Sovereign 1958 Category: Nitzschioid
BASIONYM: Nitzschia columbiana Sovereign 1958
Contributor: Pat Kociolek - February 2011
Length Range: 25-70 µm
Width Range: 3-5 µm
Striae in 10 µm: Striae not visible to only faintly visible
Valves are linear with cuneate to subrostrate apices. The keel is strongly excentric, with fibulae numbering 6-8 in 10 µm. Striae faintly visible to unresolvable.
Inspection of the holotype slide, and other slides from the type locality, have revealed specimens as small as 25 µm in length. Note that the original description documented a range of 50-75 µm in length (Sovereign 1958, p. 131).
Found throughout the Pacific NW.
Basionym: Nitzschia columbiana
Author: Sovereign 1958
Length Range: 50-75 µm
Width Range: 3.5-5.0 µm
Striae in 10 µm: Unresolvable in LM
Sovereign, H.E. (1958). The diatoms of Crater Lake, Oregon. Transactions of the American Microscopical Society 77(2):96-134.