(W. Smith) Lange-Bertalot 1980 Category: Araphid
BASIONYM: Synedra tenera W. Smith 1856
Valves are narrow and lanceolate, with attenuated, capitate apices. The mid-valve has convex margins. In girdle view, frustules are somewhat rectangular and wider at mid-valve. The axial area is lanceolate and in some specimens a distinct fascia is present in the central area. Striae are distinct, but areolae are resolvable under LM. Striae are parallel throughout the valve and extend midway onto the valve mantle. Costae are wider than the striae.
Basionym: Synedra tenera
Author: W. Smith 1856
Length Range: µm
Striae in 10 µm:
Lange-Bertalot, H. (1980). Zur systematischen Bewertung der bandförmigen Kolonien bei Navicula und Fragilaria. Kriterien für die Vereinigung von Synedra (subgen. Synedra) Ehrenberg mit Fragilaria Lyngbye. Nova Hedwigia 33: 723-787.
Smith, W. (1856). Synopsis of British Diatomaceae. John Van Voorst, London 1856. 2: 107pp., pls. 32-60, 61-62, A-E.
Cells may form small colonies, joined by linking spines.