Encyonema appalachianum

Potapova 2014      Category: Asymmetrical biraphid

Ellerbeckia arenaria


Encyonema auerswaldii

LM scalebar = 10 µm = 80 pixels.


Contributor: Marina Potapova - December 2014
Length Range: 26-34 µm
Width Range: 6-7 µm
Striae in 10 µm: 9-10


Valves are linear-lanceolate, and only very slightly dorsiventral. The apices are rounded and slightly protracted. The raphe is lateral with sharply bent terminal fissures. The axial area is narrow and linear. The central area is formed by considerably a shortened stria on the ventral side and a very slightly shortened stria on dorsal side. Striae are parallel and mostly uniseriate, although occasionally some specimens are biseriate. Areolae are apically elongated, approximately 26 in 10 μm. Striae continue uninterrupted around the valve apices.

Original Description

Author: Potapova 2014
Length Range: 26-34 µm
Width Range: 6-7 µm
Striae in 10 µm: 9-10

Original Description

Original Images

Cite This Page:
Potapova, M. (2014). Encyonema appalachianum. In Diatoms of the United States. Retrieved April 23, 2018, from http://westerndiatoms.colorado.edu/taxa/species/encyonema_appalachianum

Species: Encyonema appalachianum

Contributor: Marina Potapova

Reviewer: Sarah Spaulding


Links & ID's

Index Nominum Algarum (INA)

California Academy of Sciences (CAS)

North American Diatom Ecological Database (NADED)


Autecology Discussion

Encyonema appalachianum so far has been found in several rivers and reservoirs in western Pennsylvania. These water bodies were circumneutral to alkaline and had a wide range of water mineral content.