Doodle showing the diatom Plagiogramma Fossil Diatom Atlas
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Archaegoniothecium sutoi Witkowski, Harwood & Kulikovskiy (2012)
Triceratium lineatum Greville (1863)
Horodiscus rugosus Hajós (1975)
Trinacria anissimovii Jousé (1949)
Horodiscus rugosus Hajós (1975)