Doodle showing the diatom Plagiogramma Fossil Diatom Atlas
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Liradiscus ovalis Greville (1865)
Rocella vigilans Fenner (1984)
Glyphodiscus strigillatus Schmidt (1890)
Pyxilla oligocaenica Jousé (1955)
Cortinocornus rossicus (Pantocsek) Gleser (1984)
Stictodiscus novaezealandiae Grunow (1888)