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Navicula subrostellata

Hust. 1955      Category: Symmetrical biraphid

REPORTED AS: Navicula secreta var. apiculata (Patrick 1959) | Navicula ammophila (Witkowski et al. 2000) 

Navicula subrhynchocephala


Navicula subwalkeri

LM scalebar = 10 µm = 80 pixels.


Contributor: Marina Potapova - October 2011
Length Range: 27-31 µm
Width Range: 6.0-6.8 µm
Striae in 10 µm: 14-16


Valves are lanceolate to linear-lanceolate with protracted apices. The axial area is narrow and straight. The central area is round. External proximal raphe ends are straight and close to each other. Striae are straight and slightly radiate around the center, becoming parallel, then convergent at the apices. The areolae are clearly visible under LM, 23-26 in 10 μm.

Original Description

Author: Hust. 1955
Length Range: 30 µm
Width Range: 6 µm
Striae in 10 µm: 15

Original Description

Valves linear with parallel margins and strongly rostate acute ends, about 30 μ long, 6 μ broad. Raphe straight, threadlike, with approximate central pores; axial area very narrow; central area small, elongate-elliptical. Transapical striae slightly radiate, slightly convergent at the ends, about 15 in 10 μ, rather coarsely lineate, lineolae about 24 in 10 μ.

Original Images

Cite This Page:
Potapova, M. (2011). Navicula subrostellata. In Diatoms of the United States. Retrieved May 23, 2018, from

Species: Navicula subrostellata

Contributor: Marina Potapova

Reviewer: Sam Rushforth


Hustedt, F. (1955). Marine littoral diatoms of Beaufort, North Carolina. Marine Station Bulletin 6:67 pp., 16 pls.

Patrick, R.M. (1959). New species and nomenclatural changes in the genus Navicula (Bacillariophyceae). Proceedings of the Academy of Natural Sciences of Philadelphia 111 (1959): 91-108 .

Witkowski, A., Lange-Bertalot, H. and Metzeltin, D. (2000). Diatom Flora of Marine Coasts I. Iconographia Diatomologica 7: 1-925.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Navicula subrostellata CAS

North American Diatom Ecological Database (NADED)


Autecology Discussion

Brackish water; in inland waters of high ionic content, estuaries, and in coastal habitats