LM scalebar = 10 µm = 80 pixels.
Observations
Contributor: Paula Furey - March 2011
Length Range: 15-19 µm
Width Range: 2.4-2.6 µm
Striae in 10 µm: 23-24 in the center valve, 24-25 at the ends
Description
Eunotia enischna valves are small and slender. The ventral margin is concave, and the dorsal margin is convex. The apices are defined by a marked change in slope on the dorsal margin. The apices are capitate, rounded, and dorsally recurved. The raphe is short and curves on to the valve face. Striae are indistinct and radiate. The areolae are unresolved in the LM.
Original Description
Basionym:
Author: Furey, Lowe and Johansen 2011
Length Range: 15-19 µm
Width Range: 2.4-2.6 µm
Striae in 10 µm: 23-24 in the center valve, 24-25 at the ends
Original Description
Valves slender, concave on the ventral margin, convex on the dorsal margin, with apices defined by a marked change in slope on the dorsal margin, 15 – 19 μm long, 2.4 – 2.6 μm wide. Apices capitate, rounded, dorsally recurved. Helictoglossae not visible in the light microscope. Rimoportula at one end of valve. Raphe short, curved on to valve face. Striae indistinct, radiate, 23 – 24 in 10 μm at the center of the valve, 24 – 25 in 10 μm near the ends. Puncta unresolved in the LM.
Original Images
Cite This Page:
Furey, P. (2011). Eunotia enischna. In Diatoms of the United States. Retrieved April 19, 2018, from http://westerndiatoms.colorado.edu/taxa/species/eunotia_enischna
Species: Eunotia enischna
Contributor: Paula Furey
Reviewer: Rex Lowe
Image Credit: Paula Furey
- Ventral margin concave
- Dorsal margin convex
- Apices capitate
- Striae indistinct, radiate
- Raphe short
Eunotia enischna valves are small and slender. The ventral margin is concave and the dorsal margin is convex. The apices are defined by a marked change in slope on the dorsal margin. The apices are capitate, rounded and dorsally recurved. The striae of E. enischna are radiate and very faint, even though the striae density is not high. The aerolae can not be resolved in the LM. The raphe is short and curves on to the valve face.
Compare
Eunotia enischna is considered to be a member of the E. exigua complex. Eunotia enischna is most similar to E. tenella but E. enischna are more finely striated, more slender, and have more distinctly recurved ends than E. tenella. Valves of E. enischna are more narrow and less distinctly constricted near the apices than the valves of E. exigua sensu stricto. Furthermore, the ventral margin of E. enishna is not as concave as the ventral margin of E. exigua.
Eunotia exigua
Eunotia tenella
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
Eunotia enischna has been found on waterfalls and wetwalls in the Great Smoky Mountains National Park.