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Cercaria turritellae n.sp., A ‘huge-tailed’ monostome larva from Turritella communis Risso

Published online by Cambridge University Press:  11 May 2009

Robert F. Hutton
Robert F. Hutton
Affiliation:
The University of Florida Field Station, St Petersburg, Florida, U.S.A
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Extract

Rothschild (1935) reported that Dr M. V. Lebour drew her attention to a ‘huge-tailed’ monostome which had occurred during 1931 in specimens of Turritella communis collected from the Rame Mud, Plymouth. From 1932 to 1934 Rothschild (1935) examined 541 specimens of this gastropod from that locality without finding this larva. During the summer of 1952, the present author examined a number of specimens from the same locality and was also unsuccessful in finding such a larval trematode. However, in November 1952, the monostome described below was found in two of 110 Turritella collected from Cawsand Bay, Plymouth Sound.

The author wishes to express his indebtedness to the Director and Staff of the Plymouth Laboratory of the Marine Biological Association for their friendly co-operation and assistance in all phases of this work. The work was carried out while the author was holding a Fulbright Scholarship.

METHODS

Fully developed cercariae were obtained by isolating infeaed specimens of T. communis in jars of sea water and allowing the cercariae to emerge. Rediae and immature cercariae were obtained by crushing the shells of the hosts. Living specimens as well as permanent preparations were studied. Whole mounts were fixed in sublimate, stained with borax-carmine, and mounted in Canada balsam, or fixed in sublimate or formalin, unstained, and mounted in Faure's medium or in Cristalite (E. Gurr). Serial sections (5 /x) of several cercariae were stained with Ehrlich's haematoxylin and eosin. The orientation of the objects in the desired position at imbedding was achieved by the method of Peterfi (after Romeis, 1948, p. 99). The incidence of infection was determined by crushing the gastropods and examining the digestive glands and gonads under the dissecting microscope.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 34 , Issue 2 , June 1955 , pp. 249 - 255
Copyright
Copyright © Marine Biological Association of the United Kingdom 1955

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References

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