Nitzschia columbiana

Sovereign 1958      Category: Nitzschioid

Nitzschia clausii


Nitzschia communis

LM scalebar = 10 µm = 80 pixels.


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.

Original Description

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 April 24, 2018, from

Species: Nitzschia columbiana

Contributor: Pat Kociolek

Reviewer: Rex Lowe


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)

Original INA

California Academy of Sciences (CAS)

Nitzschia columbiana CAS

North American Diatom Ecological Database (NADED)


Autecology Discussion