- Valve is organized around a line (bilateral symmetry)
- Valves usually symmetrical to both apical and transapical axes
- Raphid system well developed, and positioned near the valve margin
- Raphe is enclosed within a canal and raised onto a keel
Note: The specimen(s) pictured to the right are not from Antarctica, excepting Naviculoid example.
| Taxon Name | Basionym | synonyms | ID |
|---|---|---|---|
| Hantzschia abundans | 30 | ||
| Hantzschia amphioxys | Eunotia amphioxys | 29 | |
| Hantzschia amphioxys f. muelleri | Hantzschia amphioxys f. capitata | 33 | |
| Hantzschia sp. #5 | 66 | ||
| Hantzschia subrupestris | Hantzschia amphioxs var. ruperstris f. capitellata | Hantzschia amphioxs var. ruperstris f. rostrata | 32 |
| Nitzschia westii | Fragilaria tenuicollis var. antarctica | Nitzschia westii | 70 |
