Comparative cranial biomechanics reveal macroevolutionary trends in theropod dinosaurs, with emphasis on Tyrannosauroidea. [PDF]
Anat Rec (Hoboken)Abstract Tyrannosaurus is viewed as a model organism in vertebrate paleontology, with numerous studies analyzing its feeding biomechanics. Nonetheless, the evolution of this feeding performance has been under‐addressed in Tyrannosauroidea, especially in basal tyrannosauroids. Here we used muscle‐force reconstruction and finite element analysis (FEA) to
Johnson-Ransom E +4 more
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Inner Ear Anatomy of Caenagnathidae (Theropoda: Oviraptorosauria) Emphasizes Mosaic Evolution of the Avian Neurosensory System. [PDF]
J Comp NeurolThe phylogenetic position of oviraptorosaurs close to birds makes them a key group for understanding the acquisition of avian senses. Here, we describe the first inner ear endocasts for caenagnathids, a major subclade of oviraptorosaurs, which demonstrates that labyrinth morphology varied more than expected within oviraptorosaurs.
Bazzana-Adams KD, Funston GF, Evans DC.
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The pectoralis muscle orientation as an indicator of the modes of wing-propelled locomotion in birds. [PDF]
J AnatThe pectoralis orientation of birds was consistent with the orientation of the aerodynamic force acting on the wing, varying by wing‐propelled locomotion (WPL) mode. The skeletal morphology unique to each WPL mode, related to the origin/insertion of the pectoralis, may be associated with these functional demands of pectoralis orientation.
Akeda T, Fujiwara SI.
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A Carcharodontosaurid tooth from the Hasandong Formation (Lower Cretaceous) of South Korea
Mongolian Geoscientist, 2020 A large tooth of theropod dinosaur that was recovered from the Hasandong Formation (Lower Cretaceous; Aptian-Albian) in Daedo island, Hadong Couty, South Gyeongsang Province of South Korea is redescribed.
Chan-gyu Yun
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Exceptional preservation of tracheal rings in a glyptodont mammal from the Late Pleistocene of Argentina [PDF]
Acta Palaeontologica Polonica, 2020 Exceptionally well-preserved material from a fossil mammal is presented. For the first time, several fragments of tracheal rings and cricoid cartilage assigned to Panochthus sp.
Martín Zamorano
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Bite and tooth marks on sauropod dinosaurs from the Morrison Formation [PDF]
PeerJ, 2023 Tooth-marked bones provide important evidence for feeding choices made by extinct carnivorous animals. In the case of the dinosaurs, most bite traces are attributed to the large and robust osteophagous tyrannosaurs, but those of other large carnivores ...
Roberto Lei +5 more
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The body plan of Halszkaraptor escuilliei (Dinosauria, Theropoda) is not a transitional form along the evolution of dromaeosaurid hypercarnivory [PDF]
PeerJ, 2020 The dromaeosaurid theropod Halszkaraptor escuilliei is characterized by several unusual features absent in other paravians, part of which has been interpreted as diagnostic of a novel lineage adapted to a semiaquatic ecology. Recently, these evolutionary
Andrea Cau
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A diverse Late Cretaceous vertebrate tracksite from the Winton Formation of Queensland, Australia [PDF]
PeerJ, 2021 The Upper Cretaceous ‘upper’ Winton Formation of Queensland, Australia is world famous for hosting Dinosaur Stampede National Monument at Lark Quarry Conservation Park, a somewhat controversial tracksite that preserves thousands of tridactyl dinosaur ...
Stephen F. Poropat +7 more
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A reassessment of the taxonomic validity of Dynamoterror dynastes (Theropoda: Tyrannosauridae)
Zoodiversity, 2020 Associated fragmentary materials of tyrannosaurid theropod, Dynamoterror dynastes McDonald et al., 2018, were reported in 2018 from the Upper Cretaceous Menefee Formation of New Mexico. However, two originally proposed autapomorphies (i.e. prefrontonasal
Chan-gyu Yun
doaj +1 more source
Multiple optimality criteria support Ornithoscelida [PDF]
Royal Society Open Science, 2017 A recent study of early dinosaur evolution using equal-weights parsimony recovered a scheme of dinosaur interrelationships and classification that differed from historical consensus in a single, but significant, respect; Ornithischia and Saurischia were ...
Luke A. Parry +2 more
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