15 research outputs found
Influence of Introgression and Geological Processes on Phylogenetic Relationships of Western North American Mountain Suckers (Pantosteus, Catostomidae)
Intense geological activity caused major topographic changes in Western North America over the past 15 million years. Major rivers here are composites of different ancient rivers, resulting in isolation and mixing episodes between river basins over time. This history influenced the diversification of most of the aquatic fauna. The genus Pantosteus is one of several clades centered in this tectonically active region. The eight recognized Pantosteus species are widespread and common across southwestern Canada, western USA and into northern Mexico. They are typically found in medium gradient, middle-elevation reaches of rivers over rocky substrates. This study (1) compares molecular data with morphological and paleontological data for proposed species of Pantosteus, (2) tests hypotheses of their monophyly, (3) uses these data for phylogenetic inferences of sister-group relationships, and (4) estimates timing of divergence events of identified lineages. Using 8055 base pairs from mitochondrial DNA protein coding genes, Pantosteus and Catostomus are reciprocally monophyletic, in contrast with morphological data. The only exception to a monophyleticPantosteus is P. columbianus whose mtDNA is closely aligned with C. tahoensis because of introgression. Within Pantosteus, several species have deep genetic divergences among allopatric sister lineages, several of which are diagnosed and elevated to species, bringing the total diversity in the group to 11 species. Conflicting molecular and morphological data may be resolved when patterns of divergence are shown to be correlated with sympatry and evidence of introgression
Data from: Influence of introgression and geological processes on phylogenetic relationships of western North American mountain suckers (Pantosteus, Catostomidae)
Intense geological activity caused major topographic changes in Western North America over the past 15 million years. Major rivers here are composites of different ancient rivers, resulting in isolation and mixing episodes between river basins over time. This history influenced the diversification of most of the aquatic fauna. The genus Pantosteus is one of several clades centered in this tectonically active region. The eight recognized Pantosteus species are widespread and common across southwestern Canada, western USA and into northern Mexico. They are typically found in medium gradient, middle-elevation reaches of rivers over rocky substrates. This study (1) compares molecular data with morphological and paleontological data for proposed species of Pantosteus, (2) tests hypotheses of their monophyly, (3) uses these data for phylogenetic inferences of sister-group relationships, and (4) estimates timing of divergence events of identified lineages. Using 8055 base pairs from mitochondrial DNA protein coding genes, Pantosteus and Catostomus are reciprocally monophyletic, in contrast with morphological data. The only exception to a monophyletic Pantosteus is P. columbianus whose mtDNA is closely aligned with C. tahoensis because of introgression. Within Pantosteus, several species have deep genetic divergences among allopatric sister lineages, several of which are diagnosed and elevated to species, bringing the total diversity in the group to 11 species. Conflicting molecular and morphological data may be resolved when patterns of divergence are shown to be correlated with sympatry and evidence of introgression
Data from: Influence of introgression and geological processes on phylogenetic relationships of western North American mountain suckers (Pantosteus, Catostomidae)
Intense geological activity caused major topographic changes in Western North America over the past 15 million years. Major rivers here are composites of different ancient rivers, resulting in isolation and mixing episodes between river basins over time. This history influenced the diversification of most of the aquatic fauna. The genus Pantosteus is one of several clades centered in this tectonically active region. The eight recognized Pantosteus species are widespread and common across southwestern Canada, western USA and into northern Mexico. They are typically found in medium gradient, middle-elevation reaches of rivers over rocky substrates. This study (1) compares molecular data with morphological and paleontological data for proposed species of Pantosteus, (2) tests hypotheses of their monophyly, (3) uses these data for phylogenetic inferences of sister-group relationships, and (4) estimates timing of divergence events of identified lineages. Using 8055 base pairs from mitochondrial DNA protein coding genes, Pantosteus and Catostomus are reciprocally monophyletic, in contrast with morphological data. The only exception to a monophyletic Pantosteus is P. columbianus whose mtDNA is closely aligned with C. tahoensis because of introgression. Within Pantosteus, several species have deep genetic divergences among allopatric sister lineages, several of which are diagnosed and elevated to species, bringing the total diversity in the group to 11 species. Conflicting molecular and morphological data may be resolved when patterns of divergence are shown to be correlated with sympatry and evidence of introgression
MtDNA sequence nexus file for Pantosteus and outgroups
Information on partitions within the data file are in the readme file
Morphological data in nexus format
Analysis was conducted with a heuristic Maximum Parsimony search for 1000 replicates which produced 63 trees which we presented the strict consensus of
Bayesian molecular clock estimates for <i>Pantosteus</i> based on analysis of mitochondrial DNA.
<p>Horizontal bars represent the 95% highest posterior density ranges. Locality details are provided in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0090061#pone-0090061-t001" target="_blank">Table 1</a>, OTU order and labels match those in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0090061#pone-0090061-g003" target="_blank">Fig. 3</a>.</p
Proposed changes to the taxonomy of <i>Pantosteus</i> species.
<p>Proposed changes to the taxonomy of <i>Pantosteus</i> species.</p
Morphology-based phylogenetic tree based on PAUP analysis of 87 characters of <i>Pantosteus</i> and other catostomin species from the genera <i>Xyrauchen</i>, <i>Deltistes</i>, <i>Chasmistes</i>, and <i>Castostomus</i>.
<p>Arrows indicate introgression of mtDNA and morphological traits (modified from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0090061#pone.0090061-Smith3" target="_blank">[20]</a>). Topology is based on the strict consensus of 63 equally shortest maximum parsimony trees (length = 252, CI = 0.53, RI = 0.83). Bootstrap values of >80 and above shown at nodes (from 1000 replicates).</p
Locality data for all <i>Pantosteus</i> samples and outgroups.
<p>Locality data for all <i>Pantosteus</i> samples and outgroups.</p