These diatoms typically have elongated, linear valves that may be straight or slightly curved. They exhibit fine, parallel striae running along the valve surface and vary in size, ranging from small to relatively large cells. The apices of the valves can be rounded, capitate (head-like), or attenuated (tapered). The central area of the valve shows variability in structure and markings across different species. Nitzschia diatoms are widespread in aquatic habitats, playing important roles in ecological processes such as primary production and nutrient cycling. For detailed information on specific species within this morphotype, further consultation of specialized taxonomic literature or databases is recommended.