Doodle showing the diatom Plagiogramma Fossil Diatom Atlas
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Rossiella symmetrica Fenner (1984)
Pyrgupyxis gracilis (Tempère & Forti) Hendey (1969)
Raphidodiscus marylandicus Christian (1887)
Entogoniopsis venosa (Brightwell) Witkowski, Sims, Strelnikova & Williams (2015)
Pyxilla oligocaenica Jousé (1955)
Strangulonema barbadense Greville (1865)