Nitzschia frustulum perpusilla
Nitzschia frustulum var. perpusilla
Nitzschia frustulum var. oblonga
Nitzschia frustulum var. minuta
Nitzschia frustulum var. acuta
Nitzschia frustulum var. obtusa
Nitzschia frustulum f. constricta
Nitzschia frustulum var. asiatica
Nitzschia frustulum var. subserians
Nitzschia frustulum var. symbioticum
Nitzschia frustulum var. indica
Nitzschia frustulum var. capitata
Nitzschia frustulum var. recurvata
Nitzschia frustulum var. salinarum
Nitzschia frustulum var. minutula
Nitzschia frustulum var. subsalina
Nitzschia frustulum var. tenella