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Diatoms of the United States is now known as Diatoms of North America.
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Pinnularia saprophila

Lange-Bert., H.Kobayasi and Krammer 2000      Category: Symmetrical biraphid

Pinnularia rhombarea


Pinnularia suchlandtii

LM scalebar = 10 µm = 80 pixels.


Contributor: Marina Potapova | Ian O'Malley - October 2013
Length Range: 22-45 µm
Width Range: 5.2-6.7 µm
Striae in 10 µm: 10-12


Valves are linear with apices that are capitate in larger specimens to slightly protracted in smaller specimens. The axial area is lanceolate widening into a large central area reaching the valve margins. The raphe is almost straight, with proximal ends deflected to one side. Striae are often slightly bent, radiate near the valve center and become extremely convergent at the apices.

Note that some specimens from US have a higher stria density than specified in the original description. Most specimens in the study populations, however, had stria density that fit the original description of P. saprophila.

Original Description

Author: Lange-Bert., H.Kobayasi and Krammer in Krammer 2000
Length Range: 21-45 µm
Width Range: 5.7-7.5 µm
Striae in 10 µm: 9.5-11

Original Description

Original Images

Cite This Page:
Potapova, M., and O'Malley, I. (2013). Pinnularia saprophila . In Diatoms of the United States. Retrieved May 22, 2018, from

Species: Pinnularia saprophila

Contributor: Marina Potapova | Ian O'Malley

Reviewer: Sam Rushforth


Krammer, K. (2000). The genus Pinnularia. The Diatoms of Europe. Diatoms of Inland Waters and Comparable Habitats 1: 1-703.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Pinnularia saprophila CAS

North American Diatom Ecological Database (NADED)


Autecology Discussion