Contributor: Pat Kociolek -
Length Range: 24-64 µm
Width Range: 2-3 µm
Striae in 10 µm: Not visible in the light microscope
Valves are delicate, narrowly lanceolate with rostrate and subcapitate apices. Keel strongly excentric, fibulae 15-17 in 10 µm and of differing sizes. The striae are not resolvable in the light microscope.
This specimen is easily overlooked in sample due to their delicate nature. Found in low numbers throughout the Pacific Northwest.
Basionym: Nitzschia exilis
Author: Sovereign 1958
Length Range: µm
Striae in 10 µm:
Sovereign, H.E. (1958). The diatoms of Crater Lake, Oregon. Transactions of the American Microscopical Society 77(2):96-134.