pero también en un animal visualmente imponente dentro del imaginario de las sociedades humanas de la Edad de Hielo

allowing it to control its buoyancy in a similar way to modern nautiloids

which could measure more than 30 centimeters

hunting alone and not having many natural predators

In phylogenetic terms

Kosmodraco dakotensis sexta_extincion pero también en un animalKosmodraco dakotensis was a freshwater choristodere from the Palaeocene of North America. It was originally described as Simoedosaurus dakotensis and was later reassigned to the genus Kosmodraco. This animal was neither a dinosaur nor a crocodile, although its general appearance may have superficially resembled that of certain predatory aquatic reptiles. It belonged to Choristodera, a lineage of semi aquatic diapsids that survived the end Cretaceous