Thecostraca

Thecostraca
Barnacles
Systematics
Over trunk : Molting animals (Ecdysozoa) Trunk : Arthropod (arthropoda) Sub-stem : Crustaceans (Crustacea) Class : Maxillopoda Subclass : Thecostraca
Scientific name
Thecostraca
Gruvel , 1905

The Thecostraca ( size : capsule shell) are a subclass of marine crustaceans that, as adults, have an appearance that differs greatly from the classic form of crustacean . They live worldwide in the sea or in brackish water. Known groups are the sessile living barnacles and barnacles that feed by filtration. There are also parasitic representatives.

features

Because of the strongly derived body of the adult animals, the Thecostraca can only be characterized as monophylum through the characteristics of their larvae . Your cypris larvae have a five-pair lattice organ on both sides of the carapace center line . The lattice organ is a sense organ that presumably has a chemosensory effect. It consists of an elongated chamber covered with cilia, which is connected to the outside via many pores or a large terminal pore. The first pair of antennae of the cypris larvae is used for attachment when transitioning to a sessile or parasitic way of life.

Internal system

Thecostraca Gruvel, 1905

• Subclass facetotecta Grygier, 1985
• Subclass Ascothoracida Lacaze-Duthiers, 1880
  • • Order Laurida Grygier, 1987
    • Order Dendrogastrida Grygier, 1987
• Subclass barnacles (Cirripedia) Burmeister, 1834
  • Superorder Acrothoracica Gruvel, 1905
    • Order Pygophora Berndt, 1907
    • Order Apygophora Berndt, 1907
  • Superordinate root shrimp (Rhizocephala) Müller, 1862
    • Order Kentrogonida Delage, 1884
    • Order Akentrogonida Häfele, 1911
  • Superorder Thoracica Darwin , 1854
    • Order Pedunculata Lamarck , 1818
    • Order Sessilia Lamarck, 1818

literature

• Hynek Burda , Gero Hilken, Jan Zrzavý: Systematic Zoology. UTB, Stuttgart; : 1st edition 2008, pages 193–194, ISBN 3825231194
• Kurt Schminke: Crustacea, Krebse , page 598 in Wilfried Westheide & Reinhard Rieger (eds., 2007): Special Zoology - Part 1: Protozoa and Invertebrates (2nd edition). Elsevier, Spektrum Akademischer Verlag, Munich. ISBN 3-8274-1575-6

Web links

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

• WoRMS (2010). Thecostraca. World Register of Marine Species