| Name | Nitzschia obtusa W. Smith |
| Authorship | W. Smith ter |
| Rank | Species |
| Placed in | Nitzschia Hassall |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Nitzschia obtusa W. Smith |
| Identification made in | [no date] (1) |
| Name | Nitzschia obtusa W. Smith |
| Authorship | W. Smith ter |
| Rank | Species |
| Placed in | Nitzschia Hassall |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Nitzschia obtusa W. Smith |
| Identification made in | [no date] (1) |