Pridolium als oberstes Alter der obersilurischen Epoche (Ludlowium) und nicht als eigenständige Epoche nach: Walker JD, Geissman JW: Geologic Time Scale. Geological Society of America (2009)
Not included from second file version onwards:
Dorashamium (Synonym für Changhsingium), Dzhulfium (Synonym für Wuchiapingium), Dalejium (Oberemsium), Zlichovium (Untemsium) nach: Deutsche Stratigraphische Kommission (Hrsg.): Stratigraphische Tabelle von Deutschland 2002.
Amarassium nach: Furnish WM: Permian Stage Names: Permian and Triassic Systems and Their Mutual Boundary. In Mem. Can. Soc. Petrol. Geol. 2 (1973): 522–548
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{{Information |Description={{en|1=The paleozoic era. Lettering in German.}} {{de|1=Eine Übersicht zum Paläozoikum, der unteren Ära des Phanerozoikums.}} |Source={{Own}} based on the following sources - Eigene Arbeit auf der Grundlage folgender Quellen: