THE XERCES SOCIETY FOR INVERTEBRATE CONSERVATION Aquatic Invertebrates in Pacific Northwest Freshwater Wetlands |
Identify taxa |
| Pleuroceridae The genus Juga is common and often abundant; usually reddish-brown with well-developed cone-shaped shell that may have ridges; tiny to quite large. |
     |
||
| Hydrobiidae shell globose (almost spherical) or conical; generally, shell either < 6 mm or (if slightly larger) globose in shape |
     |
||
| Valvatidae coil of the shell is mostly or completely flattened; opening is usually circular |
|||
| Thiaridae (introduced) similar to Pleuroceridae; shell is usually long, fairly thin cone, may have grainy texture; introduced into southeast OR, ID, southwest MT, and the Southwest | |||
© 2007 Xerces Society
Contact info@xerces.org