Dearc (Scottish Gaelic pronunciation: [tʲɛrxk] dearcⓘ) is a genus of large-bodied rhamphorhynchine pterosaur from the Middle Jurassic Lealt Shale Formation of Scotland.

The holotype, a juvenile or subadult that was still actively growing, has an estimated wingspan of 2.5 to 3 meters, making it the largest flying animal of its time.

The specimen preserves most of the body with the exception of the end of the tail, most of the hindlimbs, parts of the wing and the very tip of the beak.

The specimen was found on the east coast of the peninsula of Trotternish, part of the Isle of Skye in north-west Scotland, and the rock slab removed to the University of Edinburgh.

[1][2] In 2022, the type species Dearc sgiathanach was named and described by Natalia Jagielska, Michael O’Sullivan, Gregory F. Funston, Ian B. Butler, Thomas J. Challands, Neil D.L.

Clark, Nicholas C. Fraser, Amelia Penny, Dugald A. Ross, Mark Wilkinson and Stephen Louis Brusatte.

[5] The phylogenetic analysis conducted for Dearc included characters from several independent publications as well as entirely new ones, while also excluding those that are only known from very young animals or known to vary greatly with age.

The resulting tree recovered Dearc to lie within the Rhamphorhynchidae, specifically in a clade alongside Angustinaripterus and Sericipterus, the Angustinaripterini.

[3] Lagerpetidae Raeticodactylus filisurensis Preondactylus bufarinii Eudimorphodon ranzii Dimorphodon macronyx Caelestiventus hanseni Campylognathoides zitteli Fenghuangopterus lii Jianchangnathus robustus Scaphognathus crassirostris Dorygnathus banthensis Cacibupteryx caribensis Parapsicephalus purdoni Rhamphorhynchus muensteri Angustinaripterus longicephalus Dearc sgiathanach Sericipterus wucaiwanensis Changchengopterus pani Wukongopteridae Anurognathidae Pterodactyloidea