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Interrelationships of Nemertodermatida
Stockholm University, Faculty of Science, Department of Zoology. Swedish Museum of Natural History, Sweden; Biology Centre of the Czech Academy of Sciences, Czech Republic.
Stockholm University, Faculty of Science, Department of Zoology. Swedish Museum of Natural History, Sweden.
Number of Authors: 2
2016 (English)In: Organisms Diversity & Evolution, ISSN 1439-6092, E-ISSN 1618-1077, Vol. 16, no 1, 73-84 p.Article in journal (Refereed) Published
Abstract [en]

Nemertodermatida is a small taxon of microscopic marine worms, which were originally classified within Platyhelminthes. Today they are hypothesized to be either an early bilaterian lineage or the sister group to Ambulacraria within Deuterostomia. These two hypotheses indicate widely diverging evolutionary histories in this largely neglected group. Here, we analyse the phylogeny of Nemertodermatida using nucleotide sequences from the ribosomal LSU and SSU genes and the protein coding Histone 3 gene. All currently known species except Ascoparia neglecta and Ascoparia secunda were included in the study in addition to several yet undescribed species. Ascopariidae and Nemertodermatidae are retrieved as separate clades, although not in all analyses as sister groups. Non-monophyly of Nemertodermatida was rejected by the Approximately Unbiased test. Nemertodermatid nucleotide sequences deposited in Genbank before 2013 were validated against our dataset; some of them are shown to be chimeric implying falsification of prior hypotheses about nemertodermatid phylogeny: other sequences should be assigned new names. We also show that the genus Nemertoderma needs revision.

Place, publisher, year, edition, pages
2016. Vol. 16, no 1, 73-84 p.
Keyword [en]
Nemertodermatida, LSU, SSU, Molecular phylogeny, Cryptic species, Approximately Unbiased test
National Category
Biological Sciences
URN: urn:nbn:se:su:diva-129635DOI: 10.1007/s13127-015-0240-8ISI: 000372294700007OAI: diva2:925016
Available from: 2016-04-29 Created: 2016-04-26 Last updated: 2016-04-29Bibliographically approved

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Meyer-Wachsmuth, IngaJondelius, Ulf
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