Taxonomy of the Sylvilagus brasiliensis complex in Central and South America (Lagomorpha: Leporidae)

A taxonomic framework for South American cottontail rabbits (Lagomorpha: Leporidae: Sylvilagus) was recently published by Diersing and Wilson (2017). Although we agree with some of its taxonomic conclusions (e.g., species status for S. apollinaris and S. fulvescens), we disagree with others. We provide herein evidence supporting S. andinus as a valid species based on morphological characters and novel molecular data. We also provide details of the morphological characters of S. apollinaris and S. fulvescens that support separating these from S. brasiliensis. We adduce data suggestive to the effect that - absent any type material - S. defilippi is at best a nomen dubium. Finally, we provide evidence in support of recognizing additional Neotropical species of Sylvilagus.