- Valve is organized around a line (bilateral symmetry)
- Raphid system extremely well developed, and positioned around the entire 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 |
|---|---|---|---|
| Surirella angusta var. constricta | 268 |
