FIGURE 20. A–F in Procambarus (Girardiella) holifieldi, a new species of crayfish (Decapoda: Cambaridae) from Alabama with a revision of the Hagenianus Group in the subgenus Girardiella

FIGURE 20. A–F respectively, annulus ventralis for Procambarus barbiger, Procambarus cometes, Procambarus hagenianus hagenianus, Procambarus holifieldi, Procambarus pogum and Procambarus hagenianus vesticeps. No female available for P. connus. Figures C, E and F are mirror images of the original structure to make for easier comparison.