title: The systematic position of Opistocystidae (Annelida, Clitellata) revealed by DNA data.
abstract: Opistocystidae Cernosvitov, 1936 is a largely Neotropical oligochaete taxon containing seven species. Its familial status has never been formally challenged, although possible close relationships with Naididae and Phreodrilidae have been noted. Mitochondrial 12S and 16S rDNA, and nuclear 18S rDNA, of a range of aquatic oligochaete taxa, including Trieminentia corderoi (Opistocystidae), were analysed by Bayesian inference. This showed that T. corderoi is a derived lineage within Naididae, closely related to Pristina and its monotypic subfamily Pristininae. Opistocystidae as a whole (with its three genera, Opistocysta, Trieminentia, and Crustipellis) is thus likely to be a group within Naididae.
authors.affiliation: Department of Zoology, University of Gothenburg, Göteborg, Sweden. christer.erseus@zool.gu.se
authors.forename: Christer
authors.initials: C
authors.lastname: Erséus
authors.forename: Ida
authors.initials: I
authors.lastname: Envall
authors.forename: Mercedes
authors.initials: M
authors.lastname: Marchese
authors.forename: Lena
authors.initials: L
authors.lastname: Gustavsson
mesh_terms: D000818:Animals; D002467:Cell Nucleus / Q000235:genetics; D004272:DNA, Mitochondrial / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D019143:Evolution, Molecular; D009835:Oligochaeta / Q000145:classification / Q000235:genetics*; D010802:Phylogeny; D012335:RNA, Ribosomal / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012337:RNA, Ribosomal, 18S / Q000235:genetics; D017422:Sequence Analysis, DNA
chemical_list: D004272:DNA, Mitochondrial; D004275:DNA, Ribosomal; D012335:RNA, Ribosomal; D012336:RNA, Ribosomal, 16S; D012337:RNA, Ribosomal, 18S; C075526:RNA, ribosomal, 12S