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The decapod (crustaceans, such as a crab, lobster, shrimp or prawn) is made up of 20 body segments grouped into two main body parts: the cephalothorax and the pleon (). [1] [2] Each segment may possess one pair of appendages, although in various groups these may be reduced or missing.
The Decapoda or decapods (lit. ' ten-footed ') is a large order of crustaceans within the class Malacostraca, and includes crabs, lobsters, crayfish, shrimp, and prawns. Most decapods are scavengers. The order is estimated to contain nearly 15,000 extant species in around 2,700 genera, with around 3,300 fossil species. [1]
The crab infraorder Brachyura belongs to the group Reptantia, which consists of the walking/crawling decapods (lobsters and crabs). Brachyura is the sister clade to the infraorder Anomura , which contains the hermit crabs and relatives.
Crab Museum claims to be Europe's first and only exhibition area dedicated to the decapod's world. ... anatomy and biodiversity.
In many decapods, the first (and sometimes the second) pair of pleopods are specialised in the male for sperm transfer. Many terrestrial crustaceans (such as the Christmas Island red crab) mate seasonally and return to the sea to release the eggs.
King crabs are decapod crustaceans of the family Lithodidae [b] that are chiefly found in deep waters and are adapted to cold environments. [2] [3] They are composed of two subfamilies: Lithodinae, which tend to inhabit deep waters, are globally distributed, and comprise the majority of the family's species diversity; [3] [4] and Hapalogastrinae, which are endemic to the North Pacific and ...
Hermit crabs are anomuran decapod crustaceans of the superfamily Paguroidea that have adapted to occupy empty scavenged mollusc shells to protect their fragile exoskeletons. [1] [2] [3] There are over 800 species of hermit crab, most of which possess an asymmetric abdomen concealed by a snug-fitting shell.
Pleocyemata is a suborder of decapod crustaceans, erected by Martin Burkenroad in 1963. [1] Burkenroad's classification replaced the earlier sub-orders of Natantia and Reptantia with the monophyletic groups Dendrobranchiata (prawns) and Pleocyemata.