Claim: Uruguaysuchus was an insect that began existence in the late Cretaceous period, the younger of two epochs that made up the Cretaceous geological period.
Evidence: Uruguaysuchus is an extinct genus of crocodylomorphs from the Late Cretaceous Guichón Formation of Uruguay. Crocodylomorpha is a group of archosaurs that includes the crocodilians and their extinct relatives. Insects or Insecta (from Latin insectum) are hexapod invertebrates and the largest group within the arthropod phylum.