Yoshisaurus

Yoshisaurus (name meaning spendid reptile), aka Yoshi or yoshi, is an formerly extinct species of non-avian theropod dinosaur that live in South American and North American scrublands, praries, and forests during the Late Cretaceous from about 72.7 million years ago to 66 million years ago. The yoshi is a derived member of Abelisauridae, a family of theropods that mostly occupied the large predatorial niche in the southern continents, which once formed the supercontinent Gondwana, during the Cretaceous. Its closest relatives includes Carnotaurus, Giganotocarnotaurus, and Aurocarnotaurus (which may be the same species as Giganotocarnotaurus), and like them, yoshis have four short fingers on stubby useless arms. Just like the Aurocarnotaurus, yoshis also made it into North America, where they carved out their own niches in the Late Cretaceous. They are also the most agile of the Abelisaurids, being a swift slim lightly-built hunter almost as fast as a cheetah, but is also an ambush predator like a big cat and unlike cheetahs. They also have protofeathers on the backs of their necks and heads, further confirming that birds are a surviving group of (native) theropod dinosaurs (along with wounders). They also have large eyes to see very well in both day and night and are active at both times. They have long sticky frog-like chameleon-like tongues, which were (in its native range and timeline) evolved to hunt other small and medium-sized dinosaurs (including ornithopods, etc). They have bony armor all over their bodies, presumably for protection against rivals and/or other predators. Ever since they were brought back and saved from the mass extinction caused by an asteroid impact and its effects in the Late Cretaceous, yoshis were found only in zoos and safari parks, but after some escaped from zoos and safari parks, they have quickly establish populations throughout both North and South America.