Forelimb reduction and digit loss were evolutionarily decoupled in oviraptorosaurian theropod dinosaurs [PDF]
Royal Society Open ScienceTheropod forelimbs exhibit wide morphological disparity, from the elongated wings of birds to the diminutive arms of T. rex. A wealth of work has sought to understand the evolution of bird flight via arm elongation, but despite widespread occurrences of ...
Amelia Mead +2 more
doaj +2 more sources
Obligate faunivorous megatheropod size class patterns across the Jurassic-Cretaceous Periods [PDF]
PeerJAllosauroidea, Ceratosauria, Megalosauroidea, Megaraptora, and Tyrannosauroidea are five clades containing obligate faunivorous megatheropods. These clades included apex predators from the Early Jurassic until the end of the Cretaceous Period.
Colin Boisvert +5 more
doaj +3 more sources
Shake a tail feather: the evolution of the theropod tail into a stiff aerodynamic surface. [PDF]
PLoS ONE, 2013 Theropod dinosaurs show striking morphological and functional tail variation; e.g., a long, robust, basal theropod tail used for counterbalance, or a short, modern avian tail used as an aerodynamic surface.
Michael Pittman +4 more
doaj +6 more sources
Enhancing the classification of isolated theropod teeth using machine learning: a comparative study [PDF]
PeerJClassifying objects, such as taxonomic identification of fossils based on morphometric variables, is a time-consuming process. This task is further complicated by intra-class variability, which makes it ideal for automation via machine learning (ML ...
Carolina S. Marques +4 more
doaj +3 more sources
Latest Cretaceous megaraptorid theropod dinosaur sheds light on megaraptoran evolution and palaeobiology [PDF]
Nature CommunicationsRecent fossil discoveries have cast considerable light on the palaeobiology of Megaraptora, a group of large-clawed carnivorous theropod dinosaurs known from Cretaceous deposits in Asia, Australia, and especially South America.
Lucio M. Ibiricu +7 more
doaj +2 more sources
Dinosaur teeth from the Lower Cretaceous Jiufotang Formation of western Liaoning, China [PDF]
PeerJHere, two dinosaur teeth are discovered from the Lower Cretaceous Jiufotang Formation in Longcheng, Chaoyang, western Liaoning, China. This discovery marks a new fossil site for the Jehol Biota, characterized by three-dimensionally preserved fossils ...
Ya-Lei Yin +3 more
doaj +3 more sources
Dinosaur footprints and other Ichnofauna from the Cretaceous Kem Kem Beds of Morocco [PDF]
, 2014 We describe an extensive ichnofossil assemblage from the likely Cenomanian-age 'lower' and 'upper' units of the 'Kem Kem beds' in southeastern Morocco.
Baidder, Lahssen +7 more
core +19 more sources
Rare evidence for ‘gnawing-like’ behavior in a small-bodied theropod dinosaur [PDF]
PeerJ, 2021 Mammalian carnivores show a higher degree of prey bone utilization relative to non-avian theropod dinosaurs, with this major ecological difference reflected in the frequency and morphology of tooth marks in modern and Cenozoic assemblages relative to ...
Caleb M. Brown +2 more
doaj +2 more sources
Late Jurassic theropod dinosaur bones from the Langenberg Quarry (Lower Saxony, Germany) provide evidence for several theropod lineages in the central European archipelago [PDF]
PeerJ, 2020 Marine limestones and marls in the Langenberg Quarry provide unique insights into a Late Jurassic island ecosystem in central Europe. The beds yield a varied assemblage of terrestrial vertebrates including extremely rare bones of theropod from theropod ...
Serjoscha W. Evers, Oliver Wings
doaj +2 more sources
Geogaceta, 2021 Three types of ichnites from a new site discovered in Imilchil were studied and described. The structures of pes and manus prints and tail traces of tetrapods provide data to separate: real ichnites (theropod footprints and crocodile tail drag marks ...
Moussa Masrour +5 more
doaj +1 more source