Doodle showing the diatom Plagiogramma Fossil Diatom Atlas
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Strangulonema barbadense Greville (1865)
Truania archangelskiana Pantocsek (1886)
Raphidodiscus marylandicus Christian (1887)
Costopyxis antiqua Gleser (1984)
Triceratium unguiculatum Greville (1864)
Goniothecium decoratum Brun (1891)