Mastogloia smithii
Thwaites 1856 Category: Symmetrical biraphid
BASIONYM: Mastogloia smithii Thwaites 1856
LM scalebar = 10 µm = 80 pixels.
Observations
Contributor: Pat Kociolek - March 2011
Length Range: 33-46 µm
Width Range: 11-13 µm
Striae in 10 µm: 15-18
Description
Valves are elliptic-lanceolate with mostly convex sides and protracted, broadly rounded apices. The axial area is narrow, straight, and expanded into an asymmetric, elliptic to irregularly rectangular central area. The raphe is filiform, but becomes lateral at about ½ from the apices to the center. External proximal raphe ends are dilated slightly and rounded. Striae are radiate and distinctly punctate.
Valvocopulae with locules that are rectangular to irregularly-shaped chamber, present in the middle section of the band. Locules number 6-9 in 10 µm. This taxon is found in alkaline, usually standing, waters.
Original Description
Basionym: Mastogloia smithii
Author: Thwaites 1856
Length Range: µm
Striae in 10 µm:
Original Description
Original Images
Cite This Page:
Kociolek, P. (2011). Mastogloia smithii. In Diatoms of the United States. Retrieved June 19, 2013, from http://westerndiatoms.colorado.edu/taxa/species/mastogloia_smithii
Species: Mastogloia smithii
Contributor: Pat Kociolek
Reviewer: Sarah Spaulding
Image Credit: Pat Kociolek
- Valves elliptical-lanceolate
- Protracted apices
- Valvocopulae with locules
- Striae 15-18 in 10 µm
Valves elliptic-lanceolate with protracted, broadly rounded apices. The raphe is filiform, becoming lateral at about ½ from the apices to the center. Striae are radiate and distinctly punctate.
Compare
Distinguished from Aneumastus pseudotusculus in the finer striae, smaller valves and the presence of locules.
Aneumastus pseudotusculus
Citations
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: 43002