Doodle showing the diatom Plagiogramma Fossil Diatom Atlas
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Pyxilla oligocaenica Jousé (1955)
Entogoniopsis saratoviana (Pantocsek) Witkowski, Sims, Strelnikova & Williams (2015)
Fenneria kanayae (Fenner) Witkowski (2018)
Raphidodiscus marylandicus Christian (1887)
Grunowiella gemmata (Grunow) Van Heurck (1896)
Craspedodiscus barronii Bukry (1984)