Aerotitan

Aerotitan is a genus of large azhdarchid pterosaur known from the Late Cretaceous period (Maastrichtian stage) of what is now the Allen Formation of the Neuquén Basin in northern Patagonia, Argentina.
Discovery and naming.
The type species "Aerotitan sudamericanus" was named and described in 2012 by Fernando Novas, Martin Kundrat, Federico Agnolín, Martin Ezcurra, Per Erik Ahlberg, Marcelo Isasi, Alberto Arriagada and Pablo Chafrat. The generic name is derived from Greek ἀήρ, "aer", "air", and Titan, in reference to the fact the species represents a large flying reptile. The specific name refers to its provenance from South America.
The holotype, MPCN-PV 0054, has been recovered near the Bajo de Arriagada site, in Patagonia, from a layer of the upper Allen Formation. It consists of a partial rostrum with a preserved length of . This snout is elongated and transversely compressed and the jaws are toothless. The wingspan has been estimated as at least .
Taxonomy.
"Aerotitan" has been assigned to the Azhdarchidae. If correct, this would make it the first unambiguous azhdarchid from South America. A study published by Nicholas Longrich and colleagues in 2018 classified the genus as a thalassodromid, sister taxon to "Alanqa" (a pterosaur also assigned as an azhdarchid), however, such assignment is not well-supported. The cladogram of their analysis is presented below: