Jurassic and cretaceous marine connections between the Southeast Pacific and Tethys

The affinities of the ammonoid faunas from central-west and southern South America are used to analyze the evolution of seaways and oceanic connections with Tethys during the Jurassic and Cretaceous. During the Early and Middle Jurassic, marine connection with eastern Tethys was around the Australian margin of Gondwana. From the Pliensbachian onwards, connection with western Tethys occurred through the sporadically opened “Hispanic Corridor” in...