Simonsenia delognei

Lange-Bertalot 1979      Category: Nitzschioid
BASIONYM: Nitzschia delognei Grunow in Van Heurck 1885

Sellaphora wallacei


Spicaticribra kingstonii

LM scalebar = 10 µm = 80 pixels.


Contributor: Carrie Graeff - October 2012
Length Range: 9.5-14.5 µm
Width Range: 2.5 µm
Striae in 10 µm:


The valves are small and lanceolate or linear-lanceolate with apices that are extremely narrowly rounded and often protracted. The striae are generally biseriate but become multiseriate and disorganized near the raphe canal. The striae are not resolvable in the LM, but the presence of transapical costae gives the valves the appearance of having resolved striae. The costa density is 18 in 10 microns.

Original Description

Basionym: Nitzschia delognei
Author: Grunow in Van Heurck 1885
Length Range: µm
Striae in 10 µm:

Original Description

Original Images

Cite This Page:
Graeff, C. (2012). Simonsenia delognei. In Diatoms of the United States. Retrieved November 29, 2015, from

Species: Simonsenia delognei

Contributor: Carrie Graeff

Reviewer: Sarah Spaulding


Lange-Bertalot, H. (1979). Simonsenia, a new genus with morphology intermediate between Nitzschia and Surirella. Bacillaria 2: 127-136.

Van Heurck, H. (1885). Synopsis des Diatomées de Belgique. Texte. Martin Brouwers & Co., Anvers. p. 157. (description).

Links & ID's

Index Nominum Algarum (INA)

Transfer INA

California Academy of Sciences (CAS)

Simonsenia delognei CAS

North American Diatom Ecological Database (NADED)

NADED ID: 59001

Autecology Discussion