Doodle showing the diatom Plagiogramma Fossil Diatom Atlas
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Auliscus diffusus (Rattray) Van Landingham (1967)
Dextradonator eximius (Grunow) Ross & Sims (1980)
Horodiscus rugosus Hajós (1975)
Triceratium blanditum Greville (1861)
Craspedodiscus elegans Ehrenberg (1844)
Eupodiscus radiatus Bailey (1851)