A new ?chaoyangopterid (Pterosauria: Pterodactyloidea) from the Cretaceous Kem Kem beds of southern Morocco

James McPhee, Nizar Ibrahim, Alex Kao, David M. Unwin, Roy Smith, David M. Martill

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A new genus and species of edentulous pterodactyloid pterosaur with a distinctive partial rostrum from the mid-Cretaceous (?Albian/Cenomanian) Kem Kem beds of southeast Morocco is described. The taxon is assigned to Chaoyangopteridae based upon its edentulous jaws, elongate rostrum and slightly concave dorsal outline. The rostral cross-section is rounded dorsally and concave on the occlusal surface. The lateral margins are gently convex dorsally becoming slightly wider toward the occlusal border, and a row of small lateral foramina parallel to the dorsal margin determines it as a taxon distinct from other chaoyangopterids. Apatorhamphus gyrostega gen et sp. nov. is a pterosaur of medium to large size (wingspan likely somewhere between ~3 m and ~7 m). This new species brings the number of named Kem Kem azhdarchoids to three, and the number of named Kem Kem pterosaurs to five, indicating a high pterosaur diversity for the Kem Kem beds.

Original languageEnglish
Article number104410
JournalCretaceous Research
Early online date8 Feb 2020
Publication statusPublished - 1 Jun 2020


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