Navicymbula pusilla

(Grunow in A. Schmidt) Krammer 2003      Category: Asymmetrical biraphid
BASIONYM: Cymbella pusilla Grunow in Schmidt et al. 1875
SYNONYM(S): Navicella pusilla (Grunow) Krammer | Seminavis pusilla (Grunow) Cox and Reid 

Navicula winona


Neidiomorpha binodiformis

LM scalebar = 10 µm = 80 pixels.


Contributor: Marina Potapova - October 2011
Length Range: 16-33 µm
Width Range: 4.2-5.9 µm
Striae in 10 µm: 16-18 in the center valve, 19-20 at the ends


Valves are moderately dorsiventral with an arched dorsal margin and flat, or slightly convex, ventral margin. The apices are not protracted. The axial area is narrow and widens in the valve center to form a small, lanceolate central area. The raphe is straight and weakly lateral, with external proximal ends and terminal fissures hooked to the dorsal side. Striae are radiate in the valve center, becoming convergent at the ends. Areolae are apically elongated and number 45-55 in 10 μm.

Original Description

Basionym: Cymbella pusilla
Author: Grunow in Schmidt et al. 1875
Length Range: µm
Striae in 10 µm:

Original Description

Original Images

Cite This Page:
Potapova, M. (2011). Navicymbula pusilla. In Diatoms of the United States. Retrieved August 25, 2016, from

Species: Navicymbula pusilla

Contributor: Marina Potapova

Reviewer: Sarah Spaulding


Cox, E.J. and Reid, G. (2004). Generic relationships within the Naviculineae: a preliminary cladistic analysis. M. Poulin (ed.), Proceedings of the Seventeenth International Diatom Symposium, Ottawa, Canada, 25th-31st August 2002. Biopress Limited, Bristol, U.K. pp. 49-62.

Krammer, K. (1997). Die cymbelloiden Diatomeen. Eine Monographie der weltweit bekannten Taxa. Teil 1. Allgemeines und Encyonema. Bibliotheca Diatomologica 36: 1-382.

Krammer, K. (2003). Cymbopleura, Delicata, Navicymbula, Gomphocymbellopsis, Afrocymbella. Diatoms of Europe. Diatoms of the European Inland Waters and Comparable Habitats 4: 1-530.

Links & ID's

Index Nominum Algarum (INA)

California Academy of Sciences (CAS)

Navicymbula pusilla CAS

North American Diatom Ecological Database (NADED)

NADED ID: 47309

Autecology Discussion

Navicymbula pusilla is found in waters of high mineral content.