''Rapaxavis'' a genus of enantiornithine bird. It has been found in the

Jiufotang Formation The Jiufotang Formation ( Chinese: 九佛堂组, pinyin: ''jiǔfótáng zǔ'') is an Early Cretaceous geological formation in Chaoyang, Liaoning which has yielded fossils of feathered dinosaurs, primitive birds, pterosaurs, and other organisms (see ...

in Liaoning,

People's Republic of China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...

. In 2006 a specimen was reported, discovered by Pan Lijun at Xiaioyugou near the town of Lianhe, and referred to '' Longirostravis''. In 2009 this specimen was named and described as the

type species In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specime ...

''Rapaxavis pani'' by Eric M. Morschhauser, David Varricchio, Gao Chunling, Liu Jinyuan, Wang Xuri, Cheng Xiadong and Meng Qingjin. The generic name combines the

Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ...

''rapax'', "grasping", with ''avis'', "bird", in reference to the special grasping function of the foot. The specific name honours Pan as discoverer. It is also an allusion to Pan, the god of the forests, because the species was assumed to have been

arboreal Arboreal locomotion is the locomotion of animals in trees. In habitats in which trees are present, animals have evolved to move in them. Some animals may scale trees only occasionally, but others are exclusively arboreal. The habitats pose nu ...

. The

holotype A holotype is a single physical example (or illustration) of an organism, known to have been used when the species (or lower-ranked taxon) was formally described. It is either the single such physical example (or illustration) or one of sever ...

, DMNH D2522, was found in a layer of the Jiufotang Formation dating from the early

Albian The Albian is both an age of the geologic timescale and a stage in the stratigraphic column. It is the youngest or uppermost subdivision of the Early/Lower Cretaceous Epoch/ Series. Its approximate time range is 113.0 ± 1.0 Ma to 100.5 ± 0 ...

. It consists of a nearly complete skeleton with skull, on a slab. When the slab was split from its counterplate, the bones did not split with them, preserving them perfectly. The specimen was in 2009 described after having been observed without any preparation. It represents a subadult individual. Later it was prepared but in an unprofessional way, damaging the skeleton, especially the skull where the entire right

jugal bone The jugal is a skull bone found in most reptiles, amphibians and birds. In mammals, the jugal is often called the malar or zygomatic. It is connected to the quadratojugal and maxilla, as well as other bones, which may vary by species. Anato ...

was removed. Subsequently, it was sent to the ''

Natural History Museum of Los Angeles County The Natural History Museum of Los Angeles County is the largest natural and historical museum in the western United States. Its collections include nearly 35 million specimens and artifacts and cover 4.5 billion years of history. This large col ...

'' where a further preparation took place, which managed to repair some of the damage. The knowledge gained during this process was the basis for a more detailed redescription in 2011.O’Connor, J.K., Chiappe, L.M., Gao, C., and Zhao, B. 2011. "Anatomy of the Early Cretaceous enantiornithine bird ''Rapaxavis pani''". ''Acta Palaeontologica Polonica'' 56(3): 463–475

References

Jiufotang fauna Bird genera Early Cretaceous birds of Asia Longipterygids Fossil taxa described in 2009 {{paleo-bird-stub