Sellaphora stauroneioides

(Lange-Bert.) Veselá and J.R.Johansen 2009      Category: Symmetrical biraphid
BASIONYM: Naviculadicta stauroneioides Lange-Bert. 1996

Sellaphora saugerresii


Sellaphora subfasciata

LM scalebar = 10 µm = 80 pixels.


Contributor: Ian Bishop - February 2016
Length Range: 22-31 µm
Width Range: 6.2-6.9 µm
Striae in 10 µm: 28-31 at mid-valve, unresolvable high density toward the apices


Valves are linear-lanceolate with a slight marginal inflation at mid-valve, and have protracted, narrow, rostrate to subcapitate apices. Axial area is linear and narrow. The central area is transversely oriented and rectangular to bow tie-shaped. Striae are dense and unobservable under LM, except at mid-valve, where they are radiate and curved. Raphe is filiform, with inflated, unilaterally deflected proximal ends.

It should be noted that at a later date Kulikovskiy et al. also transferred this taxon from Naviculadicta to Sellaphora (2010). This later homonym is superfluous and does not have priority.

Original Description

Basionym: Naviculadicta stauroneioides
Author: Lange-Bert. 1996
Length Range: 20-27 µm
Width Range: 5.5-6.5 µm
Striae in 10 µm: up to 35-40

Original Description

Navicula stauroneoides Lange-Bertalot nov. spec. Taf. 109: 22-27

Valvae lineari-elliptico-lanceolatae apicibus obtuse protractis polis plusminusve late rotundatis. Longitudo 20-27µm, latitudo 5,5-6,5µm. Rami raphis filiformes distincte unilateraliter curvatae poris centralibus distinctis. Area axialis angusta, area centralis transapicaliter late dilatata ad instar papilio similis, areae apicales parvae sed satis aspectabiles. Striae transapicales extra partes protractas valde radiantes, in partibus protractis abrupte valde convergentes, 35-40 in 10µm. Striae utrimque areae centralis graviter abbreviatae item breviter extra area una stria brevis vel duae striae breves intermissae sunt (in microscopo photonico) non aspectabiles itaque striae ibi minus dense positae apparentes.

Typus: Praep. Eu-SF 44 in Coll. Lange-Bertalot, Bot. Inst. der J. W. Goethe - Universität Frankfurt a. M. (Fig. 80: 21,22).

Locus typicus: Petäijä Lampi, oligo-dystropher See in Zentral-Finnland, leg. A. & R. Dorn, Juni 1992

Original Images

Cite This Page:
Bishop, I. (2016). Sellaphora stauroneioides. In Diatoms of the United States. Retrieved April 24, 2018, from

Species: Sellaphora stauroneioides

Contributor: Ian Bishop

Reviewer: Jana Veselá


Kulikovskiy, M.S., Lange-Bertalot, H., Witkowski, A., Dorofeyuk, N.I. and Genkal, S.I. (2010). Diatom assemblages from Sphagnum bogs of the world. I. Nur bog in northern Mongolia. Bibliotheca Diatomologica 55: 1-326.

Lange-Bertalot, H. and Metzeltin, D. (1996). Indicators of oligotrophy - 800 taxa representative of three ecologically distinct lake types, Carbonate buffered - Oligodystrophic - Weakly buffered soft water. Lange-Bertalot, H. (ed.), Iconographia Diatomologica. Annotated Diatom Micrographs. Vol. 2. Ecology, Diversity, Taxonomy. Koeltz Scientific Books. Königstein, Germany, 2:390 pp.

Veselá, J. and Johansen, J.R. (2009). The diatom flora of ephemeral headwater streams in the Elbsandsteingebirge region of the Czech Republic. Diatom Research 24(2): 443-477.

Links & ID's

Index Nominum Algarum (INA)

Transfer INA
Original INA

California Academy of Sciences (CAS)

Sellaphora stauroneioides CAS

North American Diatom Ecological Database (NADED)


Autecology Discussion

This taxon has been confirmed in samples collected from southeastern Piedmont region, from eastern Georgia up to central Virginia. It is also found farther west in relatively undisturbed lower order creeks in Mississippi and Arkansas.