Diatoma tenuis
Agardh 1812 Category: Araphid
SYNONYM(S): Diatoma elongatum var. tenuis (Agardh) Van Heurck
REPORTED AS: Diatoma tenue var. elongatum (Patrick and Reimer 1966)
LM scalebar = 10 µm = 40 pixels.
Observations
Contributor: Marina Potapova - July 2010
Length Range: 20-85 µm
Width Range: 2.9-4.9 µm
Striae in 10 µm: 45-60
Description
Cells form zig-zag colonies. Frustules are biconcave in girdle view. In valve view, valves are linear with capitate apices. Valves at the smaller end of the size range have rostrate or subrostrate apices. Transapical ribs number 6-11 in 10 µm. Striae are uniseriate, but not visible under LM. Axial area is linear and very narrow. A rimportula is positioned within in a transapical rib or between ribs at one apex. Apical pore fields are present at both apices.
Original Description
Basionym:
Author: Agardh 1812
Length Range: µm
Striae in 10 µm:
Original Description
Diatoma Tenuis, filis decumbentibus linearibus fusco-luteis, articulis post copulationem alternatim solutis. Habitat in foliis dejectis aquaque submersis, ut in rivulo Luci Foglesång prope Ludam, unde inter alias algas apportavit amic. Ph. Doct. Bruzelius.
Original Images
Cite This Page:
Potapova, M. (2010). Diatoma tenuis. In Diatoms of the United States. Retrieved May 24, 2013, from http://westerndiatoms.colorado.edu/taxa/species/diatoma_tenuis
Species: Diatoma tenuis
Contributor: Marina Potapova
Reviewer: Rex Lowe
Image Credit: Marina Potapova
- Valves linear with capitate ends
- Valves usually 3-4.5 µm wide
- Transapical ribs 6-11 in 10 µm
Valves are linear with capitate apices. Transapical ribs number 6-11 in 10 µm. Striae are not distinguishable under LM. One rimoportula is positioned at one valve apex.
Compare
Diatoma tenuis differs from D. moniliformis by its linear valves with capitate apices.
Diatoma moniliformis
Citations
Agardh, C.A. (1812). Dispositio Algarum Suecae. Litteris Berlingianis, Lundae. 45 pp.
Krammer, K. and Lange-Bertalot, H. (1991). Bacillariophyceae. 3. Teil: Centrales, Fragilariaceae, Eunotiaceae. . In Ettl, H., Gerloff, J., Heynig, H. & Mollenhauer, D. (Eds.). Süsswasserflora von Mitteleuropa. 2(3): 1-576. Gustav Fisher Verlag, Stuttgart, Germany.
Patrick, R.M. and Reimer, C.W. (1966). The Diatoms of the United States exclusive of Alaska and Hawaii, V. 1. Monographs of the Academy of Natural Sciences of Philadelphia 13.
Snoeijs, P. and Potapova, M. (1998). Ecotypes or endemic species? A hypothesis on the evolution of Diatoma taxa (Bacillariophyta) in the northern Baltic Sea. Nova Hedwigia 67: 303-348.
Links & ID's
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
North American Diatom Ecological Database (NADED)
NADED ID: 27012