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A Comparative Morphological Study of the Jugal and Quadratojugal in Early Birds and Their Dinosaurian Relatives
TLDR
A comparative study of the jugal and quadratojugal morphology of basal birds and their close relatives such as dromaeosaurids and oviraptorids elucidates how modern birds has achieved its derived jugal bar morphology, and sheds light on the evolution of the postorbital configuration of birds.
Evolution of the vomer and its implications for cranial kinesis in Paraves
TLDR
It is concluded that cranial kinesis evolved relatively late, likely an innovation of the Neognathae, and is linked to the transformation of the vomer, enabling the evolution of a diversity of kinetic mechanisms and ultimately contributing to the extraordinary evolutionary success of this clade.
A New Species of Pengornithidae (Aves: Enantiornithes) from the Lower Cretaceous of China Suggests a Specialized Scansorial Habitat Previously Unknown in Early Birds
We describe a new enantiornithine bird, Parapengornis eurycaudatus gen. et sp. nov. from the Lower Cretaceous Jiufotang Formation of Liaoning, China. Although morphologically similar to previously
Medullary bone in an Early Cretaceous enantiornithine bird and discussion regarding its identification in fossils
TLDR
Criteria for identifying medullary bone in fossils is proposed and a new specimen of pengornithid enantiornithine from the Lower Cretaceous Jiufotang Formation is described, considered to be homologous to the medullARY bone of Neornithines.
First species of Enantiornithes from Sihedang elucidates skeletal development in Early Cretaceous enantiornithines
TLDR
The Sihedang locality of the Lower Cretaceous Yixian Formation is the only recognized ornithuromorph-dominated locality in the Jehol Group of north-eastern China and a new taxon Monoenantiornis sihedangia is erected, consistent with the pattern of ossification that occurs in neornithines.
A New Enantiornithine Bird with Unusual Pedal Proportions Found in Amber
TLDR
A new specimen of enantiornithine bird in amber is described at the Angbamo locality in the Hukawng Valley and it is suggested that the elongated third digit was employed in a unique foraging strategy, highlighting the bizarre morphospace in which early birds operated.
A monotreme-like auditory apparatus in a Middle Jurassic haramiyidan.
TLDR
It is proposed that the overlapping incudomallear articulation found in this and other Mesozoic fossils, in extant monotremes and in early ontogeny in extant marsupials and placentals is a morphology that evolved in several groups of mammals in the transition from the dual to the single function for the ossicles.
New anatomical information on the bohaiornithid Longusunguis and the presence of a plesiomorphic diapsid skull in Enantiornithes
TLDR
The rarely preserved postorbital of the bohaiornithid Longusunguis kurochkini is completely preserved on both sides of the skull, confirming the presence of a complete postorbitals bar in some enantiornithines.
Ascaris spp. and Capillaria caudinflata infections in captive-bred crested ibis (Nipponia nippon) in China.
TLDR
Strategies are introduced to improve the breeding management of the birds, enhance their health, and stimulate population productivity, and their transmission in the N. nippon population.
Cranial osteology of the Early Cretaceous Sapeornis chaoyangensis (Aves: Pygostylia)
TLDR
The results of this study demonstrate that the postorbital bar, jugal bar, nasal, quadrate, and palate in Sapeornis show the plesiomorphic rigid articulations among birds.
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