Polyphyly of the Pikeminnows (Teleostei: Cyprinidae) Inferred Using Mitochondrial DNA Sequences

The phylogenetic relationships of the Colorado pikeminnow Ptychocheilus lucius, northern pikeminnow P. oregonensis, Sacramento pikeminnow P. grandis, Umpqua pikeminnow P. umpquae, and hardhead Mylopharodon conocephalus were examined by using molecular data to investigate monophyly of the genus Ptych...

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Bibliographic Details
Published in:Transactions of the American Fisheries Society (1900) 2010-01, Vol.139 (1), p.303-315
Main Authors: Houston, Derek D., Ogden, T. Heath, Whiting, Michael F., Shiozawa, Dennis K.
Format: Article
Language:English
Subjects:
Cyprinidae
Freshwater
Mylopharodon conocephalus
Ptychocheilus
Ptychocheilus lucius
Teleostei
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Summary:The phylogenetic relationships of the Colorado pikeminnow Ptychocheilus lucius, northern pikeminnow P. oregonensis, Sacramento pikeminnow P. grandis, Umpqua pikeminnow P. umpquae, and hardhead Mylopharodon conocephalus were examined by using molecular data to investigate monophyly of the genus Ptychocheilus. Phylogenies generated using DNA sequence data from the cytochrome b and 16S ribosomal DNA genes of the mitochondrial genome reveal that Ptychocheilus is a polyphyletic genus and suggest that the taxonomy of the group is in need of further revision. These data yield insights into the evolution of the pikeminnows and help place the significant evolutionary events in context with the geological history of parts of western North America (e.g., ancient drainage connections that may have allowed for dispersal, followed by speciation once those connections were broken).
ISSN:0002-8487
1548-8659
DOI:10.1577/T09-075.1