Ocorrência de Ischyrhiza (Batoide: Sclerorhynchidae) no Grupo Itapecuru, Cretáceo (Albiano) do estado do Maranhão, Brasil. [OCCURRENCE OF ISCHYRHIZA (BATOIDEA: SCLERORHYNCHIDAE) ON THE ITAPECURU GROUP, CRETACEOUS (ALBIAN) FROM STATE OF MARANHÃO, BRAZIL.] Brazilian Geographical Journal, Geosciences and Humanities research medium, 3(1), 41–49
