Reptantia


Reptantia

The Reptantia is a group of decapod crustaceans, including lobsters, crabs and many other well-known creatures. In older classifications, Reptantia is a sub-order alongside Natantia, with Reptantia containing the walking forms, and Natantia the swimming forms (prawns, shrimp and boxer shrimp). This classification is no longer valid, however, and Reptantia is now a clade within the sub-order Pleocyemata.

The name Reptantia means "those that walk", and contains those decapods whose primary mode of locomotion is to walk along a surface using the pereiopods rather than swimming through the water with the pleopods. Despite this, many reptants are able to propel themselves through the water, and many natants can and will walk.

Although relationships within the Reptantia are still somewhat unclear, a number of groups can be identified (fossil groups are not considered here):

* Polychelidae - blind, deep-sea animals with long pincers
* Achelata - a group comprising spiny lobsters, slipper lobsters and furry lobsters, all of which lack claws
* Glypheoidea - a group of lobster-like animals thought to be extinct until the discovery of "Neoglyphea inopinata" in 1975
* Astacidea - true (clawed) lobsters, including reef lobsters, along with freshwater crayfish
* Thalassinidea - a group of delicate, burrowing animals, variously known as "mud lobster" and "ghost shrimp"
* Anomura - hermit crabs, king crabs, porcelain crabs, squat lobsters, hippoids and a couple of other unusual animals
* Brachyura - true crabs----Reptantia is also used for a group of nemertean worms.


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Look at other dictionaries:

  • Reptantia — Rep*tan ti*a (r?p t?n sh? ?), n. pl. [NL.] (Zo[ o]l.) A division of gastropods; the Pectinibranchiata. [1913 Webster] …   The Collaborative International Dictionary of English

  • Reptantia — noun lobsters; crabs • Syn: ↑suborder Reptantia • Hypernyms: ↑animal order • Member Holonyms: ↑Decapoda, ↑order Decapoda • Member Meronyms: ↑ …   Useful english dictionary

  • reptantia — A division of the decapod crustacea by Boas (1880) on which the carpoprodal articulation of the pereiopods has two fixed points of attachment and the pleopods are often reduced or may be absent. Used as a suborder of the Decapods in many… …   Crustacea glossary

  • reptantia — rep·tan·tia …   English syllables

  • suborder Reptantia — noun lobsters; crabs • Syn: ↑Reptantia • Hypernyms: ↑animal order • Member Holonyms: ↑Decapoda, ↑order Decapoda • Member Meronyms: ↑ …   Useful english dictionary

  • Pleocyemata — Taxobox name = Pleocyemata image width = 250px image caption = American lobster, Homarus americanus regnum = Animalia phylum = Arthropoda subphylum = Crustacea classis = Malacostraca ordo = Decapoda subordo = Pleocyemata subordo authority =… …   Wikipedia

  • Nemertea (classification phylogenetique) — Nemertea (classification phylogénétique) Cette page a pour objet de présenter un arbre phylogénétique des Nemertea (ou Némertes), c est à dire un cladogramme mettant en lumière les relations évolutives complexes (relations groupes ancestraux… …   Wikipédia en Français

  • Nemertea (classification phylogénétique) — Cette page a pour objet de présenter un arbre phylogénétique des Nemertea (Némertes, Némertiens, Vers rubanés), c est à dire un cladogramme mettant en lumière les relations de parenté existant entre leurs différents groupes (ou taxa), telles que… …   Wikipédia en Français

  • Natantia — is an obsolete taxon of decapod crustaceans, comprising those families that move predominantly by swimming – the shrimp, prawns and boxer shrimp. The remaining Decapoda were placed in the Reptantia, and consisted of crabs, lobsters and other… …   Wikipedia

  • MALACOSTRACÉS — Des deux grands groupes de Crustacés reconnus par Latreille en 1806, les Entomostracés et les Malacostracés, seul le second continue à être accepté par les zoologistes contemporains comme un ensemble d’animaux présentant des traits fondamentaux… …   Encyclopédie Universelle


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