Doodle showing the diatom Plagiogramma Fossil Diatom Atlas
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Triceratium pulvinar Schmidt (1888)
Rylandsia biradiata Greville (1861)
Azpeitia tuberculata (Greville) Sims in Fryxell et al. (1986)
Craspedodiscus barronii Bukry (1984)
Entogoniopsis saratoviana (Pantocsek) Witkowski, Sims, Strelnikova & Williams (2015)
Triceratium blanditum Greville (1861)