Doodle showing the diatom Plagiogramma Fossil Diatom Atlas
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Navicula placita Grove & Sturt (1887)
Eupodiscus radiatus Bailey (1851)
Lepidodiscus elegans Witt (1886)
Gladius antiquus Forti & Schulz (1932)
Briggera affixa (Ross) Ross & Sims (1985)
Hemiaulus incurvus Schibkova in Krotov & Schibkova (1959)