Asterodermus platypterus, stingray Troodon average between one and three

average between one and three inches in length and have an elliptical

Paracytalocrinus hamitensis

Examinations of the Taung Child fossil compared to that of an equivalent 9-year-old child suggest that A

and Bridgerian North American Land Mammal Ages

Charnia is the genus name given to a frond-like Precambrian lifeform with segmented ridges branching alternately to the right and left from a zig-zag medial suture

Asterodermus platypterus, stingray Troodon average between one and threeAsterodermus platypterus was a ray species that lived during the Jurassic period (200 145 million years ago). This ray shared the seas with Ichthyosarus and Plesiosaurs. Fossils of Asterodermus have been found in Britain, France, and Germany. Asterodermus is classified in the family Rhinobatidae. Living members of this family are often called guitarfishes. The original of this specimen was found in the Jurassic beds of the Solenhofen Limestone,