Curios este că fosilele au fost descoperite la finalul anilor 30, însă au rămas virtual necunoscute, într-un depozit al Institutului de Studii Avansate de la Universitatea Wits, Africa de Sud. Oasele fosilizate ale dinozaurului au fost redescoperite în urmă cu doar câţiva ani, atunci când au fost atribuite, în mod eronat, unei specii deja cunoscute, Aardonix. O nouă analiză a lor, efectuată în acest an, a demonstrat că este vorba despre o specie complet necunoscută de dinozaur. Botezată Sefapanosaurus, această creatură a trăit acum circa 200 de milioane de ani şi face parte din familia sauropodomorfelor. În fapt, atât cercetătorii argentinieni, cât şi cei sud-africani sunt convinşi că Sefapanosaurus reprezintă o specie de tranziţie între sauropodomorfe şi giganticele sauropode din Jurasic. l
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