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Sellaphora moesta

(Temp. and H.Perag.) Ohtuska 2015      Category: Symmetrical biraphid
BASIONYM: Navicula americana var. moesta Temp. and H.Perag. 1908

Sellaphora meridionalis


Sellaphora nigri

LM scalebar = 10 µm = 20 pixels.


Contributor: David R.L. Burge | Mark Edlund - February 2017
Length Range: 57-131 µm
Width Range: 25-27 at the valve center, 29-30 at the widest µm
Striae in 10 µm: 16-17


Valves are weakly panduriform, with broadly rounded apices. The axial area is linear-lanceolate, expanding to a circular central area. The conopeum is large and extends transapically from the raphe branches to cover 1/2 of the valve face. The shape of the conopeum is also panduriform, narrowing at the apices and near the central area. however, the conopeum secondarily expands at the central area becoming circular in shape. The raphe is lateral with expanded, unilaterally deflected proximal ends. The distal raphe ends are externally hooked on the valve face in the same direction as the proximal ends and internally continue onto the face-mantle junction in the shape of a comma. Striae are parallel at the central area, becoming radiate at the apices. The areolae composing the striae occur 35-36 in 10 µm.

Original Description

Basionym: Navicula americana var. moesta
Author: Temp. and H.Perag. 1908
Length Range: µm
Striae in 10 µm:

Original Description

Grande forme à centre excavé et à area rugueuse dessinée par Wolle sous le nom de N. moesta A S., ce qui est évidemment une erreur, la forme de Schmidt étant un Diploneis. (Je n’ai pu trouver oú Wolle a pris son dessin.)

Original Images

Cite This Page:
Burge, D., and Edlund, M. (2017). Sellaphora moesta. In Diatoms of the United States. Retrieved May 23, 2018, from

Species: Sellaphora moesta

Contributor: David R.L. Burge | Mark Edlund

Reviewer: Marina Potapova


Burge, D.R.L. (2014). Relations of water quality, land use buffers, and diatom communities of connected depressions within the Cache River Watershed, Arkansas, USA. M.S. Thesis. Arkansas State University, Jonesboro, Arkansas. 141 pp.

Kihara, Y., Tsuda, K., Ishii, C., Ishizumi, E., and Ohtsuka, T. (2015). Periphytic diatoms of Nakaikemi Wetland, an ancient peaty low moor in central Japan. Diatom 31: 18–44.

Patrick, R.M. and Reimer, C.W. (1966). The Diatoms of the United States exclusive of Alaska and Hawaii, V. 1. Monographs of the Academy of Natural Sciences of Philadelphia 13.

Tempère, J. and Peragallo, H. (1907). Diatomées du Monde entier: Collection Tempère et Peragallo, 2nd edition. Text. Chez J. Tempère, villa Andrée-Lucie à Arcachon (Gironde). 480pp.

Links & ID's

Index Nominum Algarum (INA)

Transfer INA
Original INA

California Academy of Sciences (CAS)

Sellaphora moesta CAS

North American Diatom Ecological Database (NADED)


Autecology Discussion

This taxon was described from Massachusetts (Patrick and Reimer 1966). It was recently reported from wetlands of Arkansas (Burge 2014) and Japan (Kihara et al. 2015). The images shown on this page are from from lake sediment cores from Moody Lake, Chisago County, Minnesota.