Doodle showing the diatom Plagiogramma Fossil Diatom Atlas
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Actinoptychus wittianus Truan y Luard & Witt (1888)
Arachnoidiscus clarus Brown (1933)
Actinoptychus simbirskianus Schmidt (1875)
Truania archangelskiana Pantocsek (1886)
Actinoptychus virginicus (Grunow) Andrews (1976)
Asterolampra insignis Schmidt (1888)