Eunotia rushforthii
Furey, Lowe and Johansen 2011 Category: Eunotioid
BASIONYM: Eunotia rushforthii Furey, Lowe and Johansen 2011
LM scalebar = 10 µm = 80 pixels.
Observations
Contributor: Paula Furey - March 2011
Length Range: 14-26 µm
Width Range: 2.7-3.6 µm
Striae in 10 µm: 19-20
Description
The ventral margin is only slightly concave to nearly straight. The dorsal margin is convex, with one hardly-visible central swelling. The apices are acutely rounded and very slightly delimited from the rest of the valve. The helictoglossae are not visible in the LM. The raphe curves on to the valve face. The striae are slightly radiate. The areolae are unresolved in the LM.
Original Description
Basionym: Eunotia rushforthii
Author: Furey, Lowe and Johansen 2011
Length Range: 14-26 µm
Width Range: 2.7-3.6 µm
Striae in 10 µm: 19-20
Original Description
Original Description: Valves only slightly concave to nearly straight on ventral margin, convex on dorsal margin, with a hardly-visible central swelling, with apices scarcely delimited from the rest of the valve, 14 – 26 μm long, 2.7 – 3.6 μm wide. Apices acutely rounded. Helictoglossae not visible in the light microscope. Rimoportula at one end of valve. Raphe curved on to the valve face. Striae slightly radiate, 19 – 20 in 10 μm. Puncta unresolved in the light microscope.
Original Images
Cite This Page:
Furey, P. (2011). Eunotia rushforthii. In Diatoms of the United States. Retrieved June 19, 2013, from http://westerndiatoms.colorado.edu/taxa/species/eunotia_rushforthii
Species: Eunotia rushforthii
Contributor: Paula Furey
Reviewer: Rex Lowe
Image Credit: Paula Furey
- Ventral margin slightly concave to nearly straight
- Dorsal margin with faint swelling
- Apices acutely rounded
- Raphe curves onto valve face
- Striae slightly radiate
E. rushforthii valves have a slightly concave to nearly straight ventral margin. The dorsal margin is convex with a very slight central swelling. The apices are acutely rounded and very slightly delimited from the rest of the valve. The raphe curves onto the valve face. Striae are slightly radiate.
Compare
The morphology of E. rushforthii is most similar to E. trinacria. The dorsal margin of both species has a faint undulation, but E. rushforthii is markedly wider. Eunotia microcephala also has a small undulation on the dorsal margin but the undulation is more pronounced in E. microcephala than the faint undulation on E. rushforthii.
Eunotia microcephala
Krasske
Eunotia trinacria
Krasske
Citations
Furey, P.C., Lowe, R.L. and Johansen, J.R. (2011). Eunotia Ehrenberg (Bacillariophyta) of the Great Smoky Mountains National Park, USA. Bibliotheca Diatomologica 56: 1-134.
Links & ID's
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
North American Diatom Ecological Database (NADED)
NADED ID:
Autecology Discussion
To date E. rushforthii has been found in low densities, epiphytic on bryophytes in first through fifth order streams in the Great Smoky Mountains National Park.