Phylogenetic Support for a Specialized Clade of Cretaceous Enantiornithine Birds with Information from a New Species

@inproceedings{OConnor2009PhylogeneticSF,
  title={Phylogenetic Support for a Specialized Clade of Cretaceous Enantiornithine Birds with Information from a New Species},
  author={Jingmai K. O’Connor and Xuri Wang and Luis Mar{\'i}a Chiappe and Chunling Gao and Qingjin Meng and Xiaodong Cheng and Jinyuan Liu},
  year={2009}
}
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… 
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References

SHOWING 1-4 OF 4 REFERENCES
Phylogenetic support for a specialized clade of Cretaceous enantiornithine birds with information from a new species
TLDR
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, which supports the hypothesis that enantiORNithines were strong fliers and adds to the diversity of known tail morphologies of these Cretaceous birds.
none (0); one (1); two (2)
  • The use of “lateral” and “medial” to identify the specific sternal processes is abandoned here due to the difficulty of identifying trabecula when only one is present. Eoenantiornis is scored as a “?” due to the uncertain status of the sternal processes; it is possible that the identified “lateral p
  • 2005
absent (0); present (1)
  • In the pygostyles of some enantiornithine taxa, the distal-most mediolateral width is reduced so that the midline of the pygostyle projects distally farther than the lateral margins
  • 2002
present (0); absent (1)
  • We regard the caudal mandibular fenestra of neornithines as homologous to the surangular fenestra of non-avian dinosaurs
  • 2002