Doodle showing the diatom Plagiogramma Fossil Diatom Atlas
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Azpeitia tuberculata (Greville) Sims in Fryxell et al. (1986)
Triceratium pulvinar Schmidt (1888)
Grunowiella gemmata (Grunow) Van Heurck (1896)
Pseudopodosira bella Posnova & Gleser in Gleser & Posnova (1964)
Trinacria excavata Heiberg (1863)
Sceptroneis praecaducea Hajós & Stradner (1975)