Large crabs

Large crabs
	lobster
Systematics
Trunk :	Arthropod (arthropoda)
Class :	Higher crabs (Malacostraca)
Order :	Decapods (decapoda)
Subordination :	Pleocyemata
Partial order :	Large crabs
Scientific name
	Astacidea
	Latreille , 1802

Norway lobster
( Nephrops norvegicus )

The large crabs ( Astacidea) are a suborder of the higher crayfish (Malacostraca). Because of their best-known members, they are also called crayfish and lobster-like in German .

features

All large crabs have a relatively robust build. Your carapace is cylindrical. It only has a connection with the sternum behind the mouth opening . The abdomen ends in a pronounced, wide tail fan. The first pair of legs is greatly enlarged and has powerful, heavy scissors. The second and third pair of legs also wear scissors, albeit much smaller. The gills are made of unbranched filaments.

Systematics

Superfamilies and families:

Crayfish (Astacoidea)
- Astacidae
- Cambaridae
Enoplometopoidea
- Reef Lobster (Enoplometopidae)
Nephropoidea
- Lobster-like (Nephropidae)
Parastacoidea
- Parastacidae

swell

SA Fosså, & AJ Nilsen: Coral reef aquarium. Volume 6, Birgit Schmettkamp Verlag, Bornheim 1998, ISBN 3-928819-18-6

Individual evidence

↑ Sammy De Grave, N. Dean Pentcheff, Shane T. Ahyong et al .: A classification of living and fossil genera of decapod crustaceans . In: Raffles Bulletin of Zoology . Supplement No. 21. 2009, p. 1–109 ( pdf 7.73Mb [accessed February 18, 2012]).

Web links

Commons : Astacidea - collection of images, videos and audio files

[Grave-1] Sammy De Grave, N. Dean Pentcheff, Shane T. Ahyong et al .: A classification of living and fossil genera of decapod crustaceans . In: Raffles Bulletin of Zoology . Supplement No. 21. 2009, p. 1–109 ( pdf 7.73Mb [accessed February 18, 2012]).