A new leech-infesting cercaria from Duddingston Loch, Edinburgh

Lal, M. B. (1959) A new leech-infesting cercaria from Duddingston Loch, Edinburgh Nature, 183 (4662). pp. 697-698. ISSN 0028-0836

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Official URL: http://www.nature.com/nature/journal/v183/n4662/ab...

Related URL: http://dx.doi.org/10.1038/183697b0


Valvata piscinalis, a common snail in the Duddingston Loch, Edinburgh, was found infected with a new furcocercous cercaria. Of 758 snails examined, 19 were found infected. This cercaria, which is named Cercaria valvatae n.sp., develops in long tubular sporocysts forming a tangled mass in the hepatopancreas of the snail. With the proliferation of the germ balls the tubular sporocyst becomes constricted into sausage-shaped swellings containing developing cercariae. The abbreviated specific diagnosis of Cercaria valvatae n.sp. (Fig. 1) is as follows.

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