Triceratium lineatum Greville (1863)
Comment: Large, slightly convex-sided valve, photographed with the underside facing toward the viewer. The polar ocelli are dissolved, but otherwise the fragile, densely perforated valve is well preserved.
Locality: Oamaru, New Zealand, The Natural History Museum slide BM 77754 (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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