Eunotia orthohedra

Furey, Lowe and Johansen 2011      Category: Eunotioid
BASIONYM: Eunotia orthohedra Furey, Lowe and Johansen 2011

Eunotia obliquestriata

 

Eunotia paludosa

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: Paula Furey - February 2011
Length Range: 12-19 µm
Width Range: 2.7-3.8 µm
Striae in 10 µm: 16-20 in the valve center, 20-22 at the ends

Description

The ventral margin is slightly concave and has subapical swellings at the proximal raphe ends. The dorsal margin is flattened with angular shoulders subtending the apices. Valves are narrow, 4.2 – 6.0 times longer than wide. The apices are capitate, dorsally recurved, and rounded. Helictoglossae are not visible in the LM. One apical rimoportula. The raphe is short and curves on to the valve face. The striae are radiate and may be faint in appearance. The areolae are unresolved in the LM.



Original Description

Basionym: Eunotia orthohedra
Author: Furey, Lowe and Johansen 2011
Length Range: 12-19 µm
Width Range: 2.7-3.8 µm
Striae in 10 µm: 16-20 in the center valve, 20-22 at the ends.

Original Description

Valves slightly concave with subapical swellings on the ventral margin at the proximal raphe ends, flattened on the dorsal margin with angular shoulders subtending the apices, narrow, 4.2 – 6.0 times longer than wide, 12 – 19 μm long, 2.7 – 3.8 μm wide. Apices capitate, dorsally recurved, rounded. Helictoglossae not visible in the light microscope. Rimoportula at one end. Raphe short, curved on to valve face. Striae indistinct, radiate, 16 – 20 in 10 μm at the center of the valve, 20 – 22 in 10 μm near the ends. Puncta unresolved in light microscope.

Original Images


Cite This Page:
Furey, P. (2011). Eunotia orthohedra. In Diatoms of the United States. Retrieved November 26, 2014, from http://westerndiatoms.colorado.edu/taxa/species/eunotia_orthohedra

Species: Eunotia orthohedra

Contributor: Paula Furey

Reviewer: Marina Potapova

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 orthohedra is epilithic and epiphytic on bryophytes in wet walls, creeks, and waterfalls.