Pyrgulopsis turbatrix Hershler 1998

Shell (Fig. 9A–D) ovate to narrow conic, rarely broadly conic, whorls 4.25–5.25. Teleoconch whorls strongly convex, shouldered. Aperture ovate, parietal lip complete, usually slightly disjunct, last 0.25 whorl sometimes loosened behind body whorl, umbilicus narrow. Outer lip thin, prosocline. Operculum (Fig. 9E–F) as for genus; edges of last 0.5 whorl frilled on outer side; muscle attachment margins slightly thickened on inner side. Radula (Fig. 9G–I) as for genus; dorsal edge of central teeth moderately to highly concave, lateral cusps three–seven, basal cusps one–two. Lateral teeth having two–six cusps on inner sides and three–six cusps on outer sides. Inner marginal teeth with 14–31 cusps, outer marginal teeth with 15–33 cusps. Radula data are from USNM 857968, USNM 860450, USNM 860699, USNM 883373. Penis (Fig. 4I–L) medium-sized; filament long, narrow, tapering, oblique; lobe medium-sized, tapering, slightly oblique; ventral surface of lobe having a small (terminal) gland (199/200 specimens) and rarely one or two additional glandular dots (3 specimens), dorsal surface sometimes having a small (penial) gland at base of filament (24/200 specimens) and rarely having an additional glandular dot (one specimen). Penial data are from USNM 854967, USNM 857969, USNM 860450, USNM 860699, USNM 883373, USNM 883981, USNM 1002785.

Spring Mountains region (Frenchman Flat; Indian Springs, Las Vegas, Pahrump Valleys [Pyrgulopsis turbatrix]), San Bernardino Mountains (Mojave, Southern California Coastal drainages [M19, M20, M21]), central Death Valley region (Amargosa River drainage, Panamint and Saline Valleys [M9-M22, M24, M27, M28]). The populations from the latter two areas were previously assigned to Pyrgulopsis micrococcus.