This ancient cetacean has become an important transitional fossil in understanding the evolution of marine mammals

dicho cuerpo lo podían retraer y encerrarse en su concha mediante un opérculo córneo

other terrestrial vertebrates and possibly carrion

Height 85mm

which means "polar bear"

Koolasuchus cleelandi Archaeopteryx This ancient cetacean has becomeKoolasuchus cleelandi, an extinct giant temnospondyl, emerges as one of the most formidable predators of the ancient Australian landscape. Approximately 120 million years ago, during the early Cretaceous period, in the Barremian, this imposing amphibian reigned over the rivers and streams of what we know today as Australia. Discovered in 1989 by paleontologist Lesley Kool and geologist Mike Cleeland, Koolasuchus cleelandi is known from jaw fragments