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The morphology and behaviour of Cercaria lata Lespés, 1857 (Digenea, Faustulidae) from the Mediterranean clam Tapes decussata (L.)

Published online by Cambridge University Press:  01 March 2009

L. Gargouri Ben Abdallah*
Affiliation:
Department of Biology, Faculty of Science, Tunis, Tunisia
N. Trigui El Menif
Affiliation:
Department of Biology, Faculty of Science, Bizerte, Tunisia
F. Maamouri
Affiliation:
Department of Biology, Faculty of Science, Tunis, Tunisia
*

Abstract

Cercaria lata (Digenea, Faustulidae), discovered by Lespés (1857) in Tapes decussata (L.) in the basin of Arcachon, was found for the first time, from the eastern Mediterranean, in the same lamellibranch from Tunisia (Bizerte and Tunis lagoons and Gulf of Gabes). These cercariae develop in daughter sporocysts, which develop in mother sporocysts in the gonads. Daughter sporocysts are observed in the gonads and sometimes in the digestive gland. A redescription and the behaviour of the naturally emerging cercariae and spatio-temporal distribution of the sporocysts are reported. A comparative study using multivariate analyses associated with morphology, biology and seasonality confirm the distinctness of Cercaria lata and the cercaria of Cercaria pectinata from Donax trunculus.

Type
Research Papers
Copyright
Copyright © Cambridge University Press 2009

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