Pacifastacus leniusculus
(Signal Crayfish)
© Ian Gardiner (Photo ID #84997)
Photographer's Submitted Details
Photo Location
Columbia River, Trail, BC
Photographer
Ian Gardiner
Habitat
Boulders/sand
Photo Date
Upload Date
October 23, 2015
Elevation (m)
Latitude
Longitude
Photo ID #
84997
Comments
Male rostrum, showing a single pair of marginal tubercles/spines. Within genus Pacifastacus this indicates species leniusculus. Two characteristics of subspecies klamathensis can be seen here, 1) acumen is shorter than the rostrum is wide (at the level of the marginal tubercles/spines), 2) postorbital ridges are without tubercles/spines posteriorly. Preserved specimen. Collected 20 Oct 2015.