Tryonia aequicostata (Smooth-ribbed Hydrobe)
Tryonia allendae
Tryonia angosturae
Tryonia angulata (Sportingoods Tryonia)
Tryonia carinifer
Tryonia cheatumi (Phantom Tryonia)
Tryonia chuviscarae
Tryonia circumstriata (Gonzales Springsnail)
Tryonia clathrata (grated tryonia)
Tryonia contrerasi
Tryonia diaboli (Devil Tryonia) (Endangered)
Tryonia dugesiana
Tryonia elata (Point of Rocks Tryonia)
Tryonia ellipsostoma
Tryonia ericae (Minute Tryonia)
Tryonia exiguus
Tryonia gilae (Gila Tryonia)
Tryonia globosa
Tryonia hershleri
Tryonia hertleini
Tryonia hibbardi
Tryonia imitator (mimic tryonia)
Tryonia infernalis
Tryonia julimesensis
Tryonia margae (Grapevine Springs elongate springsnail)
Tryonia mariae
Tryonia metcalfi
Tryonia minckleyi
Tryonia minuscula
Tryonia molinae
Tryonia monitorae (Monitor Tryonia)
Tryonia nuttalli
Tryonia oasiensis
Tryonia ornata
Tryonia ovata
Tryonia peregrina
Tryonia pilsbryi
Tryonia porrecta
Tryonia pseudocircumstriata
Tryonia quitobaquitae (Quintobaquito Tryonia)
Tryonia rowlandsi (Grapevine Springs Squat Tryonia)
Tryonia russelli
Tryonia salina (Cottonball Marsh Tryonia)
Tryonia santarosae
Tryonia seemani
Tryonia semituberculata
Tryonia shikueii
Tryonia stewartiana
Tryonia stokesi
Tryonia taylori
Tryonia variegata (Amargosa Tryonia)
Tryonia vivasi
Tryonia zaragozae