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Molecular phylogenetics of central Canadian Physidae (Pulmonata: Basommatophora)
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The phylogenetic relationships of four nominal south-central Canadian freshwater physids ( Physa (sensu lato) skinneri Taylor, 1954, Physa integra (Haldeman, 1841), Physa gyrina (Say, 1821), and the endemic Physa winnipegensis Pip, 2004) were studied by analyses of combined partial sequences coding for mitochondrial 16S and cytochrome c oxidase (COI) genes. Maximum parsimony and neighbour joining analyses, as well as comparisons with published sequences, supported four major clades of physids, of which three are represented in central Canada. Physa skinneri and P. integra were placed within the Physa fontinalis (L., 1758) and Physa acuta Draparnaud, 1805 clades, respectively. Physa winnipegensis formed a distinct branch within the P. acuta group. An additional, previously unreported and unclassified, morph within the P. acuta group was identified from Lake Winnipeg.
Title: Molecular phylogenetics of central Canadian Physidae (Pulmonata: Basommatophora)
Description:
The phylogenetic relationships of four nominal south-central Canadian freshwater physids ( Physa (sensu lato) skinneri Taylor, 1954, Physa integra (Haldeman, 1841), Physa gyrina (Say, 1821), and the endemic Physa winnipegensis Pip, 2004) were studied by analyses of combined partial sequences coding for mitochondrial 16S and cytochrome c oxidase (COI) genes.
Maximum parsimony and neighbour joining analyses, as well as comparisons with published sequences, supported four major clades of physids, of which three are represented in central Canada.
Physa skinneri and P.
integra were placed within the Physa fontinalis (L.
, 1758) and Physa acuta Draparnaud, 1805 clades, respectively.
Physa winnipegensis formed a distinct branch within the P.
acuta group.
An additional, previously unreported and unclassified, morph within the P.
acuta group was identified from Lake Winnipeg.
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