title: Comparative analysis of three species populations of Profundulus (Teleostei: Cyprinodontiformes) using two genetic markers.
abstract: OBJECTIVE
  The fish Family Profundulidae is endemic in south-southeast Mexico, with five known species. The species-level analysis of the genus based on morphological characters is insufficient and complex due to increased phenotypic and intraspecific variation. This variation might be owed to the existence of yet undescribed forms.
  
  
  METHODS
  In the present study, the genetic composition of three species of the State of Chiapas, Mexico, is compared by examining different populations of the species Profundulus candalarius, Profundulus labialis, and Profundulus punctatus.
  
  
  RESULTS
  We identified specimens from 16 localities and sequenced mitochondrial DNA representing partial regions of the cytochrome b and cox1 genes.
  
  
  CONCLUSIONS
  The results suggest an extreme divergence of the populations of P. labialis from El Sabinal.
authors.affiliation: Instituto de Biología, Universidad Nacional Autónoma de México.
authors.forename: Xavier
authors.initials: X
authors.lastname: Valencia-Díaz
authors.forename: Hector
authors.initials: H
authors.lastname: Espinosa-Pérez
mesh_terms: D000818:Animals; D001483:Base Sequence; D016000:Cluster Analysis; D003532:Cyprinodontiformes / Q000235:genetics*; D017931:DNA Primers / Q000235:genetics; D004272:DNA, Mitochondrial / Q000235:genetics*; D019143:Evolution, Molecular; D005819:Genetic Markers / Q000235:genetics*; D014644:Genetic Variation; D008800:Mexico; D008957:Models, Genetic; D008969:Molecular Sequence Data; D010802:Phylogeny; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D013045:Species Specificity
chemical_list: D017931:DNA Primers; D004272:DNA, Mitochondrial; D005819:Genetic Markers