The Retz Formation is a geologic formation in Austria. It preserves fossils of Metaxytherium krahuletzi, dated to the Burdigalian stage of the Miocene period.^[1]

• List of fossiliferous stratigraphic units in Austria

• D. P. Domning and P. Pervesler. 2001. The osteology and relationships of Metaxytherium krahuletzi Deperet, 1895 (Mammalia, Sirenia). Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft Frankfurt am Main 553:1-89

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