Results 21 to 30 of about 204 (109)
China shares fossil treasures with the world. [PDF]
Anat Rec (Hoboken)Abstract China has been a rich source of fossils for nearly a century, beginning with the discovery of so‐called Peking man (Sinanthropus pekinensis), known today as Homo erectus pekinensis in the mid 1920s. The first Chinese dinosaurs were described in 1929, the sauropod Helopus (now Euhelopus) and the ornithopod Tanius, described by the Swedish ...
Dodson P.
europepmc +2 more sources
Illuminating the dark mess of fibers: Application of circular cross polarized light in unravelling the bone tissue structure of the dermal pectoral girdle of Metoposaurus krasiejowensis. [PDF]
J AnatCircular cross polarized light reveals the fine stucture of dermal bone tissue of a metoposaurid amphibian from the Late Triassic. Top right image shows the looped interwoven fibered bone when illuminated with circular polarized light displaying increased bone matrix intricacy compared to the same region of the bone when visualized with traditional ...
Kalita S +2 more
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An ankylosaurian dinosaur from the Cenomanian Dunvegan Formation of northeastern British Columbia, Canada [PDF]
Fossil Record, 2020 Fragmentary but associated dinosaur bones collected in 1930 from the Pine River of northeastern British Columbia are identified here as originating from an ankylosaur.
V. M. Arbour +5 more
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Bizarre tail weaponry in a transitional ankylosaur from subantarctic Chile [PDF]
Nature, 2021 Abstract Armoured dinosaurs are well known for forms that evolved specialized tail weapons: paired tail spikes in stegosaurs, and heavy tail clubs in advanced ankylosaurs1. Armoured dinosaurs from southern Gondwana are rare and enigmatic, but likely include the earliest branches of Ankylosauria2-4.
Sergio Soto‐Acuña +18 more
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Frontiers in Earth Science, 2022 Australian dinosaur research has undergone a renaissance in the last 10 years, with growing knowledge of mid-Cretaceous assemblages revealing an endemic high-paleolatitude Gondwanan fauna.
Timothy G. Frauenfelder +7 more
doaj +1 more source
Convoluted nasal passages function as efficient heat exchangers in ankylosaurs (Dinosauria: Ornithischia: Thyreophora). [PDF]
PLoS One, 2018 Convoluted nasal passages are an enigmatic hallmark of Ankylosauria. Previous research suggested that these convoluted nasal passages functioned as heat exchangers analogous to the respiratory turbinates of mammals and birds. We tested this hypothesis by performing a computational fluid dynamic analysis on the nasal passages of two ankylosaurs ...
Bourke JM, Porter WR, Witmer LM.
europepmc +4 more sources
Function and Evolution of Ankylosaur Dermal Armor [PDF]
Acta Palaeontologica Polonica, 2010 Ankylosaurs have spike-, plate-, and club-shaped osteoderms probably used as defensive and/or offensive weapons. Previous studies have proposed the evolution and function of small ankylosaur osteoderms, but histological variations in their defensive weapons are little known.
Hayashi, Shoji +4 more
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Anais da Academia Brasileira de Ciências, 2022 The Snow Hill Island Formation (SHIF; late Campanian – early Maastrichtian) crops out in the northeast of the Antarctic Peninsula and constitutes the basal part of the late Campanian-early Maastrichtian sedimentary succession of the James Ross Basin (NG ...
MARCELO A. REGUERO +14 more
doaj +1 more source
New perspectives on body size and shape evolution in dinosaurs. [PDF]
Biol Rev Camb Philos SocABSTRACT Diversity in the body shapes and sizes of dinosaurs was foundational to their widespread success during the Mesozoic era. The ability to quantify body size and form reliably is therefore critical to the study of dinosaur biology and evolution.
Dempsey M +4 more
europepmc +2 more sources
High-Latitude Dinosaur Nesting Strategies during the Latest Cretaceous in North-Eastern Russia
Diversity, 2023 Dinosaur eggshell fragments attributed to the oofamilies Spheroolithidae and Prismatoolithidae and recovered from the latest Cretaceous Kakanaut Formation of North-eastern Russia (Chukotka) constitute one of the northernmost records of dinosaur ...
Romain Amiot +8 more
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