Triceratium secedens Schmidt (1888)
Comment: A large, well-preserved valve with strongly convex sides.
Locality: Oamaru, New Zealand, The Natural History Museum slide BM 35668 (Eocene-Oligocene Transition).
Photographed using: Zeiss Axio.A1, EC Plan-NEOFLUAR 40×/0.75 + Zeiss AxioCam ICc 5. Stacked using Helicon Focus.
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