Bonaparte and colleagues ( 2007 ) found another early Brazilian dinosaur Saturnalia to be very similar to it .
Bonaparte and colleagues ( 2007 ) placed the two in the Guaibasauridae which was found to be a primitive saurischian group .
Bonaparte and colleagues ( 2007 ) found another early Brazilian dinosaur Saturnalia to be very similar to it , and placed the two in the Guaibasauridae which was found to be a primitive saurischian group .