Doodle showing the diatom Plagiogramma Fossil Diatom Atlas
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Schizonema definitum (Grove & Sturt) Kuntze (1898)
Hemiaulus crenatus Greville (1865)
Entogoniopsis saratoviana (Pantocsek) Witkowski, Sims, Strelnikova & Williams (2015)
Hemiaulus incurvus Schibkova in Krotov & Schibkova (1959)
Rhaphoneis atlantica Andrews (1989)
Rocella vigilans Fenner (1984)