Valves are linear to linear-lanceolate, with parallel margins. The distal valve tapers abruptly to form slightly protracted to rounded apices. Fibulae are distinct, numbering 11-13 in 10 µm. Striae are parallel and finely punctate.
Kociolek, P. (2011). Nitzschia perminuta. In Diatoms of North America. Retrieved February 18, 2025, from https://diatoms.org/species/46776/nitzschia_perminuta