The geographic distribution of the imperiled Barrens Darter, Etheostoma forbesi, and threats of hybridization with the closely related Fringed Darter, Etheostoma crossopterum.

Meristic data description: Meristic data tables for both Etheostoma forbesi and Etheostoma crossopterum are attached ("E_forbesi_meristic_data.csv" and "E_crossopterum_meristic_data.csv"). Data are presented as one row of data representing each individual. Museum identification numbers for each individual examined are listed in column 1 of each table. The locality information for each museum lot number from column 1 of the meristic data tables can be found in the corresponding locality data files ("E_forbesi_meristic_locality_data.csv", "E_crossopterum_meristic_locality_data.csv"). Genetic data description: Supplementary Materials A and B (files "Supplementary_Material_A.csv" and "Supplementary_Material_B.csv") are tables listing the Genbank accession numbers, tissue and whole-body museum accession numbers, and geographic collection locality information for each DNA sequence used in this study. Alignments of mitochondrial cytb and nuclear S7 sequence data are provided in nexus file format (files: "spottail_cytb_alignment.nex" and "spottail_s7_alignment.nex").