Lobolith, Crinoid Bulb Float, holdfast Deinonychus Lepidotes inhabited both freshwater lakes

Lepidotes inhabited both freshwater lakes and shallow seas

oil-bearing shale or slate at Holzmaden

This species was a diverse group of spiny Eurypterids and show in the fossil rocks of Norway that they may have been amphibious

The replica specimen presented here shows how injury or disease affected the normal growth of the bone

The first Odonata fossils were found in sediments from the Lower Permian

Lobolith, Crinoid Bulb Float, holdfast Deinonychus Lepidotes inhabited both freshwater lakesThis replica Lobolith comes from the Devonian of Oklahoma. Most crinoids were held in place by a holdfast, root like system. A few species were bottom bobbers and floaters. These unique crinoids are believed to have floated with the currents with the calyx (head) facing down. The Lobolith was chambered and filled with some form of gas produced by the crinoid. The gas caused the crinoid to float and could probably be regulated to allow the crinoid to