Brebissonia lanceolata

(Agardh) Mahoney and Reimer 1986      Category: Asymmetrical biraphid
BASIONYM: Gomphonema lanceolatum Agardh 1831

Brachysira zellensis


Caloneis amphisbaena

LM scalebar = 10 µm = 40 pixels.


Contributor: Dan Bogan - June 2013
Length Range: 57.8-146.0 µm
Width Range: 16.6-25.8 µm
Striae in 10 µm: 10-12 in the valve center, 12-14 at the apices


Valves are lanceolate to lanceolate-elliptical with slightly protracted, broadly rounded to attenuate ends. Striae are parallel in the center becoming radiate toward the apices. The elongate central nodule results in a large gap between proximal raphe ends. Internally, helictoglossae are present at the raphe ends, at least 3 µm from valve apex. Apical pore fields are present.

Original Description

Basionym: Gomphonema lanceolatum
Author: Agardh 1831
Length Range: µm
Striae in 10 µm:

Original Description

Original Images

Cite This Page:
Bogan, D. (2013). Brebissonia lanceolata. In Diatoms of the United States. Retrieved October 09, 2015, from

Species: Brebissonia lanceolata

Contributor: Dan Bogan

Reviewer: Sam Rushforth


Agardh, C.A. (1831). Conspectus Criticus Diatomacearum. Part 3. Lundae. Litteris Berlingianis. pp. 33-48.

Mahoney, R.K. and Reimer, C.W. (1986). Studies on the genus Brebissonia (Bacillariophyceae). I. Introduction and observations de B. lanceolata comb. nov. In: M. Ricard, ed., Proceedings of the 8th International Diatom Symposium: Koeltz, Koenigstein: 183-190.

Potapova, M. (1996). Epilithic algal communities in rivers of the Kolyma Mountains, NE Siberia, Russia . Nova Hedwigia 63 (3-4): 309-334. 0029-5035/96/0063-0309

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Brebissonia lanceolata CAS

North American Diatom Ecological Database (NADED)


Autecology Discussion


Brebissonia lanceolata has been found in several wadeable streams in southwestern Alaska. The pH of these streams ranges from 6.9 to 7.9 with a mean of 7.3 and specific conductance ranges from 19 to 86 µS/cm with an average of 44 µS/cm. It has also been reported from streams and rivers in Eastern Siberia (Potapova 1996).

Credit/Source: Photo by Daniel Rinella