Contributor: Jonathan English -
Length Range: 8-19 µm
Width Range: 5-8 µm
Striae in 10 µm: Fibulae 8-10
The small, heteropolar valves are 8-19 μm in length by 5-8 μm in width. The headpole is broadly rounded while the footpole is cuneately rounded. The fibulae are broad and short with 8-10 in 10 μm. The costae and central line are not visible in the LM.
Basionym: Surirella atomus
Author: Hustedt 1955
Length Range: 12 µm
Width Range: 6 µm
Striae in 10 µm:
Valves oval with distinct alae, about 12 µ long, 6 µ broad. Alar canals about 6 in 10 µ, cell wall very slightly undulate in the marginal zone only. Structure very delicate and inconspicuous.
Hustedt, F. (1955). Marine littoral diatoms of Beaufort, North Carolina. Marine Station Bulletin 6:67 pp., 16 pls.