Rhacostoma
| Rhacostoma | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Cnidaria |
| Class: | Hydrozoa |
| Order: | Leptothecata |
| Family: | Aequoreidae |
| Genus: | Rhacostoma L. Agassiz, 1850 |
| Species: | R. atlanticum |
| Binomial name | |
| Rhacostoma atlanticum L. Agassiz, 1850 | |
Rhacostoma is a genus of aequoreid hydrozoans. It is monotypic with a single species, Rhacostoma atlanticum Or Lined Water Jellyfish. It has been reported from the Atlantic coastline of North America, Colombia, western and central Africa.[1] The polyp stage is stolonal, with a tubular hydrotheca and 15 moniliform tentacles when completely extend.[2]
Morphology
[edit]The medusae reach up to 30–40 cm (12–16 in) in diameter with the bell height 3–4 times less than the width.[1] Specimens found in the northern waters tend to be transparent, while those found further south are tinted pink.[3] The broad stomach gives rise to 80–100 non-branching radial canals.[1] Tentacles are slightly more numerous than radial canals and possess elongated conical bulbs.[1]
References
[edit]- 1 2 3 4 Kramp, P. L. (1961). Synopsis of the medusae of the world. Journal of the Marine Biological Association of the United Kingdom 40: 1–469. P. 210 The full text Archived 2011-09-30 at the Wayback Machine
- ↑ Resgalla, C.; Petri, L.; da Silva, B. G. Teodoro; Brilha, R. T.; Araújo, S. A.; Almeida, T. C. M. (2019-06-20). "Outbreaks, coexistence, and life cycle of jellyfish species in relation to abiotic and biological factors along a South American coast". Hydrobiologia. 839 (1): 87–102. doi:10.1007/s10750-019-03998-0. ISSN 0018-8158.
- ↑ Goodwin, G., Bogert, C. M., Gilliard, E., Coates, C. W. The Illustrated Encyclopedia of Animal Life. Odham Books, 1961, vol. 13, p. 1666.
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