Tryblionella calida
(Grunow in Cleve and Grunow; Grunow in Van Heurck) Stroganov et al. 1927 Category: Nitzschioid
BASIONYM: Nitzschia calida Grunow in Cleve and Grunow; Grunow in Van Heurck
LM scalebar = 10 µm = 80 pixels.
Observations
Contributor: Pat Kociolek - September 2011
Length Range: 27-54 µm
Width Range: 8-10 µm
Striae in 10 µm: 30-32
Description
Valves linear, slightly concave in the middle of the valve, apices narrow, drawn out and narrowly rounded. The keel is strongly excentric, with the central nodule formed by two fibulae more distant from the others along the keel. Fibulae 7-9 in 10 µm. A narrow, indistinct fold runs along the longitudinal axis of the valve. The fold is barely undulate or may even appear not to rise or taper from the main valve surface. Transapical ribs distinct, about 12-16 in 10 µm. Striae are indistinct, seen only with DIC or oblique light with brightfield microscopy.
Stroganov (1927) made the valid transfer of Nitzschia calida Grunow in Cleve &Grunow to Tryblionella before Mann in Round et al.(1990).
Original Description
Basionym: Nitzschia calida
Author: Grunow in Cleve and Grunow; Grunow in Van Heurck
Length Range: µm
Striae in 10 µm:
Original Description
Original Images
Cite This Page:
Kociolek, P. (2011). Tryblionella calida. In Diatoms of the United States. Retrieved May 20, 2013, from http://westerndiatoms.colorado.edu/taxa/species/tryblionella_calida
Species: Tryblionella calida
Contributor: Pat Kociolek
Reviewer: Rex Lowe
Image Credit: Pat Kociolek
- Valves slightly concave in the middle of the valve
- Apices protracted, narrowly rounded
- Narrow, indistinct fold present
- Transapical ribs distinct, 12-16 in 10 µm
- Fibulae number 7-9 in 10 µm
Valves are linear and slightly concave in the middle of the valve. The apices narrow, drawn out and narrowly rounded. A narrow, indistinct fold runs along the longitudinal axis of the valve. The fold is barely undulate, or may not appear elevated or depressed from the main valve surface. Transapical ribs are distinct. Striae are indistinct.
Compare
Tryblionella calida is smaller and with a less distinct longitudinal fold than other members of the genus.
Tryblionella hungarica
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)
North American Diatom Ecological Database (NADED)
NADED ID: 185021