30109- Eocene 7.09 Inch Palaeoperca proxima Fossil Fish - Messel Shale Turtle Sister taxa: Ankistrorhynchus

Sister taxa: Ankistrorhynchus

Mosasauridae) from the Maastrichtian of Angola

Marx & Uhen 2010)

open shallow subtidal (2)

Erythrite or red cobalt is a secondary hydrated cobalt arsenate mineral with the formula (Co3(AsO4)2·8H2O)

30109- Eocene 7.09 Inch Palaeoperca proxima Fossil Fish - Messel Shale Turtle Sister taxa: AnkistrorhynchusPalaeoperca, Micklich 1978 (perch like fish) Osteichthyes Perciformes It was prepared using a classic resin transfer process. Since the oil shales the fossils at Messel are filled with water they would disintegrate if allowed to dry out. The fossils are coated in a layer of resin to create an artificial matrix and then all of the shale is removed from the other side. This leaves the fossil embedded in a plate of hardened resin.