Actinoptychus marylandicus Andrews (1976)
Comment: Medium-sized valve.
Locality: Richmond, Virginia, USA, sample: split shared by Anne Gleich (middle Miocene).
Photographed using: Zeiss Axio.A1, Plan-APOCHROMAT 100×/1.4 Oil DIC + Zeiss AxioCam ICc 5. Stacked using Helicon Focus.
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