Exter Formation

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).

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 mertensi
 * Termatosaurus albertii
 * Termatosaurus crocodilinus
 * Plateosaurus sp.
 * Plesiosauria 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 gartzii

Flora

 * Becklesia franconica