guillermoi `Terror Bird´) is a genus of phorusrhacidae

characterized by robust cranial morphologies and distinctive dental patterns

it may have been an agile and fast hunter

aunque tradicionalmente ha sido considerada parte de un grupo intermedio entre los verdaderos elefantes y los más arcaicos stegodontes y amebelodontes

Snout-tail length 148 mm

Udanoceratops tschizhovi Variant:Primed guillermoi `Terror Bird´) is aUdanoceratops tschizhovi was a ceratopsian dinosaur belonging to the family Leptoceratopsidae that lived during the Late Cretaceous, approximately 7270 million years ago, in what is now Mongolia. Its remains come mainly from the Barun Goyot Formation in the Gobi Desert, an environment that during the Cretaceous corresponded to semi arid regions with dune systems, floodplains, and sparse vegetation. It was one of the largest known leptoceratopsids. It