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On some larval trematode parasites of the mussel (Mytilus edulis) and the cockle (Cardium edule). Part II

A new larval Gymnophallus (Cercaria cambrensis) sp.nov. from the cockle (Cardium edule)

Published online by Cambridge University Press:  06 April 2009

H. A. Cole
H. A. Cole
Affiliation:
Ministry of Agriculture and Fisheries, Conway
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Extract

This trematode was obtained from cockles brought up with mussels to the Conway Mussel Cleansing Station and also from cockles collected from several other localities on the Menai Straits. It was present in every cockle examined, a total of several thousand in all. It occurred as a brown mass of varying size situated immediately beneath the hinge and occupying a small wedge-shaped cavity which occurs there. It could be obtained by cutting away the hinge with a knife when the brown mass was exposed. The latter breaks up very easily on teasing and consists of numerous more or less oval thick-walled sporocysts loosely embedded in the tissue of the cockle. These sporocysts are colourless or slightly straw-coloured and immobile. They contain a varying number of cercariae and a considerable amount of granular brown material. The fully developed cercaria (Fig. 1) is transparent except for the excretory sacs, which are full of very highly refractive granules and appear dark. The maximum diameter of these granules has been put forward by Rothschild (1935) as a valuable diagnostic character; in this species it is 5μ. The cercariae are moderately active and survive some time in sea water after removal from the sporocyst. This trematode was found throughout the year.

Type
Research Article
Information
Parasitology , Volume 30 , Issue 1 , January 1938 , pp. 40 - 43
Copyright
Copyright © Cambridge University Press 1938

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References

REFERENCES

Cole, H. A. (1935). On some larval trematode parasites of the mussel (Mytilas edulis) and the cockle (Cardium edule). Parasitology, 27, 276–80.CrossRefGoogle Scholar
Dollfus, R. Ph. (1923). Le trématode des perles de nacre des moules de Provence. C. R. Acad. Sci., Paris, 176, 1427–9.Google Scholar
Dubois, R. (1901). Sur le mécanisme de la formation des perles fines dans le Mytilus edulis . C. R. Acad. Sci. 133, 603.Google Scholar
Jameson, H. L. (1902). On the origin of Pearls. Proc. zool. Soc., Lond., 140–66.Google Scholar
Jameson, H. L. & Nicoll, W. (1913). On some parasites of the Scoter duck (Oedemia nigra) and their relation to the pearl-inducing trematode in the edible mussel (Mytilus edulis). Proc. zool. Soc., 53–63.CrossRefGoogle Scholar
Lebour, M. V. (1912). A review of British marine cercariae. Parasitology, 4, 416–56.CrossRefGoogle Scholar
Nicoll, W. (1906). Notes on trematode parasites of the cockle and mussel. Ann. Mag. nat. Hist. (7), 17, 148–55.CrossRefGoogle Scholar
Palombi, A. (1923). Le cercarie del genere Gymnophallus (Odhner) dei Mitili . Pubbl. Staz. zool. Napoli, Vol. 5.Google Scholar
Rothschild, M. (1935). The trematode parasites of Turritella communis (Link.) from Plymouth and Naples. Parasitology, 27, 152–70.CrossRefGoogle Scholar
Ssinitzin, D. F. (1911). Mém. Acad. Sci. St.-Pétersb. (8), 30, 38–126. (In Russian.)Google Scholar