title: Phylogeny of finescale shiners of the genus Lythrurus (Cypriniformes: Cyprinidae) inferred from four mitochondrial genes.
abstract: We infer the phylogenetic relationships of finescale shiners of the genus Lythrurus, a group of 11 species of freshwater minnows widely distributed in eastern North America, using DNA sequences from the ND2 (1047 bp), ATPase8 and 6 (823 bp), and ND3 (421 bp) mitochondrial protein-coding genes. The topologies resulting from maximum parsimony, Bayesian, and maximum likelihood tree building methods are broadly congruent, with two distinct clades within the genus: the L. umbratilis clade (L. umbratilis + L. lirus + (L. fasciolaris + (L. ardens, L. matutinus))) and the L. bellus clade (L. fumeus + L. snelsoni + (L. roseipinnis + (L. atrapiculus + (L. bellus, L. algenotus)))). Support is weak at the base of several clades, but strongly supported nodes differ significantly from prior investigations. In particular, our results confirm and extend earlier studies recovering two clades within Lythrurus corresponding to groups with largely "northern" and "southern" geographic distributions. Several species in this genus are listed in the United States as threatened or of special concern due to habitat degradation or limited geographic ranges. In this study, populations assigned to L. roseipinnis show significant genetic divergence suggesting that there is greater genetic diversity within this species than its current taxonomy reflects. A full accounting of the biodiversity of the genus awaits further study.
authors.affiliation: Department of Ecology and Evolutionary Biology, Natural History Museum and Biodiversity Research Center, The University of Kansas, Lawrence, 1345 Jayhawk Boulevard, KS 66045-7561, USA. pramuk@byu.edu
authors.forename: Jennifer B
authors.initials: JB
authors.lastname: Pramuk
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Grose
authors.forename: Anna L
authors.initials: AL
authors.lastname: Clarke
authors.forename: Eli
authors.initials: E
authors.lastname: Greenbaum
authors.forename: Elisa
authors.initials: E
authors.lastname: Bonaccorso
authors.forename: Juan Manuel
authors.initials: JM
authors.lastname: Guayasamin
authors.forename: Allan H
authors.initials: AH
authors.lastname: Smith-Pardo
authors.forename: Brett W
authors.initials: BW
authors.lastname: Benz
authors.forename: Bethany R
authors.initials: BR
authors.lastname: Harris
authors.forename: Eric
authors.initials: E
authors.lastname: Siegfreid
authors.forename: Yana R
authors.initials: YR
authors.lastname: Reid
authors.forename: Nancy
authors.initials: N
authors.lastname: Holcroft-Benson
authors.forename: Edward O
authors.initials: EO
authors.lastname: Wiley
mesh_terms: D000818:Animals; D003530:Cyprinidae / Q000145:classification / Q000235:genetics*; D004272:DNA, Mitochondrial / Q000737:chemistry / Q000235:genetics; D019143:Evolution, Molecular; D050259:Genes, Mitochondrial / Q000235:genetics*; D014644:Genetic Variation; D008969:Molecular Sequence Data; D009656:North America; D010802:Phylogeny; D017422:Sequence Analysis, DNA
chemical_list: D004272:DNA, Mitochondrial