Reproductive anatomy, F. klamathensis sp. n. A Female glandular oviduct and associated structures (viewed from left side), USNM 1225874 B Bursa copulatrix and seminal receptacle, USNM 1225874 C, D Penis (dorsal surface), USNM 1225874, USNM 1469090. Ag albumen gland Bu bursa copulatrix Cg capsule gland Cov coiled oviduct Dsr seminal receptacle duct Ga genital aperture In inner edge of penis Ou outer edge of penis Pd penial duct Pf penial filament Pw posterior wall of pallial cavity Sr seminal receptacle Vc ventral channel of capsule gland. Scale bars: 1.0 mm (A–C); 500 µm (D).

  Part of: Liu H-P, Hershler R (2019) A new species and range extensions for three other species of pebblesnails (Lithoglyphidae, Fluminicola) from the upper Klamath basin, California–Oregon. ZooKeys 812: 47-67.