Results 41 to 50 of about 4,308 (203)

Theropod forelimb design and evolution [PDF]

open access: yesZoological Journal of the Linnean Society, 2000
Abstract We examined the relationship between forelimb design and function across the 230-million-year history of theropod evolution. Forelimb disparity was assessed by plotting the relative contributions of the three main limb elements on a ternary diagram.
KEVIN M. MIDDLETON, STEPHEN M. GATESY
openaire   +2 more sources

Why sauropods had long necks; and why giraffes have short necks [PDF]

open access: yes, 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

New insights into non-avian dinosaur reproduction and their evolutionary and ecological implications: linking fossil evidence to allometries of extant close relatives.

open access: yesPLoS ONE, 2013
It has been hypothesized that a high reproductive output contributes to the unique gigantism in large dinosaur taxa. In order to infer more information on dinosaur reproduction, we established allometries between body mass and different reproductive ...
Jan Werner, Eva Maria Griebeler
doaj   +1 more source

The oldest ceratosaurian (Dinosauria: Theropoda), from the Lower Jurassic of Italy, sheds light on the evolution of the three-fingered hand of birds [PDF]

open access: yesPeerJ, 2018
The homology of the tridactyl hand of birds is a still debated subject, with both paleontological and developmental evidence used in support of alternative identity patterns in the avian fingers.
Cristiano Dal Sasso   +2 more
doaj   +2 more sources

A Comparison of the Dinosaur Communities from the Middle Jurassic of the Cleveland (Yorkshire) and Hebrides (Skye) Basins, Based on Their Ichnites

open access: yesGeosciences, 2018
Despite the Hebrides and Cleveland basins being geographically close, research has not previously been carried out to determine faunal similarities and assess the possibility of links between the dinosaur populations.
Mike Romano   +2 more
doaj   +1 more source

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

open access: yes, 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.   +4 more
core   +1 more source

Osteology of the unenlagiid theropod Neuquenraptor argentinus from the Late Cretaceous of Patagonia [PDF]

open access: yes, 2017
Neuquenraptor argentinus was described as the first undoubted deinonychosaurian theropod from Gondwana. The only known specimen is represented by a fragmentary skeleton, including a nearly complete foot, coming from Late Cretaceous beds of Neuquén ...
Agnolin, Federico   +3 more
core   +2 more sources

Flapping before Flight: High Resolution, Three-Dimensional Skeletal Kinematics of Wings and Legs during Avian Development. [PDF]

open access: yesPLoS ONE, 2016
Some of the greatest transformations in vertebrate history involve developmental and evolutionary origins of avian flight. Flight is the most power-demanding mode of locomotion, and volant adult birds have many anatomical features that presumably help ...
Ashley M Heers   +3 more
doaj   +1 more source

Allosaurus europaeus (Theropoda: Allosauroidea) Revisited and Taxonomy of the Genus

open access: yesDiversity
Allosaurus is one of the most famous theropod dinosaurs, but the validity and relationships between the different species have been confusing and often questioned.
André Burigo, Octávio Mateus
doaj   +1 more source

Aerodynamics Show Membrane-Winged Theropods Were a Poor Gliding Dead-end

open access: yesiScience, 2020
Summary: The bizarre scansoriopterygid theropods Yi and Ambopteryx had skin stretched between elongate fingers that form a potential membranous wing. This wing is thought to have been used in aerial locomotion, but this has never been tested. Using laser-
T. Alexander Dececchi   +8 more
doaj   +1 more source

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