Phlebobranchia
| Phlebobranchia | ||||||||||||
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Diplosoma virens |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Phlebobranchia | ||||||||||||
| Lahille , 1886 |
The phlebobranchia ( size : gill intestine with vessels) are sessile- living tunicates (Tunicata, Urochordata) and are therefore counted in the traditional system to the class of " sea squirts " (Ascidiacea). Many species of the phlebobranchia live in shallow water. However, they also include the carnivorous deep-sea species of the Octacnemidae family that live on larger prey.
features
Most of the species in the group are solitary and grow to be relatively large. Species that form animal hives , which have to reproduce asexually to form the hives, are found in the families Diazonidae and Perophoridae. The gill intestine of the phlebobranchia pass through longitudinal folds. The gill gut runs to the right of the intestinal loop, which runs along with the gonads on the left. In the Corellidae family it is the other way round. The phlebobranchia larvae are simply built and develop in free water.
External system
According to DNA sequence analyzes, the sea squirts do not form a monophylum . A cladogram shows the probable actual relationship of the tunicates. The Phlebobranchia are the sister group of the Salps (Thaliacea).
| Tunicates |
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Familys
- Agnesiidae Michaelsen, 1898
- Ascidiidae Herdman, 1882
- Cionidae Lahille, 1887
- Corellidae
- Diazonidae Garstand, 1891
- Hypobythiidae Sluiter, 1895
- Octacnemidae
- Perophoridae Giard, 1872
- Plurellidae Kott, 1973
literature
- Wilfried Westheide & Reinhard Rieger: Special Zoology Part 1: Protozoa and Invertebrates , 2nd Edition, Spectrum Academic Publishing House Heidelberg • Berlin, 2007, ISBN 3-8274-1575-6
Web links
- Gittenberger, A., Monniot, C. (2010). Phlebobranchia . In: World Ciliophora Database. World Register of Marine Species Phlebobranchia