(Kramp, 1919)

Description
Umbrella diameter up to ca 40 mm, when full grown much flatter than a hemisphere, jelly fairly thick, velum said to be broad.
Stomach very small. Mouth with four pointed, more or less crenulate lips. Radial canals four, straight; ring canal narrow [C.islandica-medusa].
Gonads on radial canals very long, narrow, extending from near base of stomach to near ring canal; without median furrow.
Marginal tentacles up to ca 200, hollow, bases swollen [C.islandica-umbrella margin]. No cirri. Marginal vesicles closed, about same number as marginal tentacles; number of concretions in each not known.

Size
Diameter of medusa up to ca 40 mm.

Distribution in the North Sea
Northern North Sea.

World distribution
So far recorded from only part of the North Atlantic Ocean: northern North Sea, the Shetland-Faeroes-Iceland region, and the British Isles (Russell, 1963c; Fraser, 1972).
Notes —The full distribution of this little-known species may prove wider than yet known.

Remark
Hydroid unknown.

[After Cornelius, 1995b]

Kingdom Animalia
Phylum Cnidaria
Superclass Hydrozoa
Class Leptolida
Subclass Leptothecatae
Order Proboscoida
Suborder Campanulariida
Superfamily Campanularioidea
Family Campanulariidae
Subfamily Clytiinae
Genus Clytia
Species Clytia islandica

Status in World Register of Marine Species

Accepted name: Clytia islandica (Kramp, 1919)

Scientific synonyms and common names

Phialidium islandicum | Kramp, 1919

Cornelius, P.F.S., 1995b. North-West European thecate hydroids and their Medusae. Part 2. Synopses of the British Fauna (New Series), No 50.

Fraser, J.H., 1972. The distribution of the Medusae in the Scottish area. Proceedings of the Royal Society of Edinburgh (B) 74(1): 1-25.

Kramp, P.L. and D. Damas, 1925. Les Méduses de la Norvège. Videnskabelige Meddelelser fra Dansk naturhistorisk Forening i København 80: 217-323.

Russell, F.S., 1953a. The medusae of the British Isles. Anthomedusae, Leptomedusae, Limnomedusae, Trachymedusae, and Narcomedusae. Cambridge University Press, 530 pp. 319 figures, 35 plates.

Russell, F.S., 1963c. Hydromedusae. Families: Campanulariidae, Lovenellidae, Phialellidae. Fiches d'Identification du Zooplancton, 101 (1963). Conseil International pour l'Exploration de la Mer, Kopenhagen.

You can continue searching for Clytia islandica on one of these Web sites:

Fauna Europaea (animals) | IOPI (plants) | NCBI (genetic)

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