Argentinadraco~mv2 d 1981 1484 s 2
Life restoration of Argentinadraco barrealensis
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Order: Pterosauria
Suborder: Pterosauromorpha
Family: Azdharchidae
Genus: Argentinadraco
Kellner & Calvo, 2017
  • A. barrealensis Kellner & Calvo, 2017 (type)

Argentinadraco barrealensis by lythronax argestes-dbp8bgs

Skeletal restoration

Argentinadraco (whose name means "Argentine dragon") is an extinct genus of azdarchoid pterosaur that lived in the Upper Cretaceous, about 90 million years ago ( Turonian - Coniacian ), in what is now the Portezuelo Formation, in the Province of Neuquén, Argentina . The genus contains a single species, A. barrealensis, described by Alexander Kellner and Jorge Calvo based on a single fragmentary jaw.



The jaw is mostly complete, but it lacks both the apex, both front and back. The fragment is about 26 inches (10 inches) long, but it is possible that the entire length of the jaw is also double. From the top, the jaw has an Y shape, with a very long and narrow sinphis. The symphysis area was wide about 15-6 mm , probably tapering towards the tip.


Lower jaw; shown from two angles

In the lateral view, the most distinctive characteristic of the fragment is a rounded crest towards the end of the jaw at the back of the symphysis. In front of the crest, the jaw is about 3.5 centimeters thick, tapering toward the tip. The oral margin of the jaws is quite flat. In the area above the ridge is seen a central groove connected to two grooves and adjacent grooves, both running on the longitudinal axis. The total of the oral margin and the symphonic region, including the ridge, were probably covered with keratin , forming a beak .


No other animal skeleton is known, but by comparison with other related pterosaurs it was possible to approach at least the wingspan of the animal, which was about 2.5-3 meters (8-10 feet).


Kellner and Calvo compared Argentinadraco with several other pterosaurs, including pteranodonts, nyctosaurids, thalassodromoids, chaoyangopterides, and azhdarchids, without being able to be included in any specific family. It was therefore provisionally identified as a basal member of the azhdarchidae family.


Argentinadraco lived in the Upper Cretaceous, about 90 million years ago. At that time her habitat was formed by a vast wooded plain, crossed by several rivers. The animal shares this environment with various theropods such as Elemgasem, Neuquénraptor, Unenlagia, Pamparaptor and Megaraptor. Patagonykus, and the sauropods Malarguesaurus, Baalsaurus and Futalognkosaurus.


Locality o