(Reimer) Potapova 2012 Category: Monoraphid
BASIONYM: Achnanthes lanceolata var. abbreviata Reimer 1966
Contributor: Marina Potapova - November 2011
Length Range: 11-18 µm
Width Range: 6.1-8.5 µm
Striae in 10 µm: 11-12
Valves are elliptic-lanceolate with subrostrate apices. The raphe valve has a transversely rectangular to elliptic central area. The rapheless valve has a wide rhomboid axial area and asymmetric central area that contains a hood on the internal valve surface. The raphe is straight with expanded external proximal ends. The multiseriate striae are radiate on both valves.
Basionym: Achnanthes lanceolata var. abbreviata
Author: Reimer 1966
Length Range: 11-26 µm
Width Range: 6-8.5 µm
Striae in 10 µm: 10-12
Pseudoraphe valve with shortened striae forming a broad, lanceolate pseudoraphe. Other features as in the nominate variety. Length 11-26 µ. Breadth 6-8.5 µ. Striae 10-12 in 10 µ.
Potapova, M. (2012). New species and combinations in monoraphid diatoms (Family Achnanthidiaceae) from North America. Diatom Research 27(1): 29-42. doi:10.1080/0269249X.2011.644636
Reimer, C.W. (1966). Consideration of fifteen diatom taxa (Bacillariophyta) from the Savannah River, including seven described as new. Notulae Naturae (Academy of Natural Sciences of Philadelphia) 397:1-15.