Geissleria kriegeri

(Krasske) Lange-Bert. in Lange-Bert. and Metzeltin 1996      Category: Symmetrical biraphid
BASIONYM: Navicula kriegeri Krasske 1943

Geissleria ignota


Geissleria lateropunctata

LM scalebar = 10 µm = 80 pixels.


Contributor: Marina Potapova - December 2010
Length Range: 11-23 µm
Width Range: 5.0-7.5 µm
Striae in 10 µm: 16-23


Valves are elliptical-lanceolate with subrostrate ends, 5.0-7.5 µm wide and 11-23 µm long. The raphe is straight and filiform. The axial area is narrow and linear. The central area is small, without isolated areolae. Striae are uniseriate, radiate, and number 16-23 in 10 µm. Areolae are apically elongated and number approximately 65-70 in 10 µm. Subpolar areolae, or annulae, are larger than areolae on other parts of the valve. The annulae form three-four rows at each pole. Note that North American specimens have slightly more drawn-out valve apices than European specimens. This morphological difference may indicate that North American “G. kriegeri” is another species.

Original Description

Basionym: Navicula kriegeri
Author: Krasske 1943
Length Range: 14-19 µm
Width Range: 6-7 µm
Striae in 10 µm: 16

Original Description

Schalen elliptisch bis lanzettlich-elliptisch mit breit gerundeten Enden. 14—19 μ lang, 6—7 μ breit. Area sehr eng, in der Mitte kaum erweitert. Streifen wenig radial, etwa 16 in 10 μ, nach den Enden enger.

Original Images

Cite This Page:
Potapova, M. (2010). Geissleria kriegeri. In Diatoms of the United States. Retrieved April 23, 2018, from

Species: Geissleria kriegeri

Contributor: Marina Potapova

Reviewer: Sam Rushforth


Krasske, G. (1943). Zur Diatomeenflora Lapplands. Bericht der Deutschen Botanischen Gessellschaft 61(3): 81-88.

Lange-Bertalot, H. and Metzeltin, D. (1996). Indicators of oligotrophy - 800 taxa representative of three ecologically distinct lake types, Carbonate buffered - Oligodystrophic - Weakly buffered soft water. Lange-Bertalot, H. (ed.), Iconographia Diatomologica. Annotated Diatom Micrographs. Vol. 2. Ecology, Diversity, Taxonomy. Koeltz Scientific Books. Königstein, Germany, 2:390 pp.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Geissleria kriegeri CAS

North American Diatom Ecological Database (NADED)

NADED ID: 210007

Autecology Discussion