Also known as the strange pebblesnail, the species is a critically imperiled freshwater gastropod found only at Page Springs in the Donner und Blitzen River drainage in southeast Oregon. “Saving this ...

Endangered Species Act protection will ensure Arkansas mudalia don’t join that list.” Freshwater gastropods like the Arkansas mudalia are highly sensitive to disruptions in their environments and are ...

The type collection is the most scientifically important of its kind. The non-marine (terrestrial and freshwater) gastropod and bivalve molluscs collections are the most geographically diverse and ...