Molecular data reveal a tropical freshwater origin of Naidinae (Annelida, Clitellata, Naididae)
Number of Authors: 4
2017 (English)In: Molecular Phylogenetics and Evolution, ISSN 1055-7903, E-ISSN 1095-9513, Vol. 115, p. 115-127Article in journal (Refereed) Published
Abstract [en]
The phylogenetic relationships within Naidinae (Annelida, Clitellata, Naididae) were investigated, using six molecular markers, both mitochondrial (12S rDNA, 16S rDNA, the COI gene) and nuclear (18S rDNA, 28S rDNA, the ITS region). Thirty-seven nominal species, representing 16 of the 22 genera recognized in the subfamily, were included, and the Nais conmmmunis/variabilis species complex was represented by six different morphotypes. Ten other species of Naididae were selected as outgroups. The data were analysed by Bayesian inference and Maximum Likelihood. The phylogeny corroborates monophyly of the Naidinae, and the separate status of the genus Pristina (Pristininae) and the Opistocystinae. Relationships within Naidinae are largely well supported, but in some parts unexpected: (1) A Glade containing the largely tropical genera Dero and Branchiodrilus is sister to the rest of the subfamily, and together with a third tropical genus, Allonais, they form a basal paraphyly. All these genera show morphological adaptations to environmental hypoxia, leading to the conclusion that Naidinae originated in tropical freshwaters. (2) The genera Dero, Nais and Piguetiella are paraphyletic. (3) At least Branchiodrilus, Paranais, Chaetogaster, Nais, Stylaria appear to contain cryptic species. Morphological characters, especially those associated with chaetae, are to a great extent homoplastic within Naidinae, which certainly has contributed to the overall taxonomic confusion of this subfamily.
Place, publisher, year, edition, pages
2017. Vol. 115, p. 115-127
Keyword [en]
Naidinae, Naididae, Molecular systematics, 12S rDNA, 16S rDNA, 18S rDNA, 28S rDNA, COI, ITS, Character evolution
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:su:diva-146944DOI: 10.1016/j.ympev.2017.07.016ISI: 000409156200013PubMedID: 28743643OAI: oai:DiVA.org:su-146944DiVA, id: diva2:1142520
2017-09-192017-09-192017-09-19Bibliographically approved