Girish Mahajan (Editor)

Astacidea

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Kingdom
  
Animalia

Subphylum
  
Crustacea

Scientific name
  
Astacidea

Rank
  
Infraorder

Phylum
  
Arthropoda

Suborder
  
Pleocyemata

Higher classification
  
Pleocyemata

Astacidea Yabbie Genus Cherax Infraorder Astacidea family Parastac Flickr

Lower classifications
  
Lobster, Cherax, Parastacidae, Glypheoidea, Paranephrops

Astacidea is a group of decapod crustaceans including lobsters, crayfish and their close relatives.

Contents

Members

Astacidea tolweborgtreeToLimagesFdevastatorjpeg

The infraorder Astacidea comprises five extant superfamilies, two of crayfish (Astacoidea and Parastacoidea), one of true lobsters (Nephropoidea), one of reef lobsters (the genus Enoplometopus), and a number of fossil taxa. As of 2009, the group contains 782 recognised species, over 400 of which are in the crayfish family Cambaridae. The members of the infra-order Glypheidea (containing numerous fossils and the two extant species Neoglyphea inopinata and Laurentaeglyphea neocaledonica) was formerly included here.

Description

Astacidea Index of treeeukaryotesanimalsarthropodacrustaceadecapoda

Members of the infraorder Astacidea are distinguished from most other decapods by the presence of chelae (claws) on each of the first three pairs of pereiopods (walking legs), the first of which is much larger than the remaining two pairs. The last two pairs of pereiopods are simple (without claws), except in Thaumastocheles, where the fifth pereiopod may have "a minute pincer".

Distribution

Astacidea Astacidea Wikipdia

Members of the infraorder Astacidea are found throughout the world – both in the oceans and in fresh water – except for mainland Africa and parts of Asia.

Astacidea Lobsters AstacideaPalinurideaThalassinidea My Hawaiian Images

Astacidea Decapoda

References

Astacidea Wikipedia