Doodle showing the diatom Plagiogramma Fossil Diatom Atlas
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Gladiopsis speciosa (Schulz) Gersonde & Harwood (1990)
Hemiaulus imperator Witkowski (2022)
Hemiaulus oreshkinae Witkowski (2022)
Hemiaulus asymmetricus Jousé (1951)
Pyrgupyxis gracilis (Tempère & Forti) Hendey (1969)
Medlinia deciusii (Hanna) Nikolaev & Kociolek in Nikolaev et al. (2001)