Paleoecology
La Colonia Formation is likely the deposits of an environment of estuaries, with low coasts and exchange of inland freshwater with the tidal sea, where there are shellfish and shellfish-like oysters. This portion of the sea is known as the Kawasan Sea as well as the Transgression of Schiller. The most common vertebrates collected include fish, turtles, crocodiles, plesiosaurs, dinosaurs, snakes and mammals. Some snakes found belong to in the families Boidae and Madtsoidae, such as the Alamitophis argentinus. Turtles are represented by at least five taxa, four from Chelidae (Pleurodira) and one from Meiolaniidae (Cryptodira). Within the marine fossils in the area is the plesiosaur Sulcusuchus erraini of the family Polycotylidae. Among the mammals in this area is Reigitherium bunodontum which was considered first record of a South American docodonte and Argentodites coloniensis, possibly of Multituberculata. Among dinosaurs, Carnotaurus was contemporary of the iguanodont Talenkauen and the neovenatorid Orkoraptor. The paleoflora was known for its aquatic components, Paleoazolla and Regnellidium. However, recent paleobotanical discoveries have revealed the presence of a more diverse range of plants associated with these water bodies, including pteridophytes, gymnosperms, and various angiosperms. Among these are the fossils of the fruits of Nelumbonaceae.
Read more about this topic: Carnotaurus