Results 21 to 30 of about 56,986 (267)

New Bathonian (Middle Jurassic) sauropod remains from the Valtos Formation, Isle of Skye, Scotland [PDF]

open access: yes, 2016
The discovery of a sauropod tooth and a single sauropod footprint from the Valtos Formation supplements our knowledge of these dinosaurs from the Middle Jurassic of the Isle of Skye.
Clark, Neil D.L., Gavin, Patrick
core   +4 more sources

Psittacosaurus houi, a longer snouted psittacosaurid from the Lower Cretaceous Lujiatun Unit of Yixian Formation, China, with the synonymy of the unresolved genus Hongshanosaurus revisited [PDF]

open access: yesPeerJ
The taxonomic validity of some genera and species within Psittacosauridae has been disputed, including that of Hongshanosaurus houi, which has been synonymized with Psittacosaurus lujiatunensis previously.
Asato Ishikawa   +6 more
doaj   +2 more sources

Debating whether Dinosaurs Should be "Cloned" from Ancient DNA to Promote Cooperative Learning in an Introductory Evolution Course [PDF]

open access: yes, 2001
This interactive internet exercise engages students in cooperative library and web research on a controversial topic in science (and ethics), specifically the cloning of extinct forms of life.
Constance Soja, Deborah Huerta
core   +1 more source

A new, transitional centrosaurine ceratopsid from the Upper Cretaceous Two Medicine Formation of Montana and the evolution of the ‘Styracosaurus-line' dinosaurs [PDF]

open access: yesRoyal Society Open Science, 2020
Ceratopsids are among the most ubiquitous dinosaur taxa from the Late Cretaceous terrestrial formations of the Western Interior of North America, comprising two subfamilies, Chasmosaurinae and Centrosaurinae.
John P. Wilson   +2 more
doaj   +1 more source

Digit-only sauropod pes trackways from China - evidence of swimming or a preservational phenomenon? [PDF]

open access: yes, 2016
For more than 70 years unusual sauropod trackways have played a pivotal role in debates about the swimming ability of sauropods. Most claims that sauropods could swim have been based on manus-only or manus-dominated trackways.
C Gierliński   +49 more
core   +4 more sources

Chemistry and Analysis of Organic Compounds in Dinosaurs

open access: yesBiology, 2022
This review provides an overview of organic compounds detected in non-avian dinosaur fossils to date. This was enabled by the development of sensitive analytical techniques.
Mariam Tahoun   +4 more
doaj   +1 more source

Molecular shifts in limb identity underlie development of feathered feet in two domestic avian species

open access: yeseLife, 2016
Birds display remarkable diversity in the distribution and morphology of scales and feathers on their feet, yet the genetic and developmental mechanisms governing this diversity remain unknown.
Eric T Domyan   +13 more
doaj   +1 more source

Morphogenetic mechanism of the acquisition of the dinosaur-type acetabulum [PDF]

open access: yesRoyal Society Open Science, 2018
Understanding morphological evolution in dinosaurs from a mechanistic viewpoint requires the elucidation of the morphogenesis that gave rise to derived dinosaurian traits, such as the perforated acetabulum. In the current study, we used embryos of extant
Shiro Egawa   +3 more
doaj   +1 more source

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

open access: yesRoyal 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   +4 more
doaj   +1 more source

Phylogenetic relationships of the Cretaceous Gondwanan theropods Megaraptor and Australovenator: the evidence afforded by their manual anatomy [PDF]

open access: yes, 2016
General comparisons of the manual elements of megaraptorid theropods are conducted with the aim to enlarge the morphological dataset of phylogenetically useful features within Tetanurae.
Agnolin, Federico   +2 more
core   +1 more source

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