Thalassiosiropsis wittiana (Pantocsek) Hasle in Hasle & Syvertsen (1985)
Comment: Large, partly damaged valve. Note the valve face undulations, and the small central depression hosting a so-called multistrutted process .
Locality: Eidsbotn Fjord, Devon Island, Nunavut, Canada, sample: EF0103 (Late Cretaceous).
Photographed using: Zeiss Axio.A1, Plan-APOCHROMAT 100×/1.4 Oil DIC + Zeiss AxioCam ICc 5. Stacked using Helicon Focus.
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