Phlebobranchia

Diplosoma virens

The Phlebobranchia (Size: gills and intestine with vessels) are sessile live tunicates ( Tunicata, Urochordata ) and ( Ascidiacea ) are used in traditional systematics therefore to the class of " sea squirts " are counted. Many types of Phlebobranchia live in shallow water. To them, however, include the carnivorous, living on larger prey deep-sea species of Octacnemidae family.

Features

Most species of the group are solitary and are relatively large. Animal poles forming species to reproduce asexually to form the poles, there are with the families and Diazonidae Perophoridae. The gills and intestine of Phlebobranchia through longitudinal wrinkles. The gills and intestine runs to the right of the intestinal loop, which thus runs along with the gonads left. When Corellidae family situation is reversed. The larvae of Phlebobranchia are built simply and evolve in open water.

Outer systematics

The sea squirts do not form a monophyletic group by DNA sequence analysis. A cladogram shows the probable actual relationship of tunicates. The Phlebobranchia are the sister group of salps ( Thaliacea ).

Stolidobranchia ( " sea squirts " )

Phlebobranchia ( " sea squirts " )

Salps ( Thaliacea )

Aplousobranchia ( " sea squirts " )

Appendikularien ( Larvacea )

Families

  • Agnesiidae Michaelsen, 1898
  • Ascidiidae Herdman, 1882
  • Cionidae Lahille, 1887
  • Corellidae
  • Diazonidae Garstand, 1891
  • Hypobythiidae Sluiter, 1895
  • Octacnemidae
  • Perophoridae Giard, 1872
  • Plurellidae Kott, 1973
Human gonad
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