The syntypic series, USNM 7189, originally consisted of a caudal vertebra, a metatarsal, and two femoral fragments that were originally identified as humeral and tibial fragments, all found in 1869 by North Carolina state geologist professor Washington Carruthers Kerr in the Black Creek Group of North Carolina.
The syntypic series, USNM 7189, originally included a caudal vertebra, a metatarsal, and two femoral fragments that were initially misidentified as humeral and tibial bones, found in 1869 by Professor Washington Carruthers Kerr of North Carolina's geological department.