Doodle showing the diatom Plagiogramma Fossil Diatom Atlas
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Pyrgupyxis gracilis (Tempère & Forti) Hendey (1969)
Craspedodiscus barronii Bukry (1984)
Rylandsia biradiata Greville (1861)
Craspedodiscus coscinodiscus (Ehrenberg) Ehrenberg (1844)
Trinacria pileolus (Ehrenberg) Grunow (1884)
Stictodiscus kamischevensis Chenevière (1934)