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1 November 2010 A Possible Azhdarchid Pterosaur from the Lower Cretaceous Qingshan Group of Laiyang, Shandong, China
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Abstract

A new pterodactyloid pterosaur is identified from the Early Cretaceous Doushan Formaiton of Laiyang, Shandong Province, China, based on a fragmentary humerus. The humerus exhibits several diagnostic characters: deltopectoral crest is elongate and un-warped, its base is slightly displaced relative to the humeral shaft axis, and the crest is swollen terminally and ventrally displaced; humeral shaft is straight and thin-walled with a ‘D’-shaped cross-section. Based on these features, the specimen is referable to the superfamily Azhdarchoidea as Azhdarchidae indet. As the oldest known azhdarchid fossil, the specimen represents a significant stratigraphic range extension for the family. Other non-azhdarchid azhdarchoids such as tapejarids and chaoyangopterids are common in the Jiufotang Formation of western Liaoning, which possibly is equivalent to the Doushan Formation of Laiyang with an age of about 120 Ma. Consequently, the possible coexistence of these azhdarchoids lineages documents that the azhdarchids split from the main azhdarchoid clade occurred no later than the Early Cretaceous.

© 2010 by the Society of Vertebrate Paleontology
Chang-Fu Zhou "A Possible Azhdarchid Pterosaur from the Lower Cretaceous Qingshan Group of Laiyang, Shandong, China," Journal of Vertebrate Paleontology 30(6), 1743-1746, (1 November 2010). https://doi.org/10.1080/02724634.2010.521219
Received: 18 April 2010; Accepted: 1 June 2010; Published: 1 November 2010
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