Nupela carolina
Potapova and Clason in Potapova et al. 2003 Category: Symmetrical biraphid
BASIONYM: Nupela carolina Potapova and Clason 2003
LM scalebar = 10 µm = 80 pixels.
Observations
Contributor: Marina Potapova - October 2010
Length Range: 5-15 µm
Width Range: 2.4-4.4 µm
Striae in 10 µm: 42-54
Description
Valves elliptical-lanceolate. The smallest cells may become oval. Frustule slightly bent in girdle view. The distance between central raphe endings is slightly longer on the convex valve than on the concave valve. Terminal raphe fissure forming a curved opening to the primary side of the valve. Axial area linear, narrow. Central area square or lyre-shaped, formed by interrupted central striae, often with several isolated areolae, appearing convex under LM. Transapical striae radiate, 42-54 in 10 μm. Outer areolae openings are slightly transapically elongate, covered by hymenes lying flush with the valve surface. Inner openings of areolae are small, round or oval foramina.
Original Description
Basionym: Nupela carolina
Author: Potapova and Clason 2003
Length Range: 5-15 µm
Width Range: 2.4-4.4 µm
Striae in 10 µm: 42-54
Original Description
Valves elliptical-lanceolate, 5-15 μm long, 2.4-4.4 μm wide. The smallest cells may become oval. Frustule slightly bent in girdle view. The distance between central raphe endings is slightly longer on the convex valve than on the concave valve. Terminal raphe fissure forming a curved opening to the primary side of the valve. Axial area linear, narrow. Central area square or lyre-shaped, formed by interrupted central striae, often with several isolated areolae, appearing convex under LM. Transapical striae radiate, 42-54 in 10 μm. Outer areolae openings are slightly transapically elongate, covered by hymenes lying flush with the valve surface. Inner openings of areolae are small, round or oval foramina.
Original Images
Original text and images reproduced with permission by the author.
Cite This Page:
Potapova, M. (2010). Nupela carolina. In Diatoms of the United States. Retrieved May 22, 2013, from http://westerndiatoms.colorado.edu/taxa/species/nupela_carolina
Species: Nupela carolina
Contributor: Marina Potapova
Reviewer: Sarah Spaulding
Image Credit: Marina Potapova
- Raphe present on both valves
- Valves elliptical-lanceolate
- Striae unresolvable in LM
Valves elliptical-lanceolate. Raphe present on both valves. Axial area linear, narrow. Central area square or lyre-shaped, formed by interrupted central striae, often with several isolated areolae, appearing convex under LM. Transapical striae unresolvable in LM.
Compare
Nupela carolina differs from N. frezelii by smaller size, higher striae density and by having a raphe on both valves. Nupela neglecta can be distinguished from N. carolina by reduced raphe slits on one of the valves.
Nupela frezelii
Nupela neglecta
Citations
Potapova, M., Ponander, K.C., Lowe, R.L., Clason, T.A. and Bahls, L.L. (2003). Small-celled Nupela speces from North America. Diatom Research 18: 293-306.
Links & ID's
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
North American Diatom Ecological Database (NADED)
NADED ID: 92012