Rutilaria radiata Grove & Sturt (1886)
Comment: Two small sibling valves linked by well-preserved periplekta. The valve closer to the viewer is incomplete, with the region near the lower pole broken off. The valve further away from the viewer is more complete. Note the row of spines extending along the margin.
Locality: Cormack's Siding, Oamaru, New Zealand, sample: Cormack's Siding (Eocene-Oligocene Transition).
Photographed using: Zeiss Axio.A1, Plan-APOCHROMAT 100×/1.4 Oil DIC + Zeiss AxioCam ICc 5. Stacked using Helicon Focus.
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