Grunow in Van Heurck 1880 Category: Symmetrical biraphid
SYNONYM(S): Navicula viridula var. slesvicensis (Grunow in Van Heurck) Grunow in Cleve and Moller
Valves are linear-elliptic to linear-lanceolate with apices that are wedge-shaped in smaller specimens and more produced, subrostrate in larger specimens. The axial area is narrow and straight. The central area is transversely elliptic or irregularly rhomboid. The raphe is straight, moderately lateral, with dilated external proximal raphe ends. The central nodule is symmetric. Striae are radiate in the valve center, more widely spaced about the central area and convergent at the apices. The areolae are visible under LM and number approximately 25 in 10 μm.
Author: Grunow in Van Heurck 1880
Length Range: µm
Striae in 10 µm:
Cite This Page:
Potapova, M., and Bahls, L. (2011). Navicula slesvicensis . In Diatoms of the United States. Retrieved April 18, 2015, from http://westerndiatoms.colorado.edu/taxa/species/navicula_slesvicensis
Species: Navicula slesvicensis
Reviewer: Rex Lowe
Lange-Bertalot, H. (2001). Navicula sensu stricto, 10 genera separated from Navicula sensu lato, Frustulia. Diatoms of Europe 2: 1-526.
Van Heurck, H. (1880). Synopsis des Diatomées de Belgique. Atlas. Ducaju & Cie., Anvers.
Navicula slesvicensis has been reported from creeks and rivers in Montana, North Dakota and Wyoming, where it prefers warm, muddy waters rich in sodium sulfate and organic nitrogen. Common diatom associates of N. slesvicensis in these streams include Navicula peregrina, Entomoneis paludosa, Navicula salinarum, Ctenophora pulchella, Entomoneis alata, Biremis circumtexta, Craticula halophila, Tabularia fasciculata, Pleurosigma delicatulum, Fragilaria famelica, Navicula goersii, and Fallacia tenera. In Europe, Navicula slesvicensis is found in electrolyte-rich freshwaters and in coastal waters, estuaries, and inland salt springs (Lange-Bertalot 2001).