It was a Tylosaurus

adaptada a climas más templados

could measure up to 6 meters long

begins to retreat

with its neck accounting for a large portion of its overall size

Mononykus olecranus mixotoxodon It was a TylosaurusMononykus olecranus was a small alvarezsaurid theropod dinosaur from the Late Cretaceous of Mongolia, known from fossil remains recovered from deposits in the Gobi Desert. Originally described in the early 1990s by Perle, Norell, Chiappe and Clark, this taxon quickly became recognised as one of the most unusual forms among maniraptoran dinosaurs because of the extreme reduction of its forelimbs and the presence of a single functional claw on each