This genus posesses a raphe and has sigmoid valves. The valve face can be flat, curved, or slightly angled at the raphe.
This genus is usually epipelic but occasionally planktonic. It inhabits marine and brackish environments.
| Abundance: | Distribution: |
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This genus posesses a raphe and has sigmoid
valves. The valve face can be flat, curved,
or slightly angled at the raphe.
This genus is usually epipelic
but occasionally planktonic. It inhabits marine
and brackish environments.