Buuxi weedha soo socota: Noocyada noocan ah ee "Gryposuchus" waa "G. jessei", oo loo magacaabay iyada oo ku saleysan rostrum si fiican loo ilaaliyay oo laga soo ururiyey webiga Pauini ee Brazil sanadkii 1912. waxaa laga yaaba in ninkaasi uu burburay intii lagu jiray dagaalkii labaad ee aduunka
1943 duqeynta Hamburg. Nooc kale oo la yiraahdo UFAC 1272, oo ka kooban premaxilla iyo maxilla, ayaa laga helay aagga u dhow Sena Madureia ee dhamaadka Miocene Solimões Formation, waxaana loo gudbiyay noocyada 1997. "G. jessei" waxaa sidoo kale loo yaqaan Urumaco Formation ee waqooyi-galbeed Venezuela. Nooc labaad, "G. neogaeus", ayaa loo gudbiyay jinsiga 1982; tusaalooyinka noocyadan ayaa markii ugu horreysay laga soo sharaxay dhamaadkii Miocene Ituzaingó Formation ee Argentina 1885, in kasta oo lagu tilmaamay "Rhamphostomopsis" waqtigaas.