Gomphoneis pseudo-okunoi

Tuji 2005      Category: Asymmetrical biraphid

Gomphoneis oreophila


Gomphoneis septa

LM scalebar = 10 µm = 80 pixels.


Contributor: Pat Kociolek - January 2011
Length Range: 11-30 µm
Width Range: 4-7 µm
Striae in 10 µm: 13-15


Valves are clavate, with a broadly rounded headpole and narrow footpole. The axial area is very narrow, straight, broadening at the center to form an irregularly rectangular central area. Four isolated stigmoids are present in the central area. The raphe is straight, filiform. Striae appear costate, without resolvable puncta. Apical pore fields appear as condensed striae.

Distribution: Widely distributed in northern sections of North America, usually in circum-neutral to alkaline environments.

Original Description

Author: Tuji 2005
Length Range: µm
Striae in 10 µm:

Original Description

Original Images

Cite This Page:
Kociolek, P. (2011). Gomphoneis pseudo-okunoi. In Diatoms of the United States. Retrieved April 26, 2018, from http://westerndiatoms.colorado.edu/taxa/species/gomphoneis_pseudookunoi

Species: Gomphoneis pseudo-okunoi

Contributor: Pat Kociolek

Reviewer: Sam Rushforth


Hustedt, F. (1950). Die Diatomeenflora norddeutscher Seen mit besonderer Berücksichtigung des holsteinischen Seengebiets V-VII. Seen in Mecklenburg, Lauenburg und Nordostdeutschland. Archiv für Hydrobiologie 43:329-458, Tafs 21-41.

Kociolek, J.P. and Stoermer, E.F. (1988). Taxonomy, ultrastructure and distribution of Gomphoneis herculeana, G. eriense and closely related species (Naviculales: Gomphonemataceae). Proc. Acad. Nat. Sci. Phil. 140: 24-97. http://www.jstor.org/stable/4064935

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

Tuji, A. (2005). Taxonomy of the Gomphoneis tetrastigmata species complex. Bull. Natn. Sci. Mus., Tokyo, Ser. B, 31(3): 89-108.

Links & ID's

Index Nominum Algarum (INA)

California Academy of Sciences (CAS)

North American Diatom Ecological Database (NADED)


Autecology Discussion