Xanthioisthmus panduraeformis (Pantocsek) Suto (2006)
Comment: Valves of this resting spore taxon usually resemble a peanut; one lobe on this valve is broken.
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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