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First description of monogenean parasites in Lake Tanganyika: the cichlid Simochromis diagramma (Teleostei, Cichlidae) harbours a high diversity of Gyrodactylus species (Platyhelminthes, Monogenea)

Published online by Cambridge University Press:  15 October 2010

MAARTEN P. M. VANHOVE ,
JOS SNOEKS ,
FILIP A. M. VOLCKAERT  and
TINE HUYSE
MAARTEN P. M. VANHOVE*
Affiliation:
Laboratory of Animal Diversity and Systematics, Katholieke Universiteit Leuven, Deberiotstraat 32, B-3000 Leuven, Belgium Department of African Zoology, Royal Museum for Central Africa, Leuvensesteenweg 13, B-3080 Tervuren, Belgium
JOS SNOEKS
Affiliation:
Laboratory of Animal Diversity and Systematics, Katholieke Universiteit Leuven, Deberiotstraat 32, B-3000 Leuven, Belgium Department of African Zoology, Royal Museum for Central Africa, Leuvensesteenweg 13, B-3080 Tervuren, Belgium
FILIP A. M. VOLCKAERT
Affiliation:
Laboratory of Animal Diversity and Systematics, Katholieke Universiteit Leuven, Deberiotstraat 32, B-3000 Leuven, Belgium
TINE HUYSE
Affiliation:
Laboratory of Animal Diversity and Systematics, Katholieke Universiteit Leuven, Deberiotstraat 32, B-3000 Leuven, Belgium
*
*Corresponding author: Laboratory of Animal Diversity and Systematics, Katholieke Universiteit Leuven, Charles Deberiotstraat 32, B-3000 Leuven, Belgium. Tel: +32 16 32 39 18. Fax: +32 16 32 45 75. E-mail: maarten.vanhove@bio.kuleuven.be
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Summary

Lake Tanganyika harbours the most diverse endemic cichlid fish assemblage of Africa, but its monogenean fish parasites have not been investigated. Here we report, for the first time, on the Gyrodactylus parasites in this hotspot of fish biodiversity. Haptor morphometrics and nuclear ribosomal DNA sequences revealed 3 new species on Zambian Simochromis diagramma: Gyrodactylus sturmbaueri n. sp., G. thysi n. sp. and G. zimbae n. sp. Their distinct morphology and strong genetic differentiation suggest that they belong to distant lineages within the genus Gyrodactylus, and phylogenetic reconstructions suggest affinities with other genera of gyrodactylids. Additional U-shaped haptoral plates in G. thysi n. sp. and a second large spine-like structure in the male copulatory organ of G. zimbae seem to represent new features for the genus. Such large diversity on a single host species can probably be explained by host-switching events during the course of evolution, in agreement with the generally accepted concept that ecological transfer is an important aspect of gyrodactylid speciation. Additional parasitological surveys on other host species, covering a broader phylogenetic and geographical range, should clarify the evolutionary history of Gyrodactylidae on cichlids in the African Great Lake and other parts of Africa.

Keywords

AfricacichlidsGyrodactylidaeLake TanganyikaMonogeneaSimochromis diagrammaspeciationspecies descriptionspecies flockTropheini
Type
Research Article
Information
Parasitology , Volume 138 , Issue 3 , March 2011 , pp. 364 - 380
Copyright
Copyright © Cambridge University Press 2010

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