Rhacostoma
Genus of hydrozoans
From Wikipedia, the free encyclopedia
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]
| 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 | |
Morphology
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]
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