A Phylogenetic approach to species delimitation in freshwater Gastrotricha from Sweden
2012 (English)In: Hydrobiologia, ISSN 0018-8158, E-ISSN 1573-5117, Vol. 683, no 1, 185-202 p.Article in journal (Refereed) Published
Gastrotricha is a cosmopolitan group of aquatic invertebrates. To date approximately 765 species have been described. This study is the first to deal with species delimitation and cryptic species of freshwater Gastrotricha. Three commonly encountered species, Heterolepidoderma ocellatum, Lepidochaetus zelinkai and Lepidodermella squamata, are investigated for cryptic speciation. Most of the material is based on Swedish specimens but closely related species from other parts of the world are also included. Taxonomic revisions are supported by phylogenies based on 18S rRNA, 28S rRNA and COI mtDNA of freshwater Chaetonotidae from several genera and inferred from Bayesian and maximum likelihood approaches. Heterolepidoderma ocellatum f. sphagnophilum is raised to species level, becoming H. acidophilum n. sp. Moreover, genetic data based on COI indicates high variation between two morphologically very similar groups of Lepidodermella squamata. The extent of cryptic speciation in L. zelinkai appears low. Based on the phylogenetic hypothesis presented in this paper the new species, Lepidodermella intermedia n. sp., from northernSweden is also described. The phylogenetic hypothesis generated show that Chaetonotidae is a non-monophyletic group.
Place, publisher, year, edition, pages
2012. Vol. 683, no 1, 185-202 p.
Chaetonotidae, Freshwater fauna, Phylogeny, Taxonomic revisions, New species
Research subject Systematic Zoology
IdentifiersURN: urn:nbn:se:su:diva-63237DOI: 10.1007/s10750-011-0956-1ISI: 000299925200014OAI: oai:DiVA.org:su-63237DiVA: diva2:447659
ProjectsGastrotricha of Sweden