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
LM scalebar = 10 µm = 80 pixels.
Observations
Contributor: Pat Kociolek - March 2011
Length Range: 25-45 µm
Width Range: 9-11 µm
Striae in 10 µm: 8-10
Description
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 June 19, 2013, from http://westerndiatoms.colorado.edu/taxa/species/mastogloia_grevillei
Species: Mastogloia grevillei
Contributor: Pat Kociolek
Reviewer: Sarah Spaulding
Image Credit: Pat Kociolek
- Valve linear-lanceolate
- Raphe undulate
- Striae biseriate
Valve linear-lanceolate with apices protracted and rounded. The raphe is lateral, reverse lateral about midway from the apices to the central area. Striae are radiate and biseriate.
Compare
This diatom is distinctive and difficult to confuse with others. It differs from other Mastogloia species in freshwater by the undulate raphe and biseriate striae.
Citations
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)
California Academy of Sciences (CAS)
North American Diatom Ecological Database (NADED)
NADED ID: 43005