A phylogeny of members of the family Taeniidae based on the mitochondrial cox1 and nad1 gene data

The cestode family Taeniidae consists of 2 genera, Taenia and Echinococcus, which both have been the focus of intensive taxonomic and epidemiological studies because of their zoonotic importance. However, a comprehensive molecular phylogeny of this family has yet to be reconstructed. In this study,...

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Bibliographic Details
Published in:Parasitology 2008-10, Vol.135 (12), p.1457-1467
Main Authors: LAVIKAINEN, A., HAUKISALMI, V., LEHTINEN, M. J., HENTTONEN, H., OKSANEN, A., MERI, S.
Format: Article
Language:English
Subjects:
Animals
Cestoda
Cestoda - classification
Cestoda - genetics
Cyclooxygenase 1 - genetics
Cyclooxygenase 1 - metabolism
Demography
Echinococcus
Gene Expression Regulation
Genes, Mitochondrial - genetics
NADH Dehydrogenase - genetics
NADH Dehydrogenase - metabolism
Ovis
Phylogeny
Taenia
Taeniidae
Taxa
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Summary:The cestode family Taeniidae consists of 2 genera, Taenia and Echinococcus, which both have been the focus of intensive taxonomic and epidemiological studies because of their zoonotic importance. However, a comprehensive molecular phylogeny of this family has yet to be reconstructed. In this study, 54 isolates representing 9 Taenia species were characterized using DNA sequences in the mitochondrial cytochrome c oxidase subunit 1 (cox1) and NADH dehydrogenase subunit 1 (nad1) genes. Phylogenetic relationships within the family Taeniidae were inferred by combining cox1 and nad1 sequence data of the present and previous studies. In the phylogenetic analysis, the genus Echinococcus was shown to be monophyletic, but Taenia proved to be paraphyletic due to the position of T. mustelae as a probable sister taxon of Echinococcus. This indicates that T. mustelae should form a genus of its own. Taenia ovis krabbei was placed distant from T. ovis ovis, as a sister taxon of T. multiceps, supporting its recognition as a distinct species, T. krabbei. High intraspecific sequence variation within both T. polyacantha and T. taeniaeformis suggests the existence of cryptic sister species.
ISSN:0031-1820
1469-8161
DOI:10.1017/S003118200800499X