The Exter Formation is the only formation of the Upper Keuper or Rhätsandstein, and is a geologic formation in Germany. It preserves fossils dating back to the Rhaetian of the Triassic period (specifically around 205 Ma).Exter Formation at Fossilworks.orgRhätkeuper at Fossilworks.org
Fossil content The formation has provided fossils of:
Mammals Thomasia antiqua Haramiyidae indet.
Therapsids Chalepotherium plieningeri
Reptiles
"Ichthyosaurus" rhaeticus Megalosaurus cloacinus Nothosaurus cloacinus Phytosaurus cubicodon? Phytosaurus cylindricodon? Plateosaurus ornatus Rhaeticosaurus mertensiWintrich et al., 2017 Termatosaurus albertii Termatosaurus crocodilinus Plateosaurus sp.Fraas, 1897 Plesiosauria indet. Saurophodomorpha indet. Pterosauria indet.
Fish
Ceratodus cloacinus C. heteromorphus C. parvus C. trapezoides Hybodus cloacinus H. sublaevis Lissodus minimus Nemacanthus monilifer Sargodon tomicus Acrodus sp. Asterolepis sp. Raja sp.
Insects Triassothemis gartziiBapth et al., 2013
Flora Becklesia franconicaVan Konijnenburg-van Cittert et al., 2021
See also List of fossiliferous stratigraphic units in Germany
References
Bibliography