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Pinnularia suchlandtii

Hust. 1943      Category: Symmetrical biraphid

Pinnularia saprophila


Pinnularia turfosiphila

LM scalebar = 10 µm = 40 pixels.


Contributor: Loren Bahls - March 2014
Length Range: 54-75 µm
Width Range: 11.8-16.7 µm
Striae in 10 µm: 10-11


Valves are linear to linear-lanceolate, with undifferentiated rounded apices. The axial area is narrow and widens abruptly just short of the central area. The central area is a rhombus, open on both sides to form a fascia. The raphe is weakly lateral and slightly complex. Proximal raphe ends are bent to one side and terminate with small tear-shaped pores. Distal raphe fissures are shaped like question marks. Striae are strongly radiate at the valve center and become strongly convergent near the apices.

The shape of this taxon from the Northwest United States is more linear and less lanceolate, than the original European description.

Note that the description of P. suchlandtii first published (Schmidt 1934) was invalid. It was later validly published (Hustedt 1943).

Original Description

Author: Hust. 1943
Length Range: µm
Striae in 10 µm:

Original Description

Original Images

Cite This Page:
Bahls, L. (2014). Pinnularia suchlandtii. In Diatoms of the United States. Retrieved May 26, 2018, from

Species: Pinnularia suchlandtii

Contributor: Loren Bahls

Reviewer: Marina Potapova


Hustedt, F. (1943). Die Diatomeenflora einiger Hochgebirgsseen der Landschaft Davos in den schweizer Alpen. Internationale Revue der gesamten Hydrobiologie und Hydrographie 43:124-197, 225-280.

Krammer, K. (1992). Die Gattung Pinnularia in Bayern. Hoppea 52: 1-308.

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

Krammer, K. and Lange-Bertalot, H. (1986). Bacillariophyceae. 1. Teil: Naviculaceae. In: Ettl, H., J. Gerloff, H. Heynig and D. Mollenhauer (eds.) Süsswasserflora von Mitteleuropa, Band 2/1. Gustav Fisher Verlag, Jena. 876 pp.

Schmidt, A. (-). (1874-1959). Atlas der Diatomaceen-Kunde, von Adolf Schmidt, continued by Martin Schmidt, Friedrich Fricke, Heinrich Heiden, Otto Muller, Friedrich Hustedt. Reprint 1984, Koeltz Scientific Books, Konigstein, 480 plates.

Simonsen, R. (1987). Atlas and Catalogue of the Diatom Types of Friedrich Hustedt. J. Cramer, Berlin & Stuttgart 1: 525 pp.

Links & ID's

Index Nominum Algarum (INA)

Transfer INA

California Academy of Sciences (CAS)

Pinnularia suchlandtii CAS

North American Diatom Ecological Database (NADED)

NADED ID: 52201

Autecology Discussion

The specimens of P. suchlandtii that are pictured and described on this taxon page are from small lakes in the North Cascades and northern Rocky Mountains. These lakes have cold water, low pH (6.5-7.5) and very low conductivity (7-10 µS/cm). Krammer (2000) reports this species from small, oxygen-rich alpine European lakes with cold waters and low electrolyte content.


Blodgett Lake, Bitterroot Mountains, Ravalli County, Montana: home of Pinnularia suchlandtii.

Credit/Source: R. A. Carlsen