What ancient ocean once split North America where Xiphactinus thrived?
Answer
Western Interior Seaway
*Xiphactinus* inhabited the Western Interior Seaway, which was a vast, shallow, and notably warm ancient ocean that extended across what is now central North America during the Late Cretaceous. This expansive marine environment was extremely rich in organic material and biomass, creating ideal conditions that fueled the evolution and success of massive apex predators like *Xiphactinus* before the catastrophic K-Pg extinction event reshaped global marine ecosystems.
Related Questions
To which family does the apex predator Xiphactinus belong?During which geological ages did Xiphactinus maintain its predatory success?What is the commonly estimated adult length range for Xiphactinus specimens?How were the teeth of Xiphactinus set, distinguishing it from later bony fishes?What morphological feature did the caudal fin of Xiphactinus share with modern tuna?What potential metabolic state is debated for Xiphactinus compared to most modern fish?What ancient ocean once split North America where Xiphactinus thrived?From which famous chalk beds are detailed Xiphactinus fossils frequently recovered?Which massive marine reptile did Xiphactinus coexist with but not dominate as a predator?Which Xiphactinus species is designated as the more widely known and larger apex predator?What aggressive feeding strategy does the swallowed Protosphyraena illustrate for Xiphactinus?