Turbellarian taxonomic database

Record # 21341
Author
Title
Journal
Larsson K, Ahmadzadeh A, Jondlius U (2008)
DNA taxonomy of Swedish Catenulida (Platyhelminthes) and a phylogenetic framework for catenulid classification
Organisms Diversity & Evolution 8(5):399-412

Abstract / Notes

"Specimens of Catenulida were collected at 34 localities in Sweden. We used 18S rDNA, 28S rDNA, ITS-5.8S, and
cytochrome oxidase I (COI) nucleotide sequences to infer phylogeny from parsimony jackknifing and Bayesian
analysis. Our dataset contained 74 ingroup terminals and 5111 characters. The results show a basal split
between a clade consisting of the marine Retronectidae+the limnic Catenulidae, and a second clade consisting
of the limnic Stenostomidae. The hypothesis of the marine Retronectidae as the sister group of the limnic
Catenulida is rejected. The recently introduced genus Anokkostenostomum Noreña, Damborenea & Brusa, 2005
results as non-monophyletic, and Suomina Marcus, 1945 as a group inside Catenula Dugès, 1832. Therefore, we
propose to render Anokkostenostomum a new junior synonym of Stenostomum Schmidt, 1848, and Suomina a new
junior synonym of Catenula. Consequently, the new combinations Catenula evelinae (Marcus, 1945), Catenula
sawayai (Marcus, 1945), and Catenula turgida (Zacharias, 1902) are proposed, and 14 species are returned to
their original genus, Stenostomum. The molecular phylogenetic hypothesis is used to identify and discriminate
catenulid species. In our material, we found 12 species of Catenulida new to Sweden, and four species new to
science, all of which are distinguishable by morphological characters."

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