from Wikipedia, the free encyclopedia
Blueprint of a decapod . The cephalothorax is the area marked in yellow from the cephalon and thorax

Cephalothorax ( ancient Greek κεφαλή kephalé , German 'head' and ancient Greek θώραξ thórax , German 'breast part' ) denotes the intrinsically immobile front body of the higher crabs (Malacostraca). It is covered by the carapace extending from the head .


In decapods , the cephalothorax consists of the head ( cephalon ) and the chest section ( thorax ). In many other malacostraca only one or two thorax segments are fused with the head to form a cephalothorax, the sequence cephalothorax - peraeon - pleon / abdomen (e.g. in satchel cancers ). Such a fusion of head and thorax also exists in some jaw-bearers (chelicerates, e.g. horseshoe crabs ).


The part of the cephalothorax of the Decapoda carrying the (5) striding legs ( peraeopods ) is also called the peraeon.

The forelegs of arachnids are sometimes referred to as the "cephalothorax". This is incorrect because it is a movable fore-abdomen which is correctly called a prosoma . Opisthosoma is also used synonymously and incorrectly .

In other arthropods, such as trilobites (extinct), hexapods and insects , the head can move freely against the thorax.

See also

Tagma (anatomy)


Web links

Wiktionary: Cephalothorax  - explanations of meanings, word origins, synonyms, translations

Single receipts

  1. Timothy J. Gibb & CY Oseto: Glossary . In: Arthropod Collection and Identification: Field and Laboratory Techniques . Academic Press, 2006, ISBN 978-0-12-369545-1 .
  2. Eldra Pearl Solomon, Linda R. Berg & Diana W. Martin: Tha animal kingdom: an introduction to animal diversity . In: Biology , 7th. Edition, Cengage Learning, 2004, ISBN 978-0-534-49276-2 , pp. 534-549.
  3. Andrew J. Martinez: Arthropoda (crabs, shrimps, lobsters) . In: Marine Life of the North Atlantic: Canada to New England , 3rd. Edition, Aqua Quest Publications, 2003, ISBN 978-1-881652-32-8 , pp. 144-175.
  4. ^ Science online lexica: Entry on Pereion in the lexicon of biology. Retrieved October 13, 2009
  5. ^ Kükenthal - Zoological internship, ISBN 3827419980