Costopyxis antiqua Gleser (1984)
Comment: A well-preserved valve with three processes projecting from the summit, and parts of the interior visible.
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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