''Orientognathus'' is a genus of

rhamphorhynchid Rhamphorhynchidae is a group of early pterosaurs named after ''Rhamphorhynchus'', that lived in the Late Jurassic. The family Rhamphorhynchidae was named in 1870 by Harry Govier Seeley.Seeley, H.G. (1870). "The Orithosauria: An Elementary Study o ...

pterosaur from the

Middle Jurassic The Middle Jurassic is the second Epoch (geology), epoch of the Jurassic Period (geology), Period. It lasted from about 174.1 to 161.5 million years ago. Fossils of land-dwelling animals, such as dinosaurs, from the Middle Jurassic are relativel ...

of China. It is known from a single specimen which includes most of the skeleton and skull, and was first named and described in 2015 by

Lü Junchang Lü Junchang (; 1965 – 9 October 2018) was a Chinese palaeontologist and professor at the Institute of Geology, Chinese Academy of Geological Sciences. An expert on Mesozoic reptiles, he described and named dozens of dinosaur and pterosaur taxa ...

''et al.''. The taxon was found in the

Tuchengzi Formation The Tuchengzi Formation (formerly known as Tucheng Conglomerate, from ) is a geological formation in China whose strata span the Tithonian (Late Jurassic) to Berriasian (Early Cretaceous) ages.Liu Y.-Q. Kuang H.-W., Jiang X.-J., Peng N., Xu H. & ...

of China, which is slightly younger than the

Tiaojishan Formation The Tiaojishan Formation is a geological formation in Hebei and Liaoning, People's Republic of China, dating to the middle-late Jurassic period (Bathonian-Oxfordian (stage), Oxfordian stages). It is known for its Lagerstätte, exceptionally preser ...

that most other Middle Jurassic pterosaurs from the region have been found in. The description study produced a phylogenetic analysis, which determined that ''Orientognathus'' was a basal member of Rhamphorhynchidae, possibly within

Rhamphorhynchinae Rhamphorhynchidae is a group of early pterosaurs named after ''Rhamphorhynchus'', that lived in the Late Jurassic. The family Rhamphorhynchidae was named in 1870 by Harry Govier Seeley.Seeley, H.G. (1870). "The Orithosauria: An Elementary Study o ...

References

{{pterosaur-stub Rhamphorhynchidae Middle Jurassic pterosaurs of Asia Jurassic China Taxa named by Lü Junchang Fossil taxa described in 2015 Pterosaur genera