A molecular perspective on the phylogenetic relationships of the barbeled minnows, historically assigned to the genus Hybopsis (Cyprinidae: Cypriniformes).
Allozyme products of 32 gene loci were compared for the North American cyprinid fishes Campostoma oligolepis, Cyprinella galactura, Cyprinella monacha, Erimystax cahni, E. dissimilis, E. insignis, E. x-punctatus, Hybopsis amblops, H. labrosa, H. rubriforns, H. zanema, Macrhybopsis aestivalis, M. gelida, M. meeki, Nocomis biguttatus, Phenacobius uranops, Platygobio gracilis, and P. storeriana. Triose-phosphate isomerase was found to be duplicated in all species examined. Parsimony analysis revealed that Hybopsis sensu lato did not form a monophyletic group. Cyprinella monacha was found to be the sister species to members of the genus Cyprinella and was excluded from the genus Erimystax. A clade of four species of Erimystax was identified although relationships among the four species could not be resolved. Phenacobius was identified as the sister group to Erimystax. The genus Macrhybopsis was expanded to include M. aestivalis. Macrhybopsis gelida was identified as the sister to M. meeki and M. aestivalis as the sister to the former two species. The genus Platygobio was expanded to include P. storeriana. Hybopsis labrosa and H. zanema were found to be more closely related to members of the genus Hybopsis sensu stricto than to members of Cyprinella.
Dimmick
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Southern Illinois University, Department of Zoology, Carbondale 62901.
D000818:Animals; D003530:Cyprinidae / Q000145:classification* / Q000235:genetics*; D005838:Genotype; D007527:Isoenzymes / Q000032:analysis; D010802:Phylogeny; D011110:Polymorphism, Genetic
D007527:Isoenzymes