Malacostraca

California spiny lobster

The Higher crustaceans ( Malacostraca ) are approximately 28,000 species, the largest group within the crustaceans and include most animals that recognize non-experts than crustaceans, such as crabs, lobsters, crayfish and shrimp. They have been documented as early as the time of the Cambrian in the fossil record.

Anatomy

  • The head ( cephalon ) consists of 6 segments with two pairs of antennae and mandibles, 1st and 2nd maxillae as mouthparts. The two antenna- bearing segments and the segment before being fused together.
  • 8 thoracic segments each with a pair of legs ( Peraeopoden ).
  • 6 abdominal segments. The limbs ( pleopods ) on the abdomen ( pleon ) originally a float function.
  • Eyes are originally on mobile stalks.
  • A zweikammeriger stomach, from filtering and gizzard in the back part of the foregut.
  • Central nervous system.

System

The class of Higher crayfish is divided into three classes with a total of 16 orders. A more detailed description of the system is located in the systematics of Higher cancers.

  • Subclass Eumalacostraca Superorder Eucarida order Amphionidacea
  • Order decapods ( Decapoda )
  • Order euphausiid (Euphausiacea )
  • Order amphipods ( Amphipoda )
  • Order Cumacea
  • Order isopods ( Isopoda )
  • Order Lophogastrida
  • Order Mictacea
  • Rules suspended shrimp ( Mysida )
  • Order Spelaeogriphacea
  • Order shear isopods ( Tanaidacea )
  • Order Thermosbaenacea
  • Order Anaspidacea
  • Ok well crabs ( Bathynellacea )
  • Order mantis shrimp ( Stomatopoda )

Swell

  • Richter, S. & G. Scholtz: Phylogenetic analysis of the Malacostraca (Crustacea ). In: J. Zool. Syst. Evol. Research. 39 2001: 113-136
Body plan Mandible (insect mouthpart) Arthropod mouthparts
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