Nitzschia columbiana
Sovereign 1958 Category: Nitzschioid
BASIONYM: Nitzschia columbiana Sovereign 1958
LM scalebar = 10 µm = 80 pixels.
Observations
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
Description
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.
Original Description
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
Original Description
Original Images
Cite This Page:
Kociolek, P. (2011). Nitzschia columbiana. In Diatoms of the United States. Retrieved June 20, 2013, from http://westerndiatoms.colorado.edu/taxa/species/nitzschia_columbiana
Species: Nitzschia columbiana
Contributor: Pat Kociolek
Reviewer: Rex Lowe
Image Credit: Pat Kociolek
- Apices cuneate, subrostrate
- Breadth 3-5 µm
- Fibulae number 6-8 in 10 µm
- Striae faintly visible to unresolvable
Valves are linear, with cuneate to subrostrate apices. Keel excentric, with fibulae numbering 6-8 in 10 µm. Striae faintly visible to unresolvable.
Compare
Nitzschia columbiana is distinguished from N. exilis by the wider valves and coarse fibulae.
Nitzschia exilis
Citations
Sovereign, H.E. (1958). The diatoms of Crater Lake, Oregon. Transactions of the American Microscopical Society 77(2):96-134.
Links & ID's
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
North American Diatom Ecological Database (NADED)
NADED ID: