Schönfelder in Krammer 2000 Category: Symmetrical biraphid
BASIONYM: Pinnularia marchica Schönfelder ex Krammer 2000
REPORTED AS: Pinnularia microstauron (Krammer and Lange-Bertalot 1986)
Contributor: Marina Potapova - January 2012
Length Range: 11-20 µm
Width Range: 4-5 µm
Striae in 10 µm: 10-13
Valves are linear to elliptic-lanceolate, with rostrate apices (in most, but not all, specimens). The axial area is lanceolate, widening into a large central area that reaches the valve margins. The raphe is straight, with proximal ends bent slightly to one side. Striae are radiate near the valve center and slightly convergent near the apices.
Basionym: Pinnularia marchica
Author: Schönfelder ex Krammer 2000
Length Range: 22-37 µm
Width Range: 4.7-6.3 µm
Striae in 10 µm: 11-14
Krammer, K. (2000). The genus Pinnularia. The Diatoms of Europe. Diatoms of Inland Waters and Comparable Habitats 1: 1-703.