title: Phylogeny of diplozoids in five genera of the subfamily Diplozoinae Palombi, 1949 as inferred from ITS-2 rDNA sequences.
abstract: The phylogenetic relationship of 5 genera, i.e. Diplozoon Nordmann, 1832, Paradiplozoon Achmerov, 1974, Inustiatus Khotenovsky, 1978, Sindiplozoon Khotenovsky, 1981, and Eudiplozoon Khotenovsky, 1985 in the subfamily Diplozoinae Palombi, 1949 (Monogenea, Polyopisthocotylea) was inferred from rDNA ITS-2 region using neighbour-joining (NJ), maximum likelihood (ML) and Bayesian methods. The phylogenetic trees produced by using NJ, ML and Bayesian methods exhibit essentially the same topology. Surprisingly, freshwater species of Paradiplozoon from Europe clustered together with species of Diplozoon, but separated from Chinese Paradiplozoon species. The results of molecular phylogeny and lower level of divergence (4.1-15.7%) in ITS-2 rDNA among Paradiplozoon from Europe and Diplozoon and, on the other hand, high level of divergence (45.3-53.7%) among Paradiplozoon species from Europe and China might indicate the non-monophyletic origin of the genus Paradiplozoon. Also, the generic status of European Paradiplozoon needs to be revised. The species of Paradiplozoon in China is a basal group in Diplozoinae as revealed by NJ and Bayesian methods, and Sindiplozoon appears to be closely related to European Paradiplozoon and Diplozoon with their relationship to Eudiplozoon and Inustiatus being unresolved.
authors.affiliation: State Key Laboratory of Freshwater Ecology and Biotechnology, and Laboratory of Fish Diseases, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province, 430072, China.
authors.forename: Q
authors.initials: Q
authors.lastname: Gao
authors.forename: M
authors.initials: M
authors.lastname: X Chen
authors.forename: W J
authors.initials: WJ
authors.lastname: Yao
authors.forename: Y
authors.initials: Y
authors.lastname: Gao
authors.forename: Y
authors.initials: Y
authors.lastname: Song
authors.forename: G T
authors.initials: GT
authors.lastname: Wang
authors.forename: M X
authors.initials: MX
authors.lastname: Wang
authors.forename: P
authors.initials: P
authors.lastname: Nie
mesh_terms: D000818:Animals; D021903:DNA, Ribosomal Spacer / Q000235:genetics*; D005399:Fishes / Q000469:parasitology; D014644:Genetic Variation; D010802:Phylogeny; D010986:Platyhelminths / Q000145:classification* / Q000235:genetics*
chemical_list: D021903:DNA, Ribosomal Spacer