A paraphyly of the genus Bothriocephalus Rudolphi, 1808 (Cestoda: Pseudophyllidea) inferred from internal transcribed spacer-2 and 18S ribosomal DNA sequences.
Phylogenetic relationships between Bothriocephalus species from freshwater and marine teleosts from different geographical regions were studied using internal transcribed spacer-2 and partial 18S ribosomal DNA. The analyses revealed a paraphyly of Bothriocephalus with respect to the genera Polyonchobothrium, Anantrum, and Clestobothrium. The freshwater species Bothriocephalus claviceps, B. acheilognathi, and Bothriocephalus sp. from Dorosoma petenense formed a well-supported monophyletic cluster, with Polyonchobothrium at its base. In contrast, the type species, B. scorpii, clustered within a distinct lineage formed by a heterogeneous assemblage of marine species, Clestobothrium crassiceps and Anantrum tortum, and the freshwater species B. cf. japonicus. This shows that the current morphology-based classification is unlikely to reflect the phylogenetic relationships within this group and will require a thorough revision.
Faculty of Biological Sciences, University of South Bohemia, and Institute of Parasitology, Academy of Sciences of the Czech Republic, Branisovská 31, 370 05 Ceské Budĕjovice, Czech Republic.
Andrea
A
Skeríková
Václav
V
Hypsa
Tomás
T
Scholz
D000818:Animals; D002589:Cestoda / Q000145:classification / Q000235:genetics*; D002590:Cestode Infections / Q000469:parasitology / Q000662:veterinary; D004275:DNA, Ribosomal / Q000737:chemistry*; D021903:DNA, Ribosomal Spacer / Q000737:chemistry*; D005393:Fish Diseases / Q000469:parasitology; D005399:Fishes; D005618:Fresh Water; D010802:Phylogeny; D012337:RNA, Ribosomal, 18S / Q000235:genetics*; D012623:Seawater; D016415:Sequence Alignment / Q000662:veterinary
D004275:DNA, Ribosomal; D021903:DNA, Ribosomal Spacer; D012337:RNA, Ribosomal, 18S