Results 71 to 80 of about 5,330 (201)

1. On the structural characters of the Dinosauria [PDF]

open access: yesProceedings of the Geologists' Association, 1871
n ...
openaire   +2 more sources

Notice of new American Dinosauria [PDF]

open access: yesAmerican Journal of Science, 1889
n ...
openaire   +2 more sources

A new Heterodontosaurus specimen elucidates the unique ventilatory macroevolution of ornithischian dinosaurs

open access: yeseLife, 2021
Ornithischian dinosaurs were ecologically prominent herbivores of the Mesozoic Era that achieved a global distribution by the onset of the Cretaceous. The ornithischian body plan is aberrant relative to other ornithodiran clades, and crucial details of ...
Viktor J Radermacher   +8 more
doaj   +1 more source

Macroevolutionary patterns in cranial and lower jaw shape of ceratopsian dinosaurs (dinosauria, ornithischia). phylogeny, morphological integration, and evolutionary rates [PDF]

open access: yes, 2017
Organisms: Ceratopsians were herbivorous, beaked dinosaurs, ranging from 1 m to 9 m in body length, usually four-footed, and with a bony frill that extended backwards from the cranium over the nape of the neck. Known from Asia, Europe, and North America,
Farke, Aa   +3 more
core  

Bone labeling experiments and intraskeletal growth patterns in captive leopard geckos (Eublepharis macularius)

open access: yesJournal of Anatomy, Volume 247, Issue 3-4, Page 542-555, September/October 2025.
In this study, we used fluorochrome labels in captive leopard geckos (Eublepharis macularius) to track bone growth and intraskeletal variability from embryonic to adult growth stages. Overall, the tibia in leopard geckos is the least reliable limb bone to use for skeletochronology and the humerus, radius, and fibula preserve the longest growth record ...
Sierra C. Schlief   +2 more
wiley   +1 more source

II.—On the Families of Sauropodous Dinosauria [PDF]

open access: yesGeological Magazine, 1899
The subclass Dinosauria, as known to-day, I have divided into three orders: the Theropoda, or carnivorous forms; the Sauropoda, or herbivorous quadrupedal forms; and the Predentata, also herbivorous, and including several suborders, namely, the Stegosauria and Ceratopsia, both quadrupedal, and the Ornithopoda, containing bipedal bird-like reptiles.
openaire   +2 more sources

Preliminary observations on the bone histology of the Middle Triassic pseudosuchian archosaur Batrachotomus kupferzellensis reveal fast growth with laminar fibrolamellar bone tissue [PDF]

open access: yes, 2017
The bone tissue of femur, rib, and gastralia from three different individuals of the Middle Triassic pseudosuchian Batrachotomus kupferzellensis from southern Germany is studied.
Foth, Christian   +2 more
core   +1 more source

A proposed terminology of theropod teeth (Dinosauria, Saurischia) [PDF]

open access: yesJournal of Vertebrate Paleontology, 2015
ABSTRACTTheropod teeth are typically not described in detail, yet these abundant vertebrate fossils are not only frequently reported in the literature, but also preserve extensive anatomical information. Often in descriptions, important characters of the crown and ornamentations are omitted, and in many instances, authors do not include a description ...
Christophe Hendrickx   +2 more
openaire   +2 more sources

A re-evaluation of the enigmatic dinosauriform Caseosaurus crosbyensis from the Late Triassic of Texas, USA and its implications for early dinosaur evolution [PDF]

open access: yesActa Palaeontologica Polonica, 2018
The holotype specimen of the Late Triassic dinosauriform Caseosaurus crosbyensis is redescribed and evaluated phylogenetically for the first time, providing new anatomical information and data on the earliest dinosaurs and their evolution within the ...
Matthew G. Baron, Megan E. Williams
doaj   +1 more source

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

open access: yes, 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.
Canudo, J.I.   +6 more
core   +4 more sources

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