Journal
JOURNAL OF EUKARYOTIC MICROBIOLOGY
Volume 66, Issue 1, Pages 140-146Publisher
WILEY
DOI: 10.1111/jeu.12638
Keywords
Collinia; Paracollinia; phylogeny
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Funding
- Natural Sciences and Engineering Research Council Discovery Grant
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The apostome family Colliniidae includes species that are adapted to the hemocoel/blood of various invertebrates, particularly crustaceans. To explore the phylogeny of these sanguicolous apostomes, Metacollinia luciensis was collected in August 2015 at Roscoff from the amphipod host, Orchestia gammarellus. Ciliates were Protargol stained and DNA was extracted. The small subunit rRNA (SSUrRNA) and cytochrome c oxidase subunit I (cox1) genes were amplified. Molecular phylogenetic analyses of the SSUrRNA genes unambiguously grouped M. luciensis with other apostomes with robust bootstrap support, but separated it distinctly from the pseudocolliniid clade. While there are only cox1 sequences for a subset of these apostomes, M. luciensis was also distant from the pseudocolliniids and separated from them by species of the exuviotrophic apostome Hyalophysa. These results confirm the distinctness of the families Colliniidae and Pseudocolliniidae.
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