Utahraptor ostrommaysi Escala:1:35 contributed to the development of

contributed to the development of characteristics that would eventually define mammals as a group

it is believed that they had thermoregulatory functions or could have been used in visual communication between individuals

Plateosaurus engelhardti had long

and it is possible that Sinosauropteryx used them for courtship or to scare away predators

Utahraptor ostrommaysi Escala:1:35 contributed to the development ofUtahraptor ostrommaysi fue uno de los mayores dromeosuridos conocidos y uno de los depredadores ms representativos del Cretcico Inferior de Norteamrica. Sus restos proceden de la Formacin Cedar Mountain, en el este de Utah, especialmente del Miembro Yellow Cat, en depsitos asociados a ambientes continentales de llanuras aluviales, canales fluviales y ecosistemas semiridos con zonas hmedas estacionales. Descrito formalmente por Kirkland, Gaston y Burge