FIG. 2 in Sexual Isolation between Two Sympatric Desmognathus in the Gulf Coastal Plain

FIG. 2. Joint isolation coefficients from published studies of crosses between species of plethodontids. Joint isolation (JI) coefficients for insemination from crosses between allopatric (black) and sympatric (gray) taxa are represented as a histogram. Results from this study (JI ¼ 1.21) between sympatric D. aff. auriculatus and D. conanti (SL) are indicated with a patterned fill. Previously published studies represented in this figure include Verrell (1989b, 1990a, 1990b), Verrell and Tilley (1992), Uzendoski and Verrell (1993), Arnold et al. (1996), Herring and Verrell (1996), Kozak (2003), and Mabry and Verrell (2004).