Name: Rapator ornitholestoides
Name Meaning: Plunderer resembling ornitholestes
First Described: 1932
Described By: Huene
Classification: Dinosauria, Saurischia, Theropoda, Neotheropoda, Averostra, Tetanurae, Orionides, Avetheropoda, Coelurosauria, Tyrannoraptora, Tyrannosauroidea, Megaraptora
Rapator is another megaraptor from Australia, found in the Griman Creek Formation of New South Wales. It was about nine meters long but it is only known from a finger bone. It lived in the Aptian stage of the Early Cretaceous, about 105 million years ago. The name is actually thought to be a wrong spelling of the word raptor. Its finger is very similar to that of Ornitholestes, prompting its specific name. After the discovery of Astralovenator, it was classified as a meagaraptoran, and since the two are so similar it was briefly a dubious genus. However, enough differences have been found between the two, and they are separated both by time and by location, making them unlikely to be the same. More material should be found, however, before any more statements about the genus can be made.
Shout out goes to quitetheconversationalist
Name: Aerosteon riocoloradense
Name Meaning:Río Colorado Air Bone
First Described: 2009
Described By: Sereno et al.
Classification: Dinosauria, Saurischia, Theropoda, Neotheropoda, Averostra, Tetanurae, Orionides, Avetheropoda, Allosauroidea, Allosauria, Carcharodontosauria, Neovenatoridae, Megaraptora
Aerosteon was another megaraptorid that was about 9 meters long and a little over 3 meters high. It was found in the Anacleto Formation in Argentina, and it lived in the Santonian stage of the Late Cretaceous, about 84 million years ago. Its classification is under some debate and it has been considered a tyrannosauroid. As it is only known from scattered remains, more specimens should be found before any real conclusions can be made about its classification. It had air filled spaces in its bones, giving it very lightweight bones and its possible that it had an avian like respiratory system, making me fairly convinced it should be rendered with feathers. This would have allowed for greater airflow to and from Aerosteon’s lung, allowing it to regulate its temperature and breathe faster, making it a very active predator.
Shout out goes to xtori34!