Valves are lanceolate, slightly constricted in the central area with narrowly rounded apices (apical raphe curvature obvious).
Valves measure from 25 - 35 µm in length (long) and 4.5 - 5.5 µm in width (wide).
The striae transverse and slightly coarser (rough) than in the preceding species, there are about 19 in 10 there are µm.
Found on the marine intertidal area of South Africa.
* Information compiled by Mr Pumlile Cotiyane
Cox, E. J. 1999 Craspedostauros gen. nov., a new diatom genus for some unusual marine raphid species previously placed in Stauroneis Ehrenberg and Stauronella Mereschkowsky.34:131-147
Kociolek, J. P.; Balasubramanian, K.; Blanco, S.; Coste, M.; Ector, L.; et al. 2019 DiatomBase. Achnanthes yaquinensis McIntire & Reimer, 1974. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=621484 on 2019-03-12