Lonchognathosaurus Lonchognathosaurus Lonchognathosaurus was a genus of dsungaripterid pterodactyloid pterosaur from the Albian-age Lower Cretaceous Lianmuqin Formation of Xinjiang, China. The genus was named in 2004 by Michael Maisch, Andreas Matzke and Sun Ge. The type species is "Lonchognathosaurus acutirostris". The genus name is derived from Greek "lonchos", "lance", "gnathos", "jaw" and "sauros", "lizard", in reference to the fact that it is a reptile with pointed jaws. The specific name means "needle snout" in Latin. "Lonchognathosaurus" is based on holotype SGP 2001/19, found near Urumqi in the southern Junggar Basin, the front portion of a skull and lower jaws that came
Cretaceous A 140 Ma age for the Jurassic-Cretaceous boundary instead of the usually accepted 145 Ma was proposed in 2014 based on a stratigraphic study of Vaca Muerta Formation in Neuquén Basin, Argentina. Víctor Ramos, one of the authors of the study proposing the 140 Ma boundary age sees the study as a "first step" toward formally changing the age in the International Union of Geological Sciences. From youngest to oldest, the subdivisions of the Cretaceous period are: Late Cretaceous Maastrichtian – (66-72.1 MYA) Campanian – (72.1-83.6 MYA) Santonian – (83.6-86.3 MYA) Coniacian – (86.3-89.8 MYA) Turonian – (89.8-93.9 MYA) Cenomanian