Visit us at diatoms.org

Diatoms of the United States is now known as Diatoms of North America.
This site has been redesigned and updated, and will be closing soon.

Nupela frezelii

Potapova 2011      Category: Symmetrical biraphid

Nupela fennica

 

Nupela impexiformis

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: Marina Potapova - October 2010
Length Range: 10-29 µm
Width Range: 3.8-6.3 µm
Striae in 10 µm: 29-33

Description

Valves are lanceolate to linear-elliptic with rounded to slightly drawn-out ends. Striae are radiate. Axial area is rhombic-lanceolate. Central area is asymmetric, reaching valve margin on one side of the valve. The raphe is absent on one of the valves. The raphe has a double-curved external slit and straight internal slit. External proximal raphe ends are simple or slightly expanded, internal proximal raphe slits are T-shaped.



Original Description

Basionym:
Author: Potapova 2011
Length Range: 10-29 µm
Width Range: 3.8-6.3 µm
Striae in 10 µm: 29-33

Original Description

Valves lanceolate to linear-elliptical with rounded to slightly drawn-out ends, 3.8–6.3μm wide, 10– 29μm long. Striae radiate, 29–33 in 10μm. Axial area rhombic-lanceolate. Central area asymmetrical, reaching the valve margin on one side of the valve. The raphe absent on one of the valves. The raphe with double-curved external slit and straight internal slit. External proximal raphe ends simple or slightly expanded, internal proximal raphe slits T-shaped. Terminal raphe fissures deflected towards secondary side of the valve.

Original Images


Cite This Page:
Potapova, M. (2010). Nupela frezelii. In Diatoms of the United States. Retrieved May 26, 2018, from http://westerndiatoms.colorado.edu/taxa/species/nupela_frezelii

Species: Nupela frezelii

Contributor: Marina Potapova

Reviewer: Sarah Spaulding

Citations

Potapova, M. (2011). New species and combinations in the genus Nupela from the USA. Diatom Research. 10.1080/0269249X.2011.575111

Links & ID's

Index Nominum Algarum (INA)

California Academy of Sciences (CAS)

North American Diatom Ecological Database (NADED)

NADED ID:

Autecology Discussion