Nitzschia amphibia
Grunow 1862 Category: Nitzschioid
BASIONYM: Nitzschia amphibia Grunow 1862
SYNONYM(S): Homoeocladia amphibia (Grunow) Kuntze 1898 | Bacillaria amphibia (Grunow) Elmore in Barbour 1895
LM scalebar = 10 µm = 80 pixels.
Observations
Contributor: Pat Kociolek - March 2011
Length Range: 14-37 µm
Width Range: 4.0-4.5 µm
Striae in 10 µm: 14-18
Description
Valves are linear to lanceolate. The valves taper to bluntly rounded apices. Fibulae are distinct and number 7-9 in 10 µm. The central nodule is evident. Striae are characteristically prominent and distinctly punctate, but not necessarily regularly spaced.
Original Description
Basionym: Nitzschia amphibia
Author: Grunow 1862
Length Range: µm
Striae in 10 µm:
Original Description
Original Images
Cite This Page:
Kociolek, P. (2011). Nitzschia amphibia. In Diatoms of the United States. Retrieved July 25, 2014, from http://westerndiatoms.colorado.edu/taxa/species/nitzschia_amphibia
Species: Nitzschia amphibia
Contributor: Pat Kociolek
Reviewer: Rex Lowe
Image Credit: Pat Kociolek
- Valves are linear to lanceolate
- Striae distinctly punctate
- Central nodule present
Valves taper to bluntly rounded apices. Fibulae are distinct, 7-9 in 10 µm. The central nodule, evident as a wider space between two central fibulae, is present. Striae are characteristically prominent and distinctly punctate, and may be irregularly spaced.
Compare
The distinctly punctate striae are characteristic of this species and differentiate it from N. alpina. Nitzschia amphibia is often found in the same habitats as N. amphibioides and is of similar size and shape. However, N. amphibia lacks the thickened fibulae that are characteristic of N. amphibioides. Furthermore, N. amphibia has a prominent central nodule, which N. amphibioides lacks.
Nitzschia alpina
Nitzschia amphibioides
Citations
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)
NCBI Genbank Taxonomy
North American Diatom Ecological Database (NADED)
NADED ID: 48004