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Sellaphora fusticulus

(Østrup) Lange-Bert. 2000      Category: Symmetrical biraphid
BASIONYM: Navicula fusticulus Østrup 1910
SYNONYM(S): Navicula laevissima f. fusticulus (Østrup) H.Kobayasi 1969 | Navicula wittrockii var. fusticulus (Østrup) A.Cleve 1953 | Navicula wittrockii f. fusticulus (Østrup) Hust. 1961 

Sellaphora californica


Sellaphora hohnii

LM scalebar = 10 µm = 80 pixels.


Contributor: David R.L. Burge | Mark Edlund - June 2017
Length Range: 29-46 µm
Width Range: 7-9 µm
Striae in 10 µm: 15-17 at the valve center, 18-20 at the apices


Valves are linear, with slightly convex margins. The apices are broadly rounded and weakly capitate. The axial area is narrow and linear. Canopea are not apparent in LM. The central area is elliptic to rounded, with shortened striae at the margins. The raphe is filiform to lateral. The proximal raphe ends are expanded and unilaterally deflected. The distal raphe ends hook onto the apices in the same direction as the proximal raphe deflection. The central striae are shortened and straight. The striae of the main body are radiate and weakly curved toward the valve margin, becoming more dense at the apices.

Sellaphora fusticulus is morphologically similar to S. laevissima, and has not been widely reported in the United States.

Original Description

Basionym: Navicula fusticulus
Author: Østrup 1910
Length Range: 64 µm
Width Range: 11 µm
Striae in 10 µm: 16

Original Description

Valva sublineari sub apices rotundas leniter contracta. Raphe area angusta hyalina, media in parte valvae in aream transapicalem subellipticaum dilatata, cincta. Nodulis terminalibus extremis in apicibus situatis. Striis usqve ad apices radiantibus.

J: Havstrup F.K. Ferskv. I denne Prove findes Nav. Fusticulus ogsaa mindre (Long.5) og noget stribet helt retlinet.

Original Images

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

Species: Sellaphora fusticulus

Contributor: David R.L. Burge | Mark Edlund

Reviewer: Marina Potapova


Lange-Bertalot, H., Cavacini, P., Tagliaventi, N. and Alfinito, S. (2003). Diatoms of Sardinia: Rare and 76 new species in rock pools and other ephemeral waters. Iconographia Diatomologica 12, 438 pp.

Østrup, E. (1910). Danske Diatoméer. C.A. Reitzels Boghandel, Kjøbenhavn. 323 pp., 5 pls.

Rumrich, U., Lange-Bertalot, H. and Rumrich, M. (2000). Diatoms of the Andes. From Venezuela to Patagonia/Tierra del Fuego and two additional contributions. Lange-Bertalot, H. (ed.), Iconographia Diatomologica. Annotated Diatom Micrographs. Vol. 9. Phytogeography-Diversity-Taxonomy. Koeltz Scientific Books, Königstein, Germany, 9:673 pp.

Links & ID's

Index Nominum Algarum (INA)

Original INA
Transfer INA

California Academy of Sciences (CAS)

Sellaphora fusticulus CAS

North American Diatom Ecological Database (NADED)

NADED ID: 170026

Autecology Discussion

Sellaphora fusticulus is morphologically similar to S. laevissima, and has not been widely reported in the United States. Here we show specimens from a eutrophic lake in east-central Minnesota. Specimens have also been observed in a New England river from a U.S. Geological Survey regional stream survey.


The distribution of Sellaphora fusticulus in rivers of the United States. Accessed on 10 July, 2017.

Credit/Source: USGS/Biodata