FIGURE 3. P in Two new, possibly threatened species of Pyrgulopsis (Gastropoda: Hydrobiidae) from southwestern California

FIGURE 3. P. castaicensis sp. nov. A–C. Shells. Scale = 1.0 mm. A. Holotype, USNM 1120442. B–C. Paratypes, USNM 1132532. D. Shell apex, USNM 1132532. Scale = 100 µm. E. Close-up of protoconch sculpture, USNM 1132532. Scale = 100 µm. F–H. Opercula, USNM 1132532. Scale = 250 µm. F. Outer side, showing frilled whorl. G–H. Inner side, showing variation in thickening of attachment scar margin.