Figure 3 from: Hershler R, Liu H-P, Babbitt C, Kellogg MG, Howard JK (2016) Three new species of western California springsnails previously confused with Pyrgulopsis stearnsiana (Caenogastropoda, Hydrobiidae). ZooKeys 601: 1-19. https://doi.org/10.3897/zookeys.601.9040

Figure 3 - Penes (dorsal, ventral surfaces). A Pyrgulopsis lindae sp. n., USNM 1257409 B Pyrgulopsis ojaiensis sp. n., SBMNH 460496 C Pyrgulopsis torrida sp. n. USNM 1120443 D, E, F Pyrgulopsis stearnsiana USNM 1297168, USNM 1252041, USNM 905251, respectively. Scale bars: 250 µm. Pd penial duct Pf penial filament Pg penial gland Pl penial lobe Tg terminal gland Vg ventral gland.