Phorusrhacids Known As Terror Birds Are A Group Of Extinct

Phorusrhacids Known As Terror Birds Are A Group Of Extinct Phorusrhacids are an extinct group within cariamiformes, the only living members of which are the two species of seriemas in the family cariamidae. while they are the most taxon rich group within cariamiformes, the interrelationships between phorusrhacids are unclear due to the incompleteness of their remains. [ 37 ]. Ecology. the size of phorusrhacids varied heavily as might be expected of such a diverse group. 2 estimates a mass of the smallest species, psilopterus bachmani at 5kg with a height of about 80cm and the largest estimate for a species at 180kg for paraphysornis brasiliensis (2) (not including the brontornithines), though kelenken guillermoi likely reached larger sizes (5, 10).

Phorusrhacidae Aka Terror Birds Paleontology World This makes the phorusrhacids the only known large south american predator to migrate north in the great american interchange that followed the formation of the isthmus of panama land bridge (the main pulse of the interchange began about 2.6 ma ago; titanis at 5 ma was an early northward migrant). Can't sign in? forgot your username? enter your email address below and we will send you your username. Transatlantic terror birds. From about 60 million years ago, when they arose, until they went extinct 57 or so million years later, the family of birds known as phorusrhacids spread across south america, ultimately becoming.