 The first aetosaurs from North America were also being described at this time . American paleontologist Edward Drinker Cope named Typothorax in 1875 and <unk> in 1877 , both of which were from New Mexico . However , Cope considered these genera to be phytosaurs , crocodile @-@ like aquatic archosaurs that were also common in the Late Triassic . While new material referable to Typothorax has been found in recent years throughout the American southwest , <unk> is no longer considered valid . Cope , along with later paleontologists such as Friedrich von Huene , recognized that remains of the type species E. horridus actually belonged to Typothorax . Another species , E. <unk> , was reassigned to Desmatosuchus in 1953 . 
