Anatomy of the Early Cretaceous Enantiornithine Bird Rapaxavis pani

@inproceedings{OConnor2011AnatomyOT,
  title={Anatomy of the Early Cretaceous Enantiornithine Bird Rapaxavis pani},
  author={Jingmai K. O’Connor and Luis Mar{\'i}a Chiappe and Chunling Gao and Bo Zhao},
  year={2011}
}
The exquisitely preserved longipterygid enantiornithine Rapaxavis pani is redescribed here after more extensive preparation. A complete review of its morphology is presented based on information gathered before and after preparation. Among other features, Rapaxavis pani is characterized by having an elongate rostrum (close to 60% of the skull length), rostrally restricted dentition, and schizorhinal external nares. Yet, the most puzzling feature of this bird is the presence of a pair of… Expand
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References

SHOWING 1-10 OF 74 REFERENCES
A revision of enantiornithine (Aves: Ornithothoraces) skull morphology
TLDR
A comprehensive overview of the current knowledge of enantiornithine skull anatomy is presented and a number of trophic specializations can be deduced from the range of preserved morphologies, further hinting at the morphological and ecological diversity of the Cretaceous Enantiornithes. Expand
Anatomy of the Early Cretaceous Bird Rapaxavis Pani, A New Species From Liaoning Province, China
TLDR
A comparison of the proportions of the pedal phalanges of Rapaxavis to modern birds shows the longirostrine enantiornithean taxon to be highly adapted to a grasping, arboreal lifestyle. Expand
A NEW AND PRIMITIVE ENANTIORNITHINE BIRD FROM THE EARLY CRETACEOUS OF CHINA
Abstract A new Early Cretaceous enantiornithine bird, Eocathayornis walkeri, gen. et sp. nov. is reported from Liaoning, northeast China. It is about the size of Cathayornis but is more primitive.Expand
Early diversification of birds: Evidence from a new opposite bird
TLDR
The new bird represents a new ecological type different from all known members of Enantiornithes, and shows that enantiornithines had probably originated earlier than the Early Cretaceous, or this group had experienced a rapid radiation right after it first occurred in the early EarlyCretaceous. Expand
A new, three-dimensionally preserved enantiornithine bird (Aves: Ornithothoraces) from Gansu Province, north-western China
TLDR
The exceptional, three-dimensional preservation of these specimens (compared to the crushed, nearly two-dimensional condition of most other Early Cretaceous avian fossils) reveals new information regarding enantiornithine anatomy, evolution, and diversity. Expand
THE SMALLEST KNOWN TRICERATOPS SKULL: NEW OBSERVATIONS ON CERATOPSID CRANIAL ANATOMY AND ONTOGENY
TLDR
The discovery of the smallest Triceratops skull provides a new ontogenetic end member for the earliest stage of ceratopsid cranial development and shows that the cranial ornamentation of the frill and the postorbital horns were not restricted to adults, but began at an early age in this species. Expand
The Morphology and Phylogenetic Position of Apsaravis ukhaana from the Late Cretaceous of Mongolia
TLDR
The implications of Apsaravis ukhaana, and the results of the phylogenetic analysis, for the evolution of flight after its origin and character support for enantiornithine monophyly are extensively discussed. Expand
A new Enantiornithine bird from the Late Cretaceous of the Gobi desert
TLDR
The combination of phylogeny and functional interpretation suggests that this new fossil bird is a representative of a flightless lineage, providing the first evidence of a trend towards more limited flying capabilities among Enantiornithes, a group of Cretaceous birds otherwise believed to be represented by competent fliers. Expand
Juvenile Birds from the Early Cretaceous of China: Implications for Enantiornithine Ontogeny
TLDR
The skeletal morphology of three nearly complete early juvenile avians from the renowned Early Cretaceous Yixian Formation of Liaoning Province in northeastern China are reported on, suggesting that fledging occurred very early in ontogeny, thus supporting a precocial or highly precocial strategy for enantiornithine hatchlings. Expand
Phylogenetic Support for a Specialized Clade of Cretaceous Enantiornithine Birds with Information from a New Species
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 enantiornithineExpand
...
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