| Name | Nitzschia lanceolata var. incrustans (Grunow) Grunow |
| Authorship | (Grunow) Grunow |
| Rank | Variety |
| Placed in | Nitzschia lanceolata W. Smith |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Nitzschia lanceolata var. incrustans (Grunow) Grunow |
| Identification made in | [no date] (1) |