(Percidae: Etheostoma), with Descriptions of Five New Species

Layman & Mayden Morphological Diversity and Phylogenetics of the Darter subgenus Doration (Percidae: Etheostoma) 19Figure 9. Etheostoma akatulo Layman and Mayden, 2009. Collins River between mouths of Scott and Hillis creeks, 1.6air km SE Irving College, Warren County, Tennessee, 11 April 1992. UAIC 10382.02; holotype, male, 45.5 mm SL.Drawing by Joseph R. Tomelleri (americanfishes.com). Copyrighted by Joseph R. Tomelleri. Used with permission.Variation.—The disjunct Powell and Clinch Riverpopulations vary mainly in the proportion of individualspossessing a frenum and counts of dorsal fin soft rays.Thirty-seven percent of specimens from Powell Riverhave a usually narrow frenum, while 67% of those fromClinch River have a usually narrow or moderate frenum.Mean soft dorsal ray counts are 11.1 in Powell River and11.5 in Clinch River.Distribution.—Etheostoma meadiae occurs only in thePowell and Clinch River systems of the Tennessee Riverdrainage upstream of Norris Reservoir in Tennesseeand Virginia (Figs. 5 and 7). Populations in the two riversystems are isolated by Norris Reservoir, with E. jessiaeoccurring in intervening tributaries of Norris Reservoir(Fig. 7). The two species are distributed parapatrically.Etheostoma akatulo Layman and MaydenBluemask DarterFigs. 3, 9Etheostoma akatulo was diagnosed and described byLayman and Mayden (2009). It is endemic to the upperCaney Fork River system of the Cumberland River drainage,Tennessee. Meristic counts for 203 total specimensare summarized in Tables 1 through 10. This rare speciespresently occurs in only four isolated tributaries of GreatFalls Reservoir in the eastern Highland Rim physiographicprovince, including Collins River, Rocky River, CaneCreek, and upper Caney Fork River (Fig. 5); it formerlyoccurred in the Calfkiller River.