Triceratium lineatum Greville (1863)
Comment: Large, straight sided valve photographed from the underside, with the typical pattern of perforated sectors separated by boomerang-shaped hyaline bands.
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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