Results 171 to 180 of about 2,952 (213)

Crouching theropod at the seaside. Matching footprints with metatarsal impressions and theropod authopods: a morphometric approach

Geological Magazine, 2016
AbstractWe compare theropod footprints with elongate metatarsal prints from central Italy with known autopod structures in major theropod groups, in order to more accurately define the trackmaker attribution. Our work, using morphometric analysis, shows the considerable potential of explorative methods such as PCA (principal component analysis) and ...
Romano, Marco, Citton, Paolo
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The Early History of Theropods

Short Courses in Paleontology, 1989
Theropods have traditionally been portrayed as extinct bipedal predators built along the lines of such celebrated terrors as Tyrannosaurus, Deinonychus, and Allosaurus. The earliest theropods indeed fit that image, and all of them are decidedly extinct.
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Theropod Dinosaurs of the Cretaceous

Short Courses in Paleontology, 1989
Tyrannosaurus rex is unquestionably the most famous dinosaur, probably because of its awesome size and appearance, and its apparent strength, agility and prowess. In spite of its fame, the anatomy and relationships of Tyrannosaurus and its kin remain poorly understood. By Late Cretaceous times (about 65 to 100 million years ago), carnivorous dinosaurs (
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Uncertain Averaptoran Theropods

2013
Several theropods have been briefly described and assigned to the clade Dromaeosauridae. However, some of these taxa may be excluded from such theropod group, based on several osteological features. Regrettably, most of these taxa were only briefly described, or are rather fragmentary, and consequently a complete cladistic analysis is beyond the ...
Federico L. Agnolín, Fernando E. Novas
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Fibular reduction and the evolution of theropod locomotion

Nature
Since Hampé's classic developmental experiments in the mid-twentieth century1,2, the reduced avian fibula has sparked sustained curiosity3-6. The fibula transformed throughout dinosaur evolution from a columnar structure into its splint-like avian form, a change long thought to be of little biomechanical consequence3,6.
Armita R. Manafzadeh, Stephen M. Gatesy, John A. Nyakatura, Bhart-Anjan S. Bhullar   +3 more
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Binocular vision in theropod dinosaurs

Journal of Vertebrate Paleontology, 2006
ABSTRACT The binocular fields of view of seven theropod dinosaurs are mapped using sculpted life reconstructions of their heads and techniques adopted from ophthalmic field perimetry. The tall, narrow snout and laterally facing eyes of the allosauroids Allosaurus and Carcharodontosaurus restricted binocular vision to a region only approximately 20 ...
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Theropods

2022
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Theropod Locomotion1

American Zoologist, 2000
James O. Farlow, Stephen M. Gatesy, Thomas R. Holtz, Jr., John R. Hutchinson, John M. Robinson   +4 more
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Theropods Down Under: Revisions of the Australian theropod fauna and the earliest known megaraptorids

Theropoda is a group of globally distributed dinosaurs that includes all strictly carnivorous dinosaurs and their only living relatives, the birds. The Australian fossil record of non-avian theropods mostly comprises isolated specimens that shed some light on diversity and biogeography.
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First application of dental microwear texture analysis to infer theropod feeding ecology

Palaeontology, 2022
Daniela E Winkler, Mugino O. Kubo, Thomas M. Kaiser   +2 more
exaly