Thalassiosira weissflogii
(Grunow) Fryxell and Hasle 1977 Category: Centric
BASIONYM: Micropodiscus weissflogii Grunow in Van Heurck 1880
SYNONYM(S): Eupodiscus weissflogii Grunow in Van Heurck 1882-1885 | Conticribra weissflogii (Grunow) Stachura-Suchoples and Williams 2009
LM scalebar = 10 µm = 80 pixels.
Observations
Contributor: Pat Kociolek - March 2011
Length Range: 10-20 µm
Striae in 10 µm:
Description
Valves are round, flat, with short mantles. The frustules are relatively lightly silicified. Areolae are fine and details of their structure are not visible with the light microscope. A ring of marginal fultoportulae, with small external openings, are present. Three to six central fultoportulae are present near the center of the valve face. A single, prominent rimoportula is present on the margin of the valve.
Original Description
Basionym: Micropodiscus weissflogii
Author: Grunow in Van Heurck 1880
Length Range: µm
Striae in 10 µm:
Original Description
Original Images
Cite This Page:
Kociolek, P. (2011). Thalassiosira weissflogii. In Diatoms of the United States. Retrieved June 18, 2013, from http://westerndiatoms.colorado.edu/taxa/species/thalassiosira_weissflogii
Species: Thalassiosira weissflogii
Contributor: Pat Kociolek
Reviewer: Sam Rushforth
Image Credit: Pat Kociolek
- Valves flat
- Areolae fine
- Prominent rimoportula on valve margin
Valves are flat, with short mantles. Areolae are fine. A single, prominent rimoportula is present on the valve margin.
Compare
This species is distinguished from Thalassiosira lacustris by finer striae, flat valve face, distinct marginal fultoportulae and a single, large rimoportula.
Thalassiosira lacustris
Citations
Hasle, G.R. and Fryxell, G.A. (1977). The genus Thalassiosira: some species with a linear areola array. In: R. Simonsen (ed.), Proceedings of the Fourth Symposium on Recent and Fossil Marine Diatoms, Oslo, 1976. Beihefte zur Nova Hedwigia 54:15-66.
Stachura-Suchoples, K. and Williams, D.M. (2009). Description of Conticribra tricircularis, a new genus and species of Thalassiosirales, with a discussion on its relationship to other continuous cribra species of Thalassiosira Cleve (Bacillariophyta) and its freshwater origin. European Journal of Phycology, 44(4): 477-486. 10.1080/09670260903225431
Links & ID's
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
NCBI Genbank Taxonomy
Thalassiosira weissflogii NCBI
North American Diatom Ecological Database (NADED)
NADED ID: 70008
Autecology Discussion
Thalassiosira weissflogii is a planktonic diatom which commonly forms chains widely spaced chains during vegetative growth.