Distinguishing Features
Many herpetologists think that the
Coeur d'Alene Salamander is the same species as the Van Dyke's Salamander
(Plethodon vandykei), that has become separated into two geographically
distinct populations. Adults are shorter and stockier through the
body than other plethodon salamanders. There are 14 costal grooves
in the back. They are blackish in colour with a wide yellow, reddish
or greenish dorsal stripe with conspicuous ragged edges. The underside
has white flecks on the belly and may have blotches of pale yellow
on the throat. Total length varies up to 58 mm. (Corkran & Thoms,
1996).
Distribution
Columbia Basin: The
known occurrences are restricted to the east side of Kootenay Lake
and the lower Moyie River drainage.(Cannings et al. 1999).
British Columbia: Occurs only in
the Columbia Basin as above.
Global: Southeastern
British Columbia, northwestern Montana and northern Idaho.
Habitat
Coeur d'Alène Salamanders have very
particular habitat requirements and a restricted range. They
live in wet seeps, waterfall splash zones and streamside riparian
habitats (Cannings et al. 1999). They also occur on shaded or north-facing
slopes in moist, mossy talus or fractured rock outcrops with slowly
seeping water (Corkran & Thoms, 1996).
Threats
There are numerous ways that logging
can affect populations-there may be increased sedimentation, removal
of riparian vegetation as well as fragmentation that will isolate
populations making them susceptible to local extirpation. Highway
maintenance such as widening, rock scaling and herbicide application;
trail building; fire; and water diversion projects all could have
deleterious affects (Cannings et al. 1999).
Biology
This salamander requires deeply
fractured rock formations into which it can retreat to avoid desiccation
in the hot dry portions of the summer and the freezing temperatures
of the winter. They have restricted overland movements due to their
aquatic nature, particularly in arid areas or areas where there
is little canopy cover. As a result, populations are often isolated.
Coeur d'Alène Salamanders mate in late summer or autumn. The female
will store the sperm for up to nine months before fertilizing the
eggs. An average of six eggs are deposited in April with the young
emerging in mid-September (Cannings et al. 1999).