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12 March 2009 Phylogenetic Support for a Specialized Clade of Cretaceous Enantiornithine Birds with Information from a New Species
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Abstract

A new species of enantiornithine bird from the Lower Cretaceous Yixian Formation of northeastern China is reported. The new taxon, Shanweiniao cooperorum, possesses several enantiornithine synapomorphies as well as the elongate rostral morphology (rostrum equal to or exceeding 60% the total length of the skull) of the Chinese early Cretaceous enantiornithines, Longipteryx chaoyangensis and Longirostravis hani. The discovery of this new specimen highlights the existence of a diverse clade of trophically specialized enantiornithines, Longipterygidae, for which we present phylogenetic support in a new comprehensive cladistic analysis of Mesozoic birds. Shanweiniao provides new information on the anatomy of longipterygids, and preserves a rectricial morphology previously unknown to enantiornithines, with at least four tail feathers closely arranged. This supports the hypothesis that enantiornithines were strong fliers and adds to the diversity of known tail morphologies of these Cretaceous birds.

© 2009 by the Society of Vertebrate Paleontology
Jingmai K. O'Connor, Xuri Wang, Luis M. Chiappe, Chunling Gao, Qingjin Meng, Xiaodong Cheng, and Jinyuan Liu "Phylogenetic Support for a Specialized Clade of Cretaceous Enantiornithine Birds with Information from a New Species," Journal of Vertebrate Paleontology 29(1), 188-204, (12 March 2009). https://doi.org/10.1671/039.029.0121
Received: 13 January 2008; Accepted: 1 July 2008; Published: 12 March 2009
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