''Caecidotea attenuata'' is a species of freshwater

isopod Isopoda is an Order (biology), order of crustaceans. Members of this group are called isopods and include both Aquatic animal, aquatic species and Terrestrial animal, terrestrial species such as woodlice. All have rigid, segmented exoskeletons ...

in the family

Asellidae The Asellidae are a family (biology), family of Isopoda, isopod crustaceans, one of the largest families of fresh water, freshwater isopods, living in both epigean and hypogean habitats in North America and Europe. Genera The family includes 19 ...

. It is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

Eastern United States The Eastern United States, often abbreviated as simply the East, is a macroregion of the United States located to the east of the Mississippi River. It includes 17–26 states and Washington, D.C., the national capital. As of 2011, the Eastern ...

and

Eastern Canada Eastern Canada (, also the Eastern provinces, Canadian East or the East) is generally considered to be the region of Canada south of Hudson Bay/ Hudson Strait and east of Manitoba, consisting of the following provinces (from east to west): Newf ...

References

Asellota Freshwater crustaceans Species described in 1900 {{isopod-stub