Phylogenetic relationships within the aquatic snail genus Tryonia: implications for biogeography of the North American Southwest.

@article{Hershler1999PhylogeneticRW,
  title={Phylogenetic relationships within the aquatic snail genus Tryonia: implications for biogeography of the North American Southwest.},
  author={Robert Hershler and H. P. Liu and Margaret Mulvey},
  journal={Molecular phylogenetics and evolution},
  year={1999},
  volume={13 2},
  pages={
          377-91
        }
}
We examined the phylogenetic relationships among 23 species of the North American aquatic snail genus Tryonia (Hydrobiidae), 10 additional representatives of the subfamily Cochliopinae, and two outgroups. Maximum parsimony analysis of a 601-base-pair sequence from the mitochondrial COI gene did not support monophyly of the genus nor its subgenus Paupertryonia. A clade composed of the type species of Tryonia and 16 congeners was strongly supported by the COI data and congruent with recently… 

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