Mastogloia grevillei

W. Smith 1856      Category: Symmetrical biraphid
BASIONYM: Mastogloia grevillei W. Smith in Gregory 1856
SYNONYM(S): Mastogloia smithii var. grevillei (W. Smith) Brun 1880 

Mastogloia elliptica


Mastogloia lacustris

LM scalebar = 10 µm = 80 pixels.


Contributor: Pat Kociolek - March 2011
Length Range: 25-45 µm
Width Range: 9-11 µm
Striae in 10 µm: 8-10


Valves are linear-lanceolate with straight margins and protracted and rounded apices. The axial area is narrow at the apices, slightly wider until reaching the rounded central area. The raphe is lateral, reverse lateral about midway from the apices to the central area. The external proximal raphe ends are dilated slightly. Striae are radiate and composed of two rows of areolas arranged in quincunx.

Found in alkaline freshwaters across the US.

Original Description

Basionym: Mastogloia grevillei
Author: W. Smith in Gregory 1856
Length Range: µm
Striae in 10 µm:

Original Description

Original Images

Cite This Page:
Kociolek, P. (2011). Mastogloia grevillei. In Diatoms of the United States. Retrieved August 31, 2016, from

Species: Mastogloia grevillei

Contributor: Pat Kociolek

Reviewer: Sarah Spaulding


Gregory, W. (1856). Notice of some new species of British Fresh-water Diatomaceae. Quarterly Journal of Microscopical Science, new series, London 4:1-14, pl. I.

Smith, W. (1856). Synopsis of British Diatomaceae. John Van Voorst, London 1856. 2: 107pp., pls. 32-60, 61-62, A-E.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Mastogloia grevillei CAS

North American Diatom Ecological Database (NADED)

NADED ID: 43005

Autecology Discussion