DistributionRead full entry
Global Range: (5000-20,000 square km (about 2000-8000 square miles)) Range includes the Devils River and San Felipe and Sycamore creeks (Hubbs et al. 2008). Schonhuth et al. (2008) reported collection of this species from the lower Pecos River at Pandale, Val Verde County, and from San Felipe Spring, in Moore Park, Val Verde County, Texas. Carson et al. (2010) examined genetic variation in Dionda and determined that the population in Independence Creek in the lower Pecos River basin is D. argentosa rather than D. episcopa.