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Molecular Systematics Of The Freshwater Mussel Genus Potamilu (Bivalvia: Unionidae), Kevin J. Roe, Charles Lydeard
Molecular Systematics Of The Freshwater Mussel Genus Potamilu (Bivalvia: Unionidae), Kevin J. Roe, Charles Lydeard
Kevin J. Roe
Few explicit hypotheses for the relationships of unionid mussels exist. The absence of explicit phylogenetic hypotheses is problematic and is in part responsible for the lack of taxonomic stability seen in this group. In this paper we examine the relationships of mussels in the genus Potamilus, based upon the DNA sequences of a 600 base pair portion of the first subunit of the mitochondrial cytochrome c oxidase (COI) gene. We also examine the genetic distinctiveness of populations of the inflated heelsplitter P. inflatus. The molecular phylogeny indicates that Potamilus is paraphyletic with Leptodea fragilis and Lampsilis ornata nested between P. …