Results 41 to 50 of about 5,144 (213)
Why sauropods had long necks; and why giraffes have short necks [PDF]
, 2012 The necks of the sauropod dinosaurs reached 15 m in length: six times longer than that of the world record giraffe and five times longer than those of all other terrestrial animals.
Taylor, Michael P., Wedel, Mathew J.
core +5 more sources
Sauropod diversity in the Upper Cretaceous Nemegt Formation of Mongolia—a possible new specimen of Nemegtosaurus [PDF]
Acta Palaeontologica Polonica, 2019 Currently, there are two sauropod taxa known from the Upper Cretaceous (Maastrichtian) Nemegt Formation of Gobi Desert, Mongolia: Nemegtosaurus from the Nemegt locality and Opisthocoelicaudia from the Altan Uul IV locality.
Alexander O. Averianov +1 more
doaj +1 more source
Morphometric Analysis of Dinosaur Tracks from Southwest Arkansas [PDF]
, 2013 Dinosaur trackways were discovered in Cretaceous De Queen Limestone strata in Howard County, Arkansas, in June 2011. Multiple trackways with variably sized tridactyl tracks were exposed in a commercial quarry, suggesting multiple theropod species or ...
Boss, Stephen K., Shell, R.
core +3 more sources
Diversity, 2021 The Late Triassic (Norian) outcrops of the Malmros Klint Formation, Jameson Land (Greenland) have yielded numerous specimens of non-sauropod sauropodomorphs.
Victor Beccari +4 more
doaj +1 more source
Limb-Bone Scaling Indicates Diverse Stance and Gait in Quadrupedal Ornithischian Dinosaurs [PDF]
, 2012 Background The most primitive ornithischian dinosaurs were small bipeds, but quadrupedality evolved three times independently in the clade. The transition to quadrupedality from bipedal ancestors is rare in the history of terrestrial vertebrate ...
Barrett, PM +3 more
core +1 more source
The Anatomical Record, EarlyView.Abstract Dinosaurs evolved a unique respiratory system with air sacs that contributed to their evolutionary success. Postcranial skeletal pneumaticity (PSP) has been used to infer the presence of air sac systems in some fossil archosaurs. While unambiguous evidence of PSP is well documented in pterosaurs and post‐Carnian saurischians, it remains absent
Tito Aureliano +3 more
wiley +1 more source
PLoS ONE, 2015 The early Middle Jurassic is regarded as the period when sauropods diversified and became major components of the terrestrial ecosystems. Not many sites yield sauropod material of this time; however, both cranial and postcranial material of eusauropods ...
Femke M Holwerda +2 more
doaj +1 more source
The earliest known titanosauriform sauropod dinosaur and the evolution of Brachiosauridae [PDF]
PeerJ, 2017 Brachiosauridae is a clade of titanosauriform sauropod dinosaurs that includes the well-known Late Jurassic taxa Brachiosaurus and Giraffatitan. However, there is disagreement over the brachiosaurid affinities of most other taxa, and little consensus ...
Philip D. Mannion +2 more
doaj +2 more sources
A quantitative evaluation of physical and digital approaches to centre of mass estimation [PDF]
, 2017 Centre of mass is a fundamental anatomical and biomechanical parameter. Knowledge of centre of mass is essential to inform studies investigating locomotion and other behaviours, through its implications for segment movements, and on whole body factors ...
Alexander +53 more
core +1 more source
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 +5 more
wiley +1 more source