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Speciation of cestoda. Evidence for two sibling species in the complex Bothrimonus nylandicus (Schneider 1902) (Cestoda: Cyathocephalidea)

Published online by Cambridge University Press:  06 April 2009

F. Renaud
Affiliation:
Laboratoire de Parasitologie comparée (CNRS UA 698), USTL Place Eugène Bataillon, 34060 Montpellier Cedex, France
C. Gabrion
Affiliation:
Laboratoire de Parasitologie comparée (CNRS UA 698), USTL Place Eugène Bataillon, 34060 Montpellier Cedex, France

Summary

Using biochemical genetic methods, we have distinguished 2 sibling species in the complex Bothrimonus nylandicus (Schneider, 1902), which infest 2 congeneric species of sole (Solea lascaris and Solea impar) on European coasts (Atlantic and Mediterranean). Neither of the parasite species is specific for either of the sole species, but one of them is present all year round, whereas the other is absent in the autumn and winter and only appears in the spring, subsequently disappearing at the end of the summer. Only S. impar lives in the Mediterranean, and is equally infested by both cestodes, whereas both species occur in the Atlantic and each of them is preferentially infested by 1 species of cestode. The shortness of the adult stage of the parasite in the definitive host and the presence of 2 life-cycles associated with competition between the 2 hosts in the Atlantic could be responsible for the biological differences observed and for maintaining the sibling species in sympatry.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1988

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