Glorioptychus callidus Hanna (1927)
Comment: A well-preserved valve with a complex pattern of valve face undulations, typical for this species.
Locality:
Til'tim, Tyumen'sk District, Russia, sample: Part of the original material studied by Nina Strelnikova. Subsample received from David Harwood (Late Cretaceous).
Photographed using: Zeiss Axio.A1, Plan-APOCHROMAT 100×/1.4 Oil DIC + Zeiss AxioCam ICc 5. Stacked using Helicon Focus.
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