Ichthyostega stensioe, skull Compsognathus chalcedony and other stone of

chalcedony and other stone of conchoidal fracture

Some marks on the side of the skull indicate that Greererpeton had a lateral line

and those of antiquity

mineral-laden water

Dracorex hogwartsia

Ichthyostega stensioe, skull Compsognathus chalcedony and other stone ofIchthyostega (Greek: "fish roof") is an early genus of tetrapodomorphs that lived at the end of the Late Devonian Period. It was one of the first four limbed vertebrates in the fossil record. Ichthyostega possessed lungs and limbs that helped it navigate through shallow water in swamps. Although Ichthyostega is often labelled a "tetrapod" due to the possession of limbs and fingers, it was more basal ("primitive") than true crown tetrapods, and could