Freshwater Species
(Oregon to Southeast Alaska)
Click on photo to enlarge. Scale line in photo equals 1cm unless otherwise specified.
Citation: Pacific Northwest Shell Club, www.PNWSC.org
Anodontinae
Anodonta kennerlyi Lea, 1860
Western Floater
Sphaerium c. simile
(Say, 1816)
Grooved Fingernailclam
Unionidae
Margaritifera falcata (Gould, 1850)
Western Pearlshell
Gonoidea angulata
(Lea, 1838)
Western Ridged Mussel
Viviparidae
Bellamya chinensis (Gray, 1834)
Chinese Mysterysnail
An introduced species
(previous name - Cipangopaludina chinensis)
Corbiculidae
Corbicula fluminea
(Müller, 1774)
Asian Clam
An invasive species
Pisidium casertanum Poli, 1791
Ubiquitous Peaclam
Lymnaeidae
Radix auricularia (Linnaeus, 1758)
Big-Eared Radix
An introduced species
Physidae
Physella gyrina (Say, 1821)
Tadpole Physa
Planorbella subcrenata (Carpenter, 1857)
Rough Ramshorn
Ancylidae
Ferrissia californica (Rowell, 1863)
Fragile Ancylid
previous name - Ferrissia fragilis (Tryon, 1863)
Planorbidae
Menetus opercularis (Gould, 1847)Button Sprite (synonym - Menetus cooperi)
This page last revised: 5-25-2019
Semisulcospiridae
Juga silicula (Gould, 1847)Glass Juga
Hydrobiidae
Pristinicola hemphilli(Pilsbry 1890)Pristine Pyrg
Amnicolidae
Amnicola limnosa (Say, 1817)found in lakes in WA,
common in streams in the eastern U.S.
Sphaeriidae
Musculium raymondi(Cooper, 1890)Western Lake Fingernailclam
Stagnicola elodes
(Say, 1822)
Marsh Pondsnail