Asteromphalus oligocenicus Schrader & Fenner (1976)
Comment: A moderately well-preserved valve with parts of the margin missing.
Locality: Ocean Drilling Program Hole 699A (Northeast Georgia Rise, south Atlantic), sample: 114-699A-20H-3, 105-107 cm (early Oligocene).
Photographed using: Zeiss Axio.A1, Plan-APOCHROMAT 100×/1.4 Oil DIC + Zeiss AxioCam ICc 5. Stacked using Helicon Focus.
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