Doodle showing the diatom Plagiogramma Fossil Diatom Atlas
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Liradiscus ovalis Greville (1865)
Pseudotriceratium chenevieri (Meister) Gleser (1974)
Medlinia deciusii (Hanna) Nikolaev & Kociolek in Nikolaev et al. (2001)
Cortinocornus rossicus (Pantocsek) Gleser (1984)
Entogoniopsis foveatamorpha Witkowski (2020)
Navicula placita Grove & Sturt (1887)