Navicula angusta

Grunow 1860      Category: Symmetrical biraphid
BASIONYM: Navicula angusta Grunow 1860

Navicula aitchelbee


Navicula antonii

LM scalebar = 10 µm = 40 pixels.


Contributor: Marina Potapova - February 2011
Length Range: 35-70 µm
Width Range: 6-7 µm
Striae in 10 µm: 11-12


Valves are linear with slightly protracted ends. Axial area is narrow. Central area is moderately asymmetrical, wedge-shaped or irregularly shaped. The central area is larger on the primary side, and semi-elliptical and smaller on the secondary side, but in some specimens it may be nearly symmetrical. Central raphe endings are slightly expanded. Striae are radiate at the central valve, convergent near the apices. Striae are 11-12 in 10 µm. Areolae are lineolate, with approximately 32 in 10 µm.

Original Description

Basionym: Navicula angusta
Author: Grunow 1860
Length Range: 43-51 µm
Width Range: 5.1-5.8 µm
Striae in 10 µm: 12.6

Original Description

Navicula a latere secundo anguste lanceolata, apicibus obsolete productis, nodulo centrali oblongo, striis obscure punctatis radiantibus 32 in 0.001’”. Longitud. 0.0020-0.0017”, latid. 0.0002-0.00023”.

Original Images

Cite This Page:
Potapova, M. (2011). Navicula angusta . In Diatoms of the United States. Retrieved August 30, 2016, from

Species: Navicula angusta

Contributor: Marina Potapova

Reviewer: Sarah Spaulding


Grunow, A. (1860). Uber neue oder ungenügend gekannte Algen. Verhandlungen der Kaiserlich-Königlichen Zoologisch-Botanischen Gesellschaft in Wein, 10: 503-582.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Navicula angusta CAS

North American Diatom Ecological Database (NADED)

NADED ID: 46002

Autecology Discussion