(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
Contributor: Pat Kociolek - September 2011
Length Range: 27-54 µm
Width Range: 8-10 µm
Striae in 10 µm: 30-32
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).
Basionym: Nitzschia calida
Author: Grunow in Cleve and Grunow; Grunow in Van Heurck
Length Range: µm
Striae in 10 µm:
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.
The Environmental Protection Agency (EPA) western Environmental Monitoring and Assessment Program (EMAP) study was completed during the years 2000-2004 (see citations at bottom of this page). Over 1200 streams and rivers in 12 western states (Arizona, California, Colorado, Idaho, Montana, Nevada, North Dakota, Oregon, South Dakota, Utah, Washington and Wyoming) were selected for sampling based on a stratified randomized design. This type of design insures that ecological resources are sampled in proportion to their actual geographical presence. Stratified randomized design also allows for estimates of stream length with a known confidence in several “condition classes” (good or least-disturbed, intermediately-disturbed, and poor or most-disturbed) for biotic condition, chemistry and habitat.
Results are published in:
Johnson, T., Hermann, K., Spaulding, S., Beyea, B., Theel, C., Sada, R., Bollman, W., Bowman, J., Larsen, A., Vining, K., Ostermiller, J., Petersen, D. Hargett, E. and Zumberge, J. (2009). An ecological assessment of USEPA Region 8 streams and rivers. U.S. Environmental Protection Agency Region 8 Report, 178 p.
Stoddard, J. L., Peck, D. V., Olsen, A. R., Larsen, D. P., Van Sickle, J., Hawkins, C. P., Hughes, R. M., Whittier, T. R., Lomnicky, G. A., Herlihy, A. T., Kaufman, P. R., Peterson, S. A., Ringold, P. L., Paulsen, S. G., and Blair, R. (2005). Environmental Monitoring and Assessment Program (EMAP) western streams and rivers statistical summary. U.S. Environmental Protection Agency Report 620/R-05/006, 1,762 p.
Stoddard, J. L., Peck, D. V., Paulsen, S. G., Van Sickle, J., Hawkins, C. P., Herlihy, A. T., Hughes, R. M., Kaufman, P. R., Larsen, D. P., Lomnicky, G. A., Olsen, A. R., Peterson, S. A., Ringold, P. L., and Whittier, T. R. (2005). An ecological assessment of western streams and rivers. U.S. Environmental Protection Agency Report 620/R-05/005, 49 p.