Gymnolaemata
Gymnolaemata | ||||||||||||
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Systematics | ||||||||||||
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Scientific name | ||||||||||||
Gymnolaemata | ||||||||||||
Allman , 1856 |
The Gymnolaemata form a class of bog animals (Ectoprocta, also known as Bryozoa), which occurs in salt water ( marine ) and fresh water (limnic). This class includes two orders , the Ctenostomata , with approx. 50 genera , and the Cheilostomata , with approx. 600 genera.
construction
The mostly marine Gymnolaemata form the most species-rich class with around 650 genera. The cystids are usually box or cornucopia-shaped. The animals of the colony are separated by partitions with pores filled with tissue. There are no body wall muscles. The Gymnolaemata are again divided into two orders: The walls of the Ctenostomata (approx. 50 genera) are membranous or gelatinous. They have no ooecia or avicularia. The cystid closure is achieved by folding a membranous collar and the individual animals are largely isolated. The walls of the cheilostomata (approx. 600 genera) are calcified and the cystid has a lid closure. Heterozoids are common and embryonic development takes place in brood chambers.
Systematics
- Class: Gymnolaemata
- Order: Ctenostomata
- Subordination: Alcyonidiina
- Subordination: Flustrellidrina
- Subordination: Victorellina
- Suborder: Paludicellina
- Suborder: Vesicularina
- Subordination: Stoloniferina
- Order: cheilostomata
- Subordination: Inovicellata
- Subordination: Scrupariina
- Subordination: Malacostega
- Subordination: Flustrina
- Subordination: Ascophora
- Order: Ctenostomata
Web links
swell
- Rieger, Reinhard; Westheide, Wilfried: Special Zoology 1 Spectrum; Stuttgart 2006; ISBN 3827415756
- Hennig, Dr. Willi: Invertebrates I. Pocket book of special zoology. Jena: Fischer 1994; ISBN 3825218317
- Remane, Adolf; Storch, Volker; Welsch, Ulrich: Systematic Zoology. Berlin: Spectrum Academic Publishing House 2003; ISBN 3827411122