Protostega gigas Fossil Sea Turtle Skull Stegosaurus these fishes lived in the

these fishes lived in the Tethys Ocean

This specimen and species were renamed Ctenochasma elegans

and the last species

consisting mostly of limb bones and isolated cervical vertebrae and ribs

(Australopithecus boisei)

Protostega gigas Fossil Sea Turtle Skull Stegosaurus these fishes lived in theProtostega gigas Fossil Sea Turtle Skull Protostega meaning (first roof) is an extinct genus of marine turtle containing a single species, Protostega gigas. Its fossil remains have been found in the Smoky Hill Chalk formation of western Kansas dated to 83. 5 million years ago. Fossil specimens of this species were first collected in 1871, and named by Edward Drinker Cope in 1872. With a length of 3 meters (9. 8 ft.), it is the second largest sea