endemic to a single nation
Regularity: Regularly occurring
Type of Residency: Year-round
Global Range: (1000-200,000 square km (about 400-80,000 square miles)) Pacific versant in Idaho and Oregon (Hobbs, 1989).
Pigmented, eyes normal; rostrum narrow with margins converging to distinct acumen and with more than 3 pr lateral marginal spines, acarinate; postorbital ridges with posterior spines or tubercles; dorsal surface of palm with 2 conspicuous longitudinal clusters of setae, width of palm less than length of mesial margin.
Habitat and Ecology
Habitat Type: Freshwater
Comments: It is found in lotic habitats. It is known from streams in unpopulated areas of Idaho and Oregon.
Non-Migrant: No. All populations of this species make significant seasonal migrations.
Locally Migrant: No. No populations of this species make local extended movements (generally less than 200 km) at particular times of the year (e.g., to breeding or wintering grounds, to hibernation sites).
Locally Migrant: No. No populations of this species make annual migrations of over 200 km.
Home range probably does not exceed 50 m.
Comments: No data; probably opportunistic.
Number of Occurrences
Note: For many non-migratory species, occurrences are roughly equivalent to populations.
Estimated Number of Occurrences: Unknown
Life History and Behavior
Comments: No data.
No data on amplexus or brooding.
IUCN Red List Assessment
Red List Category
Red List Criteria
National NatureServe Conservation Status
Rounded National Status Rank: N3 - Vulnerable
NatureServe Conservation Status
Rounded Global Status Rank: G3 - Vulnerable
Reasons: This species occurs in unpopulated areas of Oregon and Idaho. Complete distribution is not known and threats and trends have not been assessed.
This species is sensitive to stream quality, urbanization and agriculture activities, which impact the habitat requirements for this species.
Degree of Threat: Unknown
Global Protection: Unknown whether any occurrences are appropriately protected and managed
Relevance to Humans and Ecosystems
Comments: No known economic value.