Actinoptychus maculatus (Grove & Sturt) Schmidt (1888)
Comment: A large, well-preserved valve.
Locality: Oamaru, New Zealand, The Natural History Museum slide BM coll. Adams G11, from Edmund Grove Collection (Eocene-Oligocene Transition).
Photographed using: Zeiss Axioplan, Plan-NEOFLUAR 40×/0.75 + Zeiss AxioCam MRc. Stacked using Helicon Focus.
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