Mechanisms of speciation and faunal enrichment in Atlantic parrotfishes.

  title={Mechanisms of speciation and faunal enrichment in Atlantic parrotfishes.},
  author={Desiree R. Robertson and Frances Karg and Rodrigo Le{\~a}o de Moura and Benjamin C. Victor and Giacomo Bernardi},
  journal={Molecular phylogenetics and evolution},
  volume={40 3},
Relationships based on mtDNA and nDNA sequences were used to assess effects of two major geographic barriers (the >30 myo Atlantic ocean and the approximately 11 myo Amazon-Orinoco outflow) on speciation among Atlantic parrotfishes (Sparisoma and Nicholsina). Allopatric distributions of sister taxa implicate isolating actions of both barriers in all recent speciation in these fishes, with no clear indications that any speciation resulted from other mechanisms. Molecular clock estimates of the… CONTINUE READING