Actinoptychus pericavatus Brun (1891)
Comment: This species is distinguished by the small spherical elevations and depressions present next to the valve margin.
Locality:
Deep Sea Drilling Project Hole 402A (Bay of Biscay, northeast Atlantic), sample: 48-402A-4R-2, 70-71 cm (middle Eocene).
Photographed using: Zeiss Axio.A1, Plan-APOCHROMAT 100×/1.4 Oil DIC + Zeiss AxioCam ICc 5. Stacked using Helicon Focus.
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