Eunotia cataractarum

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

Eunotia canicula

 

Eunotia diadema

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: Paula Furey - February 2011
Length Range: 11-21 µm
Width Range: 3.1-3.9 µm
Striae in 10 µm: 15-20 in the center valve, 16-19 at the ends, puncta 44-50

Description

Valves are concave on the ventral margin, sometimes with scarcely visible swellings on the ventral margin, marking the position of the proximal raphe ends. Valves have a slightly convex, flattened dorsal margin. The apices are set off dorsally by a fairly steep sloping shoulder. Apices are capitate and rounded. Helictoglossae are not visible in the LM. One apical rimoportula at the center of the apex, with a distinct external pore (visible in SEM). Striae are parallel to slightly radiate.



Original Description

Basionym: Eunotia cataractarum
Author: Furey, Lowe and Johansen 2011
Length Range: 11-21 µm
Width Range: 3.1-3.9 µm
Striae in 10 µm: 15-20 in the center valve, 16-19 at the ends, puncta 44-50

Original Description

Valves concave on the ventral margin, sometimes with scarcely visible swellings marking the position of the proximal raphe ends. Slightly convex flattened dorsal margin, with apices set off dorsally by a fairly steep sloping shoulder. Apices capitate, rounded. Helictoglossae not visible in the light microscope. Rimoportula at one end of valve, at the center of the apex, with a distinct external pore. Striae parallel to slightly radiate, 15 – 20 in 10 μm in the valve center, 16 – 19 in 10 μm at the apices. Puncta 44 – 50 in 10 μm.

Original Images


Cite This Page:
Furey, P. (2011). Eunotia cataractarum. In Diatoms of the United States. Retrieved September 01, 2014, from http://westerndiatoms.colorado.edu/taxa/species/eunotia_cataractarum

Species: Eunotia cataractarum

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 cataractarum is commonly found in the epilithon or epiphytic on bryophytes at waterfalls, and occasionally in streams in the Great Smoky Mountains National Park.