This mentioned taxonomy is an attempt to make an conclusive assignment from the different classifications of various scientists. Because the taxonomy may change due to the latest investigative methods and other findings, our map is a guide only.
Corresponding author (Name, Year)
Ref.: J. D. Powell. 1963. Cenomanian-Turonian (Cretaceous) ammonites from Trans-Pecos, Texas and Northeastern Chihuahua, Mexico. Journal of Paleontology 37(2):309-322