the Greek , ', "ten", and , '' -pod'', "foot") implies, ten of these appendages are considered legs. They are the pereiopods, found on the last five thoracic segments. In many decapods, one pair of these "legs" has enlarged pincers, called chelae, with the legs bei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
