(Hustedt) Lange-Bertalot and Metzeltin in Lange-Bertalot and Genkal 1999 Category: Symmetrical biraphid
BASIONYM: Navicula levanderi Hustedt in A. Schmidt 1934
SYNONYM(S): Neidium levanderi (Hustedt) Lange-Bertalot and Metzeltin 1996
Contributor: Loren Bahls - January 2012
Length Range: 27-47 µm
Width Range: 6.6-8.9 µm
Striae in 10 µm: 21-24
Valves are linear and triundulate. The undulations are approximately equal in width, or the middle undulation is slightly wider. A longitudinal line runs along each side of the valve. The apices are broadly rostrate. The axial area is narrow, barely wider than the raphe. The central area is elliptic and about half the width of the valve at center but somewhat wider in large specimens. The raphe is filiform and the proximal ends are straight and not expanded. Striae are moderately radiate at the center, becoming parallel then weakly convergent at the apices. Areolae in the striae are distinct in LM and number 20-24 in 10 µm.
Basionym: Navicula levanderi
Author: Hustedt in A. Schmidt 1934
Length Range: µm
Striae in 10 µm:
Hustedt, F. (1937). Sußwasserdiatomeen von Island, Spitzbergen und den Färöer-Inseln. Botanisches Archiv 38:152-207.
Lange-Bertalot, H. (2001). Navicula sensu stricto, 10 genera separated from Navicula sensu lato, Frustulia. Diatoms of Europe 2: 1-526.
Lange-Bertalot, H. and Genkal, S.I. (1999). Diatoms from Siberia I. Islands in the Arctic Ocean (Yugorsky-Shar Strait). Iconographia Diatomologica 6: 1-292.
Lange-Bertalot, H. and Metzeltin, D. (1996). Indicators of oligotrophy - 800 taxa representative of three ecologically distinct lake types, Carbonate buffered - Oligodystrophic - Weakly buffered soft water. Lange-Bertalot, H. (ed.), Iconographia Diatomologica. Annotated Diatom Micrographs. Vol. 2. Ecology, Diversity, Taxonomy. Koeltz Scientific Books. Königstein, Germany, 2:390 pp.
Schmidt, A. (-). (1874-1959). Atlas der Diatomaceen-Kunde, von Adolf Schmidt, continued by Martin Schmidt, Friedrich Fricke, Heinrich Heiden, Otto Muller, Friedrich Hustedt. Reprint 1984, Koeltz Scientific Books, Konigstein, 480 plates.
Simonsen, R. (1987). Atlas and Catalogue of the Diatom Types of Friedrich Hustedt. J. Cramer, Berlin & Stuttgart 1: 525 pp.
Neidiopsis levanderi is uncommon in oligotrophic and low-conductivity lakes of the Northern Rocky Mountains. In these habitats the pH ranges from 6.73 to 7.60 and specific conductance ranges from 22 to 67 µS/cm. This species has also been reported from the Great Lakes and the Northeastern United States. It is also found in arctic, sub-arctic, and alpine zones of Europe and Asia (Lange-Bertalot 2001).
Trilobite Lake below Trilobite Peak in the heart of the Bob Marshall Wilderness, western Montana. Trilobite Lake is home to Neidiopsis levanderi.
Credit/Source: Loren Bahls