Quantitative biomechanical assessment of locomotor capabilities of the stem archosaur Euparkeria capensis [PDF]
Royal Society Open Science, 2023 Birds and crocodylians are the only remaining members of Archosauria (ruling reptiles) and they exhibit major differences in posture and gait, which are polar opposites in terms of locomotor strategies.
Oliver E. Demuth +2 more
doaj +9 more sources
Locomotion and the early Mesozoic success of Archosauromorpha [PDF]
Royal Society Open ScienceThe Triassic was a time of ecological upheaval as life recovered from the Permian-Triassic mass extinction. Archosauromorphs were a key component of the recovery, diversifying substantially during the Triassic and encompassing the origins of dinosaurs ...
Amy E. Shipley +4 more
doaj +3 more sources
Systemic distribution of medullary bone in the avian skeleton: ground truthing criteria for the identification of reproductive tissues in extinct Avemetatarsalia [PDF]
BMC Evolutionary Biology, 2019 Background Medullary bone (MB) is an estrogen-dependent, sex-specific tissue produced by female birds during lay and inferred to be present in extinct avemetatarsalians (bird-line archosaurs). Although preliminary studies suggest that MB can be deposited
Aurore Canoville +2 more
doaj +3 more sources
Femoral specializations to locomotor habits in early archosauriforms. [PDF]
J Anat, 2022 The evolutionary history of archosaurs and their closest relatives is characterized by a wide diversity of locomotor modes, which has even been suggested as a pivotal aspect underlying the evolutionary success of dinosaurs vs.
Pintore R +3 more
europepmc +5 more sources
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
doaj +5 more sources
Braincase and neuroanatomy of the lagerpetid Dromomeron gregorii (Archosauria, Pterosauromorpha) with comments on the early evolution of the braincase and associated soft tissues in Avemetatarsalia [PDF]
The Anatomical Record, 2023 The anatomy of the braincase and associated soft tissues of the lagerpetid Dromomeron gregorii (Archosauria: Avemetatarsalia) from the Late Triassic of the United States is here described.
M. Bronzati +4 more
semanticscholar +3 more sources
The osteology of the Late Triassic reptile Scleromochlus taylori from μCT data [PDF]
The Anatomical Record, 2023 Scleromochlus taylori is one of the most enigmatic members of the herpetofauna from the Lossiemouth Sandstone Formation (Upper Triassic) of Elgin (Moray, Scotland).
D. Foffa +6 more
semanticscholar +4 more sources
The origin and early evolution of feathers: implications, uncertainties and future prospects. [PDF]
Biol LettAs a defining feature of the clade, feathers are key to understanding bird biology. Discoveries of spectacular dinosaur and pterosaur fossils preserving feathers and feather-like integumentary appendages demonstrate trends of increasing complexity in ...
Xu X, Barrett PM.
europepmc +2 more sources
The higher-level phylogeny of Archosauria (Tetrapoda: Diapsida) [PDF]
, 2010 Crown group Archosauria, which includes birds, dinosaurs, crocodylomorphs, and several extinct Mesozoic groups, is a primary division of the vertebrate tree of life.
S. Brusatte +3 more
semanticscholar +3 more sources
Scleromochlus and the early evolution of Pterosauromorpha [PDF]
Nature, 2022 Pterosaurs, the first vertebrates to evolve powered flight, were key components of Mesozoic terrestrial ecosystems from their sudden appearance in the Late Triassic until their demise at the end of the Cretaceous1,2,3,4,5,6. However, the origin and early
D. Foffa +10 more
semanticscholar +8 more sources