phylogeny of diphyllobothriid tapeworms (Cestoda: Pseudophyllidea) based on ITS-2 rDNA sequences

Phylogenetic analysis of sequences of the ITS-2 rRNA genes of 20 samples of pseudophyllidean cestodes of the family Diphyllobothriidae (Ligula, Digramma, Diphyllobothrium, and Schistocephalus) from different hosts and geographical regions revealed that: (1) the inclusion of ligulids (previously fami...

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Bibliographic Details
Published in:Parasitology research (1987) 2004-09, Vol.94 (1), p.10-15
Main Authors: LOGAN, Flora J, HORAK, A, STEFKA, J, AYDOGDU, A, SCHOLZ, T
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
Cestoda - classification
Cestoda - genetics
Cestode Infections - parasitology
Cestode Infections - veterinary
Diphyllobothrium - classification
Diphyllobothrium - genetics
DNA, Ribosomal Spacer - analysis
DNA, Ribosomal Spacer - genetics
Fish Diseases - parasitology
Fishes - parasitology
Fundamental and applied biological sciences. Psychology
General aspects
General aspects and techniques. Study of several systematic groups. Models
Invertebrates
Molecular Sequence Data
Phylogeny
Sequence Analysis, DNA
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Summary:Phylogenetic analysis of sequences of the ITS-2 rRNA genes of 20 samples of pseudophyllidean cestodes of the family Diphyllobothriidae (Ligula, Digramma, Diphyllobothrium, and Schistocephalus) from different hosts and geographical regions revealed that: (1) the inclusion of ligulids (previously family Ligulidae) to the Diphyllobothriidae is correct; (2) Schistocephalus appears as the most basal taxon of the Diphyllobothriidae, well separated from Ligula and Digramma, thus supporting the validity of Schistocephalinae Dubinina, 1962; (3) Digramma belonged with samples of Ligula, thus suggesting its invalidity as a genus; and (4) isolates of Ligula, presumably belonging to Ligula intestinalis, are paraphyletic, indicating that this species may represent a complex of separate taxa. Our results indicate the necessity for a taxonomic revision of the family Diphyllobothriidae.
ISSN:0932-0113
1432-1955
DOI:10.1007/s00436-004-1164-y