Sheshukovia castellata (West) Gleser (1984)
Comment: A massive specimen in valve view, probably representing a variety within Sh. castellata that was originally proposed as Triceratium fractum Walker & Chase.
Locality: Deep Sea Drilling Project Hole 281 (South Tasman Rise, southwest Pacific), sample: 29-281-15CC (Eocene-Oligocene Transition).
Photographed using: Zeiss Axio.A1, Plan-APOCHROMAT 100×/1.4 Oil DIC + Zeiss AxioCam ICc 5. Stacked using Helicon Focus.
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