Microstructural and crystallographic evolution of palaeognath (Aves) eggshells
eLife, 2023 The avian palaeognath phylogeny has been recently revised significantly due to the advancement of genome-wide comparative analyses and provides the opportunity to trace the evolution of the microstructure and crystallography of modern dinosaur eggshells.
Seung Choi +5 more
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Iridescent plumage in a juvenile dromaeosaurid theropod dinosaur
Acta Palaeontologica Polonica, 2023 Colour reconstructions have provided new insights into the lives of dinosaurs and other extinct animals, by predicting colouration patterns from fossilised pigment-bearing organelles called melanosomes.
ANGUS D. CROUDACE +4 more
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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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Acta Palaeontologica Polonica, 2022 We describe a microvertebrate assemblage from the J&M site, of the Upper Cretaceous (Campanian–Maastrichtian) Williams Fork Formation. Breakdown of fossil bearing matrix was achieved with the use of heated dimethyl sulfoxide.
NICKOLAS A. BRAND +5 more
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Novel neuroanatomical integration and scaling define avian brain shape evolution and development
eLife, 2021 How do large and unique brains evolve? Historically, comparative neuroanatomical studies have attributed the evolutionary genesis of highly encephalized brains to deviations along, as well as from, conserved scaling relationships among brain regions ...
Akinobu Watanabe +4 more
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New information on ornithopod dinosaurs from the Late Jurassic of Portugal [PDF]
Acta Palaeontologica Polonica, 2020 retaceous–Paleogene boundary. However, most of the attention has been given to derived forms (hadrosaurids). Herein, cranial and post-cranial ornithopod material from the Upper Jurassic Lourinhã Formation and housed at Museu da Lourinhã is described and ...
Filippo Maria Rotatori +2 more
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Ontogeny and variation in the skull roof and braincase of the hadrosaurid dinosaur Maiasaura peeblesorum from the Upper Cretaceous of Montana, USA [PDF]
Acta Palaeontologica Polonica, 2021 Five new partial skulls of the hadrosaurid dinosaur Maiasaura peeblesorum from the Linster Quarry bone bed (Two Medicine Formation, Campanian) in Montana, USA, provide the basis for a description of the skull roof and braincase morphology of this taxon ...
BRADLEY MCFEETERS +2 more
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eLife, 2021 Ornithischians, one of the three major groups of dinosaurs, developed a unique mechanism to ensure airflow in the lungs.
Marc R Spencer
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Why tyrannosaurid forelimbs were so short: An integrative hypothesis [PDF]
Acta Palaeontologica Polonica, 2022 The unusually shortened limbs of giant theropods, including abelisaurids, carcharodontosaurids, and derived tyrannosauroids such as Tyrannosaurus rex have long been an object of wonder, speculation, and even derision on the part of both ...
KEVIN PADIAN
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Cranial anatomy and stratigraphy of a new specimen of the tyrannosaurine dinosaur Daspletosaurus from the Judith River Formation of Central Montana, USA [PDF]
Acta Palaeontologica PolonicaThe tyrannosaurine Daspletosaurus contains three recognized species from the Campanian of Montana and Alberta: Daspletosaurus torosus, Daspletosaurus wilsoni, and Daspletosaurus horneri. The recently named D. wilsoni has been proposed to represent a
ETHAN WARNER-COWGILL +3 more
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