Kramp and Dumas, 1925

Description
Umbrella about as high as wide; jelly fairly thick [P.crocea-habitus1 ]. Four radial canals with lateral diverticula in which gonads are placed.
Manubrium large, cruciform with funnel-shaped perradial lobes; mouth rim slightly folded, four short lips; the proximal 1/2 – 2/3 of the length of the radial canals is high and laterally compressed with gonads in 6-7 lateral, free lamellae on each side [P.crocea-habitus2 ].
Marginal cirri absent. About 64 hollow tentacles with slight abaxial endodermal spurs; 2-4 cordyli between tentacles, each with distal nematocysts; without ocelli.

Size
Umbrella 25 mm wide and high.

Colour
Saffron.

Ecology and depth range
Slope species.

Distribution in the North Sea
Northern North Sea off Norwegian coast (Mangerfjord, Herdlafjord).

World distribution
NE North Atlantic Ocean.

Remark
Hydroid stage unknown.

[After Kramp, 1959; Kramp, 1961; Russell, 1963a]

Kingdom Animalia
Phylum Cnidaria
Superclass Hydrozoa
Class Leptolida
Subclass Leptothecatae
Order Conica
Suborder Campanulinida
Superfamily Laodiceoidae
Family Laodiceidae
Genus Ptychogena
Species Ptychogena crocea

Status in World Register of Marine Species

Accepted name: Ptychogena crocea Kramp & Damas, 1925

Sorry, there are no scientific synonyms and common names available for this species

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.

Kramp, P.L., 1959. The hydromedusae of the Atlantic Ocean and adjacent waters. Dana Report 46: 1-283; 2 plates, 335 text figures.

Kramp, P.L., 1961. Synopsis of the medusae of the world. Journal of the Marine Biological Association of the United Kingdom 40: 1-469.

Russell, F.S., 1963a. Hydromedusae. Families: Dipleurosomatidae, Melicertidae, Laodiceidae. Fiches d'Identification du Zooplancton, 99 (1963). Conseil International pour l'Exploration de la Mer, Kopenhagen.

You can continue searching for Ptychogena crocea on one of these Web sites:

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