Paracoryne huvei
| Paracoryne huvei | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name of the family | ||||||||||||
| Paracorynidae | ||||||||||||
| Picard , 1957 | ||||||||||||
| Scientific name of the genus | ||||||||||||
| Paracoryne | ||||||||||||
| Picard , 1957 | ||||||||||||
| Scientific name of the species | ||||||||||||
| Paracoryne huvei | ||||||||||||
| Picard , 1957 |
Paracoryne huvei is a species of the hydrozoa (Hydrozoa) from the tribe of the cnidarians (Cnidaria) that lives exclusively in the sea. It is the only species in the genus Paracoryne Picard, 1957, which in turn is the only genus in the Paracorynidae Picardfamily, 1957. The species is endemic to the western Mediterranean.
features
The hydroid polyps form flat, rounded, pink-colored colonies, the hydrant of which consist of gastrozooids (feeding polyps), gonozooids (sexual polyps) and dactylozooids (defense polyps). The basal plate of the colony is divided into an upper layer with large gastrodermal cavities and a lower layer with large, parenchymatic gastrodermal cells, which continue into the dactylozooids. The basal plate is surrounded by a layer of epidermis . The gastrozooids are relatively short and thick, with one to four rings of solid, buttoned tentacles. The gonozooids are short and have neither tentacles nor a mouth. They carry cryptomedusoid gonophores . The eggs develop into actinula larvae or into encapsulated survival stages within the gonophores. The dactylozooids are long, finger-shaped and positioned around the edge of the colony.
Geographical distribution and habitat
The species is endemic to the western Mediterranean. It lives in the intertidal zone above the middle waterline on rocky coasts on rocks or on mussel shells.
Way of life
The populations of this species appear to be subject to great fluctuations. Before it was first described , the species must have been very rare, as the very conspicuous, distinctive colonies had not been found by any researcher in the relatively well-studied Mediterranean before 1957. In the 1970s and 1980s the species became relatively common and has been described many times. Then the species disappeared again completely and since then can no longer be detected at the earlier sites. The presence of persistence stages with very long diapause in the life cycle of this species could explain the sudden appearance and disappearance of this species.
Systematics
The species was first described by Jacques Picard in 1957. He also proposed a new genus and family. So far, genus and family have remained monotypical .
swell
literature
- Jean Bouillon, Cinzia Gravili, Francesc Pagès, Josep-Maria Gili and Fernando Boero: An introduction to Hydrozoa. Mémoires du Muséum national d'Histoire naturelle, 194: pp. 1–591, Publications Scientifiques du Muséum, Paris 2006 ISBN 978-2-85653-580-6
- Marymegan Daly, Mercer R. Brugler, Paulyn Cartwright, Allen G. Collin, Michael N. Dawson, Daphne G. Fautin, Scott C. France, Catherine S. McFadden, Dennis M. Opresko, Estefania Rodriguez, Sandra L. Romano and Joel L. Stake: The phylum Cnidaria: A review of phylogenetic patterns and diversity 300 years after Linnaeus. Zootaxa, 1668: pp. 127-182, Wellington 2007 ISSN 1175-5326 Abstract - PDF
On-line
Individual evidence
- ^ Jean Bouillon, Maria Dolores Medel, Francesc Pagès, Josep-Maria Gili, Fernando Boero and Cinzia Gravili: Fauna of the Mediterranean Hydrozoa. Scientia Marina, 68 (Suppl. 2): pp. 5-438, 2004 PDF
- ^ Jacques Picard: Étude sur les hydroïdes de la superfamille Pteronematoidea, 1st Généralités. Bulletin de l'Institut Océanographique de Monaco, 1106: pp. 1-12, 1957.
- ↑ World Hydrozoa Database ( Memento of the original from March 4, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
