Doodle showing the diatom Plagiogramma Fossil Diatom Atlas
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Rattrayella antiqua Hajós & Stradner (1975)
Actinoptychus pericavatus Brun (1891)
Actinoptychus simbirskianus Schmidt (1875)
Anthodiscina floreata (Grove & Sturt) Silva (1970)
Aulacodiscus excavatus Schmidt (1876)
Actinoptychus wittianus Truan y Luard & Witt (1888)