Doodle showing the diatom Plagiogramma Fossil Diatom Atlas
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Xanthiopyxis acrolopha Forti (1912)
Trinacria simulacrum Grove & Sturt (1887)
Auliscus johnsonianus Greville (1863)
Hemiaulus danicus Grunow (1884)
Costopyxis schulzii (Steinecke) Gleser (1984)
Sphynctolethus pacificus (Hajós) Sims (1986)