Known specimens suggest:

making it the longest-lived non-avian theropod known

Its limbs were robust and allowed it to move on both two and four legs

Approximate measurements of Shastasaurus:

commonly known as thunderbirds

Supayacetus muizoni Variant:Primed Known specimens suggest:Supayacetus muizoni was an archaeocete cetacean belonging to the Basilosauridae, a group of fully aquatic primitive whales that lived during the middle late Eocene, approximately 4037 million years ago, in the coastal waters of present day Peru. It represents a very important transitional form in the early evolution of whales, showing a combination of primitive traits inherited from older archaeocetes and characteristics already clearly adapted to