Doodle showing the diatom Plagiogramma Fossil Diatom Atlas
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Lepidodiscus elegans Witt (1886)
Archaegoniothecium langebertalotii Witkowski, Harwood & Kulikovskiy (2012)
Hemiaulus incurvus Schibkova in Krotov & Schibkova (1959)
Hemiaulus echinulatus Jousé (1951)
Briggera affixa (Ross) Ross & Sims (1985)
Entogoniopsis armashevskii (Pantocsek) Witkowski, Sims, Strelnikova & Williams (2015)