Camel Poebrotherium Wilsoni Skull cast. Eocene/Oligocene. 38 to 30.8 MYA. Poebrotherium Wilsoni can be commonly found at White River Formation, Nebraska. Poebrotherium Wilsoni was first named in 1848 meaning "Grass Eating" "Wild Beast". They had the appearance of camels that live today, but were the height of a goat- about 3 ft. tall. Skull Cast Length: 22 cm.