Results 41 to 50 of about 201 (129)

An overview of the appendicular skeletal anatomy of South American titanosaurian sauropods, with definition of a newly recognized clade

Anais da Academia Brasileira de Ciências
: In the last two decades, the number of phylogenetically informative anatomical characters recognized in the appendicular skeleton of titanosaurian sauropod dinosaurs has increased dramatically with the discovery of new and comparatively complete ...
BERNARDO J. GONZÁLEZ RIGA, MATTHEW C. LAMANNA, ALEJANDRO OTERO, LEONARDO D. ORTIZ DAVID, ALEXANDER W.A. KELLNER, LUCIO M. IBIRICU   +5 more
doaj   +1 more source

A new titanosaurian sauropod from the Hekou Group (Lower Cretaceous) of the Lanzhou-Minhe Basin, Gansu Province, China. [PDF]

PLoS ONE, 2014
Increased excavation of dinosaurs from China over the last two decades has enriched the record of Asian titanosauriform sauropods. However, the relationships of these sauropods remain contentious, and hinges on a few well-preserved taxa, such as ...
Li-Guo Li, Da-Qing Li, Hai-Lu You, Peter Dodson   +3 more
doaj   +1 more source

How femoral morphology informs our understanding of the evolution of ornithopod locomotion and body size

Palaeontology, Volume 68, Issue 4, July/August 2025.
Abstract Ornithopoda is one of the three main ornithischian dinosaur clades in which secondary quadrupedality is represented. However, when it evolved from obligate bipedality remains controversial. Indeed, the ability to alternate between the two habits was inferred in some ornithopods based on ichnological observations and a mosaic of bipedal and ...
Romain Pintore, Alexandra Houssaye, John R. Hutchinson   +2 more
wiley   +1 more source

Standing giants: a digital biomechanical model for bipedal postures in sauropod dinosaurs

Palaeontology, Volume 68, Issue 4, July/August 2025.
ABSTRACT Here we explore the potential of sauropod dinosaurs to adopt a bipedal or tripodal stance using digital biomechanical modelling and finite element analysis (FEA). Seven sauropod species from diverse lineages and sizes were sampled, and 3D models of their femora were analysed under both extrinsic (body weight distribution) and intrinsic ...
Julian C. G. Silva Junior, Gabriel S. Ferreira, Agustín G. Martinelli, Thiago S. Marinho, Felipe C. Montefeltro   +4 more
wiley   +1 more source

Small body size and extreme cortical bone remodeling indicate phyletic dwarfism in Magyarosaurus dacus (Sauropoda: Titanosauria) [PDF]

Proceedings of the National Academy of Sciences, 2010
Sauropods were the largest terrestrial tetrapods (>10 5 kg) in Earth's history and grew at rates that rival those of extant mammals. Magyarosaurus dacus , a titanosaurian sauropod from the Upper Cretaceous (Maastrichtian) of Romania, is known ...
Stein, Koen, Csiki, Zoltan, Curry-Rogers, Kristy, Weishampel, David, Redelstorff, Ragna, Carballido, Jose, Sander, Paul Martin   +6 more
openaire   +4 more sources

Description of a new specimen of Haplocanthosaurus from the Dry Mesa Dinosaur Quarry

The Anatomical Record, Volume 307, Issue 12, Page 3782-3800, December 2024.
Abstract A new specimen of Haplocanthosaurus is described based on bones excavated from the Late Jurassic Dry Mesa Dinosaur Quarry near Delta, Colorado. The specimen consists of seven dorsal vertebrae and a right tibia and is identified as Haplocanthosaurus based on the dorsally angled transverse processes, tall neural arch peduncles, low parapophyses ...
Colin Boisvert, Brian Curtice, Mathew Wedel, Ray Wilhite   +3 more
wiley   +1 more source

Revealing the use of dental indices to infer taxonomic variation in sauropod dinosaurs

Palaeontology, Volume 67, Issue 5, September/October 2024.
Abstract Sauropod teeth are commonly categorized taxonomically by two well‐established measurement indices: slenderness index (SI; apicobasal height/mesiodistal width), which quantifies breadth, and compression index (CI; labiolingual width/mesiodistal width), which quantifies cross‐sectional circularity.
Timothy G. Frauenfelder, Sienna A. Birch, Phil R. Bell, Nicolás E. Campione   +3 more
wiley   +1 more source

Redescription ofBonatitan reigi(Sauropoda: Titanosauria), from the Campanian–Maastrichtian of the Río Negro Province (Argentina)

Historical Biology, 2014
The titanosaur sauropod Bonatitan reigi is redescribed. The material collected, originally interpreted as pertaining to two different individuals, is reorganised in five individuals, and the original type specimen is separated into three different individuals. One of the braincases is designated as a new type specimen.
Salgado, Leonardo, Gallina, Pablo Ariel, Paulina Carabajal, Ariana   +2 more
openaire   +2 more sources

A new sauropod titanosaur from the Plottier Formation (Upper Cretaceous) of Patagonia (Argentina)

Geologica Acta, 2011
This paper presents a new titanosaur sauropod, collected from levels of reddish clays assigned to the Plottier Formation (Coniacian-Santonian). The holotype of Petrobrasaurus puestohernandezi gen. et. sp. nov.
L.S. FILIPPI, J.I. CANUDO, J.L. SALGADO, A. GARRIDO, R. GARCÍA, I.A. CERDA, A. OTERO   +6 more
doaj  

SAUROPOD DIVERSITY (DINOSAURIA: SAUROPODA) OF CERRO OVERO – LA INVERNADA (BAJO DE LA CARPA FORMATION, SANTONIAN), NORTHEASTERN NEUQUÉN BASIN, AND PALEOECOLOGICAL IMPLICATIONS FOR UPPER CRETACEOUS SAUROPOD FAUNAS

Publicación Electrónica de la Asociación Paleontológica Argentina
The Upper Cretaceous fossil vertebrate fauna of the Bajo de la Carpa Formation (Santonian), derived from several different locations in the Neuquén Basin, is relatively abundant and diverse, comprising mainly small to medium-sized reptiles, birds and ...
Leonardo Sebastián Filippi, Flavio Bellardini, José Luis Carballido, Agustín Pérez-Moreno, Alberto Carlos Garrido   +4 more
doaj   +1 more source