Nitzschia linearis
(Agardh) W. Smith 1853 Category: Nitzschioid
BASIONYM: Frustulia linearis Agardh
LM scalebar = 10 µm = 40 pixels.
Observations
Contributor: Pat Kociolek - March 2011
Length Range: 60-150 µm
Width Range: 4-6 µm
Striae in 10 µm: 35-38
Description
Valves are linear to linear-lanceolate with parallel sides, except near the center of the side bearing the keel, which is concave. The apices are rounded and nearly capitate. The raphe is positioned excentrically, with a distinct central nodule. Fibulae vary in size and number 11-14 in 10 µm. Striae are resolvable and parallel. There are specimens in which the punctate nature of the striae is visible with LM.
Original Description
Basionym: Frustulia linearis
Author: Agardh
Length Range: µm
Striae in 10 µm:
Original Description
Original Images
Cite This Page:
Kociolek, P. (2011). Nitzschia linearis. In Diatoms of the United States. Retrieved May 22, 2013, from http://westerndiatoms.colorado.edu/taxa/species/nitzschia_linearis
Species: Nitzschia linearis
Contributor: Pat Kociolek
Reviewer: Kalina Manoylov
Image Credit: Pat Kociolek
- Length 60-150 µm
- Striae 35-38 in 10 µm
- Central nodule distinct central
Valves are linear to linear-lanceolate, with sides parallel, except the side bearing the keel which is concave in the center. Apices rounded, nearly capitate. A distinct central nodule is present. Striae are resolvable.
Compare
The length, narrow valves, and distinct nature of the central nodule help to distinguish this species from other linear taxa such as N. recta, in which the striae are not visible and N. intermedia, which is smaller in size and lacks a distinct central nodule.
Nitzschia recta
Nitzschia intermedia
Hantzsch ex Cleve & Grunow 1880
Citations
Hustedt, F. (1930). Die Kieselalgen Deutschlands, Osterreichs und der Schweiz mit Berucksichtigung der ubrigen Lander Europas sowie der angrenzenden Meersgebiete. In: Dr. L. Rabenhorst's Kryptogamen-Flora von Deutschland, Osterreich und der Schweiz. Leipzig, Akademische Verlagsgesellschaft Geest und Portig K.-G. Vol. 7, Part 3, pp. 557-816.
Krammer, K. and Lange-Bertalot, H. (1988). Bacillariophyceae. 2. Teil: Bacillariaceae, Epithemiaceae, Surirellaceae. In: Ettl, H., J. Gerloff, H. Heynig and D. Mollenhauer (eds.) Susswasserflora von Mitteleuropa, Band 2/2. Gustav Fisher Verlag, Jena.
Links & ID's
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
North American Diatom Ecological Database (NADED)
NADED ID: 48023