Results 1 to 10 of about 1,623 (162)

Forelimb reduction and digit loss were evolutionarily decoupled in oviraptorosaurian theropod dinosaurs [PDF]

open access: yesRoyal Society Open Science
Theropod 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

Enhancing the classification of isolated theropod teeth using machine learning: a comparative study [PDF]

open access: yesPeerJ
Classifying 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]

open access: yesNature Communications
Recent 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]

open access: yesPeerJ
Here, 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

Rare evidence for ‘gnawing-like’ behavior in a small-bodied theropod dinosaur [PDF]

open access: yesPeerJ, 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]

open access: yesPeerJ, 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

Crocodile tail traces and dinosaur footprints. Bathonian?- Callovian. Imilchil. High Central Atlas. Morocco

open access: yesGeogaceta, 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

The largest European theropod dinosaurs: remains of a gigantic megalosaurid and giant theropod tracks from the Kimmeridgian of Asturias, Spain [PDF]

open access: yesPeerJ, 2018
The Kimmeridgian Vega, Tereñes and Lastres formations of Asturias have yielded a rich vertebrate fauna, represented by both abundant tracks and osteological remains.
Oliver W.M. Rauhut   +4 more
doaj   +2 more sources

Abelisauroidea (Theropoda, Dinosauria) from Africa: a review of the fossil record [PDF]

open access: yesPapéis Avulsos de Zoologia, 2023
The Continental African abelisauroid theropod dinosaur fossil record from the Jurassic-Cretaceous periods is becoming increasingly better understood, and offers great insight into the evolution and biogeography of this long-lived group of carnivores ...
André Luis de Souza-Júnior   +4 more
doaj   +1 more source

Review of the Dinosaur Remains from the Middle Jurassic of Scotland, UK

open access: yesGeosciences, 2018
Dinosaurs are rare from the Middle Jurassic worldwide. The Isle of Skye, is the only place in Scotland thus far to have produced dinosaur remains. These remains consist mainly of footprints, but also several bones and teeth.
Neil D. L. Clark
doaj   +1 more source

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