Sellaphora pulchra

Enache and Potapova 2009      Category: Symmetrical biraphid
BASIONYM: Sellaphora pulchra Enache and Potapova 2009

Sellaphora meridionalis

 

Sellaphora rexii

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: Marina Potapova - February 2013
Length Range: 7.6-13.3 µm
Width Range: 3.3-4.0 µm
Striae in 10 µm: 30-40 around central area, 35-45 from mid-valve to apices

Description

Valves are elliptic-lanceolate with sub-capitate to capitate ends. The axial area is narrow and straight. The central area is bow-tie shaped, bordered by alternating short and long striae. The striae are uniseriate and strongly radiate in mid-valve, becoming parallel or slightly convergent at the valve ends. Striae are not resolvable under LM, with the exception of a few central striae that may be visible in some specimens. The areolae are small, rounded and number 60-100 in 10 µm. The raphe is straight and filiform, with simple proximal ends. The proximal ends are only slightly expanded; the terminal fissures are curved toward the secondary side of the valve. Polar bars are indistinct, or very slightly developed.



Original Description

Basionym: Sellaphora pulchra
Author: Enache and Potapova 2009
Length Range: 7.6-13.3 µm
Width Range: 3.3-4.0 µm
Striae in 10 µm:

Original Description

Description: Valves elliptic-lanceolate with sub-capitate to capitate ends, 7.6-13.3 µm long and 3.3-4.0 µm wide. Axial area narrow and straight. Central area bow-tie-shaped with alternating short and long striae. Transapical striae uniseriate and strongly radiate in mid-valve, becoming parallel or slightly convergent at valve ends, 30-40 in 10 µm around central area, 35-45 in 10 µm from mid-valve to apices. Areolae small, rounded, 60-100 in 10 µm transapically. Striae irresolvable under LM. Raphe straight, filiform, with simple central endings, only slightly expanded, and terminal fissures curved towards secondary side of the valve. A fold can be observed at the junction of the valve face and the mantle. Polar bars indistinct or very slightly developed.

Original Images


Cite This Page:
Potapova, M. (2013). Sellaphora pulchra . In Diatoms of the United States. Retrieved October 31, 2014, from http://westerndiatoms.colorado.edu/taxa/species/sellaphora_pulchra

Species: Sellaphora pulchra

Contributor: Marina Potapova

Reviewer: Sam Rushforth

Citations

Enache, M.D. and Potapova, M. (2009). A new species of Sellaphora (Sellaphoraceae) from Hannaberry Lake, Arkansas, USA. Acta Botanica Croatica 68(2):231-237 .

Links & ID's

Index Nominum Algarum (INA)

California Academy of Sciences (CAS)

Sellaphora pulchra CAS

North American Diatom Ecological Database (NADED)

NADED ID:

Autecology Discussion