The 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 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.
Logan
Flora J
FJ
Institute of Parasitology, Academy of Sciences of the Czech Republic and Faculty of Biological Sciences, University of South Bohemia, Branisovská 31, 370 05 Ceské Budejovice, Czech Republic.
Horák
A
A
Stefka
J
J
Aydogdu
A
A
Scholz
T
T
D000818:Animals; D002589:Cestoda / Q000145:classification* / Q000235:genetics; D002590:Cestode Infections / Q000469:parasitology / Q000662:veterinary*; D021903:DNA, Ribosomal Spacer / Q000032:analysis / Q000235:genetics*; D004170:Diphyllobothrium / Q000145:classification / Q000235:genetics; D005393:Fish Diseases / Q000469:parasitology*; D005399:Fishes / Q000469:parasitology; D008969:Molecular Sequence Data; D010802:Phylogeny; D017422:Sequence Analysis, DNA
D021903:DNA, Ribosomal Spacer