Phylogeny of finescale shiners of the genus Lythrurus (Cypriniformes: Cyprinidae) inferred from four mitochondrial genes.
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.
Pramuk
Jennifer B
JB
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
Grose
Michael J
MJ
Clarke
Anna L
AL
Greenbaum
Eli
E
Bonaccorso
Elisa
E
Guayasamin
Juan Manuel
JM
Smith-Pardo
Allan H
AH
Benz
Brett W
BW
Harris
Bethany R
BR
Siegfreid
Eric
E
Reid
Yana R
YR
Holcroft-Benson
Nancy
N
Wiley
Edward O
EO
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
D004272:DNA, Mitochondrial