Results 51 to 60 of about 4,369 (218)

The fast and the frugal: Divergent locomotory strategies drive limb lengthening in theropod dinosaurs.

PLoS ONE, 2020
Limb length, cursoriality and speed have long been areas of significant interest in theropod paleobiology, since locomotory capacity, especially running ability, is critical in the pursuit of prey and to avoid becoming prey.
T Alexander Dececchi, Aleksandra M Mloszewska, Thomas R Holtz, Michael B Habib, Hans C E Larsson   +4 more
doaj   +1 more source

Osteological correlates of the respiratory and vascular systems in the neural canals of Mesozoic ornithurines Ichthyornis and Janavis

The Anatomical Record, EarlyView.
Abstract In birds, the neural canal houses a variety of anatomical structures including the spinal cord, meninges, spinal vasculature, and respiratory diverticula. Among these, paramedullary diverticula and the extradural dorsal spinal vein may leave behind osteological correlates in the form of pneumatic foramina and fossae, and a bilobed geometry of ...
Jessie Atterholt, M. Grace Burton, Mathew J. Wedel, Juan Benito, Ellen Fricano, Daniel J. Field   +5 more
wiley   +1 more source

A new carcharodontosaurian theropod dinosaur occupies apex predator niche in the early Late Cretaceous of Uzbekistan

Royal Society Open Science, 2021
Carcharodontosauria is a group of medium to large-sized predatory theropods, distributed worldwide during the Cretaceous. These theropods were probably the apex predators of Asiamerica in the early Late Cretaceous prior to the ascent of tyrannosaurids ...
Kohei Tanaka, Otabek Ulugbek Ogli Anvarov, Darla K. Zelenitsky, Akhmadjon Shayakubovich Ahmedshaev, Yoshitsugu Kobayashi   +4 more
doaj   +1 more source

A reassessment of Kelmayisaurus petrolicus, a large theropod dinosaur from the Early Cretaceous of China [PDF]

, 2012
The Early Cretaceous fossil record of large−bodied theropods from Asia is poor, hindering comparison of Asian predatory dinosaur faunas with those from other continents. One of the few large Asian theropod specimens from this interval is a partial skull (
Allain R., Benson R.B J., Benson R.B.J., Bonaparte J.F., Britt B.B., Brusatte S.L., Brusatte S.L., Brusatte S.L., Brusatte S.L., Buffetaut E., Calvo J.O., Carrano M.T., Charig A.J., Coria R.A., Currie P.J., Currie P.J., Dong Z.-M., Gauthier J., Harris J.D., Hutt S., Madsen J.H., Madsen J.H., Marsh O.C., Marsh O.C., Marsh O.C., Milner A., Norell M.A., Powell H.P., Rauhut O.W.M., Rauhut O.W.M., Rauhut O.W.M., Roger B.J. Benson, Sadleir R.W., Sampson S.D., Stephen L. Brusatte, Stromer E., Xing Xu, Xu X.   +37 more
core   +1 more source

Fast-running theropods tracks from the Early Cretaceous of La Rioja, Spain

Scientific Reports, 2021
Theropod behaviour and biodynamics are intriguing questions that paleontology has been trying to resolve for a long time. The lack of extant groups with similar bipedalism has made it hard to answer some of the questions on the matter, yet theoretical ...
Pablo Navarro-Lorbés, Javier Ruiz, Ignacio Díaz-Martínez, Erik Isasmendi, Patxi Sáez-Benito, Luis Viera, Xabier Pereda-Suberbiola, Angélica Torices   +7 more
doaj   +1 more source

Macroevolutionary patterns in the pelvis, stylopodium and zeugopodium of megalosauroid theropod dinosaurs and their importance for locomotor function

Royal Society Open Science, 2023
During the Mesozoic, non-avian theropods represented one of the most successful clades globally distributed, with a wide diversity of forms. An example is the clade Megalosauroidea, which included medium- to large-bodied forms.
Mauro B. S. Lacerda, Jonathas S. Bittencourt, John R. Hutchinson   +2 more
doaj   +1 more source

Elongated theropod tracks from the Cretaceous Apenninic Carbonate Platform of southern Latium (central Italy) [PDF]

, 2015
New dinosaur footprints were recently discovered in southern Latium (Italy). The tracks all appear slightly differently preserved and are characterized by elongated metatarsal impressions, recording the complex locomotor behaviour of a medium-sized ...
Carluccio, R., CITTON, PAOLO, Nicolosi, I., NICOSIA, Umberto, ROMANO, MARCO   +4 more
core   +1 more source

T. rex cognition was T. rex‐like—A critical outlook on diverging views of the neurocognitive evolution in dinosaurs

The Anatomical Record, EarlyView.
Abstract A recent debate has emerged between Caspar et al. (2024) and Herculano‐Houzel (2023) on inferring extinct dinosaur cognition by estimating brain neuron counts. While thought‐provoking, the discussion largely overlooks the function of cognition, as well as partly neglects the difficulties involved in estimating neuron numbers, which according ...
Thomas Rejsenhus Jensen, Ivo Jacobs, Kristina Kverková, Lona Lalić, Alexandra Polonyiová, Patrik Stehlík, Stephan A. Reber, Mathias Osvath   +7 more
wiley   +1 more source

Ichnological evidence of Megalosaurid Dinosaurs crossing Middle Jurassic tidal flats [PDF]

, 2016
A new dinosaur tracksite in the Vale de Meios quarry (Serra de Aire Formation, Bathonian, Portugal) preserves more than 700 theropod tracks. They are organized in at least 80 unidirectional trackways arranged in a bimodal orientation pattern (W/NW and E ...
Castanera, D., Faria dos Santos, Vanda, Galobart, Àngel, Oms, O., Razzolini, Novella L., Vila Ginestí, Bernat   +5 more
core   +5 more sources

A detailed redescription of a skeletally immature ‘Redondasaurus’ suggests ontogenetic transformations in the taxon mirror phytosaurian morphological evolution

The Anatomical Record, EarlyView.
Abstract The study of morphological evolution is fundamentally tied to ontogeny, yet studies of these heterochronic processes in the fossil record are rare. Fossils belonging to an ontogenetic series are difficult to assign to an ontogenetic stage due to inconsistent proxies for skeletal ages, challenging to taxonomically assign due to morphological ...
Erika R. Goldsmith, Michelle R. Stocker
wiley   +1 more source