Large crabs
Large crabs | ||||||||||
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lobster |
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Systematics | ||||||||||
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Scientific name | ||||||||||
Astacidea | ||||||||||
Latreille , 1802 |
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)
- Enoplometopoidea
- Reef Lobster (Enoplometopidae)
- Nephropoidea
- Lobster-like (Nephropidae)
- Parastacoidea
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