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The Hydroids and the Medusae Podocoryne Areolata, P. Borealis and P. Carnea

Published online by Cambridge University Press:  11 May 2009

C. Edwards
C. Edwards
Affiliation:
Dunstaffnage Marine Research Laboratory, Oban, Argyll
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Extract

Three species of medusae of the genus Podocoryne M. Sars have been collected in the Clyde Sea Area: P. hartlaubi Neppi & Stiasny, P. borealis (Mayer) and P. camea M. Sars. Their hydroids have also been found there, and medusae liberated in the laboratory have been reared to maturity. Detailed illustrated accounts of the hydroids and of the developmental stages of the medusae are given.

The hydroid of P. hartlaubi proves to be identical with the hydroid Podocoryne areolata (Alder), a species long known to liberate medusae, which however have not previously been referred with certainty to any known species of medusa. By priority the name P. areolata has seniority over P. hartlaubi and applies to both hydroid and medusa. The hydroid P. hartlaubi reported from Naples by Yamada is discussed, and is considered to be identical with P. areolata. In the Clyde Sea Area the hydroid has been found only on certain small gastropod shells occupied by hermit-crabs.

The hydroid of P. borealis has hitherto been very inadequately known. The hydroid is very common in the Clyde Sea Area, living on a variety of host animals on muddy grounds. Colonies have also been reared in the laboratory from ripe medusae caught in the sea. Abundant material has accordingly been obtained, making possible a full description of the species.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 52 , Issue 1 , February 1972 , pp. 97 - 144
Copyright
Copyright © Marine Biological Association of the United Kingdom 1972

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