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Palaeontology: Parental care in an ornithischian dinosaur
TLDR
A dramatic specimen of the small ornithischian dinosaur Psittacosaurus sp.
A new rhamphorhynchid (Pterosauria: Rhamphorhynchidae) from the Middle/Upper Jurassic of Qinglong, Hebei Province, China
TLDR
New genus and species of long-tailed pterosaur Qinglongopterus demonstrates that the highly derived skeletal morphology of Rhamphorhynchus, known only from the latest Jurassic (Tithonian) of Europe, had already appeared by the start of the Late Jurassic.
A Second Soundly Sleeping Dragon: New Anatomical Details of the Chinese Troodontid Mei long with Implications for Phylogeny and Taphonomy
TLDR
A second nearly complete, articulated specimen of the basal troodontid Mei long is reported from the Early Cretaceous lower Yixian Formation, Liaoning Province, China, strengthening the hypothesis that both specimens were preserved in a stereotypical life position.
Anatomy of the Early Cretaceous Enantiornithine Bird Rapaxavis pani
TLDR
The holotype and only known specimen of Rapaxavis pani is redescribed here after more extensive preparation and reveals important information for better understanding the anatomy and phylogenetic relationships of longipterygids, in particular, as well as basal birds as a whole.
A NEW BASAL LINEAGE OF EARLY CRETACEOUS BIRDS FROM CHINA AND ITS IMPLICATIONS ON THE EVOLUTION OF THE AVIAN TAIL
TLDR
It is inferred from the specimen that during the evolution of the avian tail, a decrease in relative caudal length and number of vertebrae preceded the distal fusion of caudals into a pygostyle.
Diversification in an Early Cretaceous avian genus: evidence from a new species of Confuciusornis from China
TLDR
A new species of Confuciusornis, the oldest known beaked bird, is erected based on a nearly complete fossil from the Early Cretaceous Yixian Formation of western Liaoning, northeast China, which suggests an arboreal habit of the new bird.
New Species of Enantiornithes (Aves: Ornithothoraces) from the Qiaotou Formation in Northern Hebei, China
TLDR
The new taxon possesses a large postorbital with a long tapering jugal process indicating that some enantiornithines may have had a fully diapsid skull, as in Confuciusornis, and likely represents a previously unknown trophic specialization within Enantiornithes.
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.
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 enantiornithine
A Subadult Specimen of the Early Cretaceous Bird Sapeornis chaoyangensis and A Taxonomic Reassessment Of Sapeornithids
TLDR
The anatomy and bone microstructure of a new subadult specimen of Sapeornis chaoyangensis from the Early Cretaceous of Liaoning Province, China is described, and it is argued that all other named sapeornithids are junior synonyms of S. chaoysangensis.
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