Doodle showing the diatom Plagiogramma Fossil Diatom Atlas
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Schizonema definitum (Grove & Sturt) Kuntze (1898)
Rhaphoneis atlantica Andrews (1989)
Sheshukovia castellata (West) Gleser (1984)
Brightwellia coronata (Brightwell) Ralfs in Pritchard (1861)
Pyxilla oligocaenica Jousé (1955)
Entogoniopsis saratoviana (Pantocsek) Witkowski, Sims, Strelnikova & Williams (2015)