Gomphoneis pseudokunoi
Tuji 2005 Category: Asymmetrical biraphid
BASIONYM: Gomphoneis pseudokunoi Tuji 2005
LM scalebar = 10 µm = 80 pixels.
Observations
Contributor: Pat Kociolek - January 2011
Length Range: 11-30 µm
Width Range: 4-7 µm
Striae in 10 µm: 13-15
Description
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
Basionym: Gomphoneis pseudokunoi
Author: Tuji 2005
Length Range: µm
Striae in 10 µm:
Original Description
Original Images
Cite This Page:
Kociolek, P. (2011). Gomphoneis pseudokunoi. In Diatoms of the United States. Retrieved May 23, 2013, from http://westerndiatoms.colorado.edu/taxa/species/gomphoneis_pseudokunoi
Species: Gomphoneis pseudokunoi
Contributor: Pat Kociolek
Reviewer: Sam Rushforth
Image Credit: Pat Kociolek
- Valves clavate
- Isolated stigmoids, four in the central area
- Striae without resolvable areolae
Valves clavate. Axial area very narrow, straight, with filiform raphe. Central area rectangular with four isolated stigmoids. Striae costate, areolae not resolved. Apical pore fields appear as condensed striae.
Compare
Gomphoneis pseudokunoi is similar to G. olivaceoides, but is distinguished by its costate striae and more slender valves. Gomphoneis quadripunctata, which also has four isolated stigmoids in the central area, is larger and broader than G.pseudokunoi.
Gomphoneis olivaceoides
(Hustedt) Carter & Bailey-Watts
Gomphoneis quadripunctata
(Østrup) P. A. Dawson ex R. Ross & P. A. Sims
Citations
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)
NADED ID: