FIGURE 4. P in Two new, possibly threatened species of Pyrgulopsis (Gastropoda: Hydrobiidae) from southwestern California

FIGURE 4. P. castaicensis sp. nov., USNM 1097788. A. Portion of radula ribbon. Scale = 10 µm. B. Central radular teeth. Scale = 2 µm. C. Lateral and inner marginal teeth. Scale = 10 µm. D–E. Inner marginal teeth. Scales = 10 µm. F. Outer marginal teeth. Scale = 10 µm. Wg = wing.