Results 31 to 40 of about 478 (130)

Cranial ontogenetic variation in early saurischians and the role of heterochrony in the diversification of predatory dinosaurs [PDF]

open access: yes, 2016
Non-avian saurischian skulls underwent at least 165 million years of evolution and shapes varied from elongated skulls, such as in the theropod Coelophysis, to short and box-shaped skulls, such as in the sauropod Camarasaurus.
Ezcurra, Martin D.   +2 more
core   +4 more sources

The Mystery of the Triceratops's Mother: How to be a realist about the species category. [PDF]

open access: yes, 2016
Can we be realists about a general category but pluralists about concepts relating to that category? I argue that paleobiological methods of delineating species are not affected by differing species concepts, and that this underwrites an argument that ...
Currie, Adrian
core   +2 more sources

A survey of dinosaur diversity by clade, age, place of discovery and year of description [PDF]

open access: yes, 2014
Dinosaur diversity is analyzed in terms of the number of valid genera within each major clade, Mesozoic age, place of discovery and year of description. Aves (Archaeopteryx + Neornithes) is excluded. Nomina nuda and nomina dubia are not counted.
Taylor, Michael
core   +3 more sources

The Mystery of the Triceratops’s Mother: How to be a Realist About the Species Category [PDF]

open access: yes, 2019
This is the author accepted manuscript. The final version is available from Springer via the DOI in this record.Can we be realists about a general category but pluralists about concepts relating to that category?
Currie, AM
core   +1 more source

Ontogenetic Niche Shifts in Megaherbivorous Dinosaurs of Late Cretaceous North America and their Ecological Implications [PDF]

open access: yes, 2020
Despite megaherbivore ontogeny being relatively well-studied, little research has been conducted on the ecological implications of growth stages. Using ecomorphological dietary correlates, investigations into potential ecological differences between ...
Wyenberg-Henzler, Taia Constance Alexis
core   +2 more sources

Stratigraphic Reassessment of the Mexican Chasmosaurine Coahuilaceratops magnacuerna as the First Diagnostic Dinosaur Remains from the Cerro Huerta Formation (Lower Maastrichtian) Supporting the Southern Origin of the Triceratopsini

open access: yesDiversity
Very few remains of ceratopsid dinosaurs have been recovered so far from the Difunta Group of Coahuila, Mexico. The enigmatic chasmosaurine Coahuilaceratops magnacuerna was previously described on the basis of two partial skulls purportedly derived from ...
Daniela Barrera Guevara   +6 more
doaj   +1 more source

Ontogeny in the tube-crested dinosaur Parasaurolophus (Hadrosauridae) and heterochrony in hadrosaurids [PDF]

open access: yes, 2013
The tube-crested hadrosaurid dinosaur Parasaurolophus is remarkable for its unusual cranial ornamentation, but little is known about its growth and development, particularly relative to well-documented ontogenetic series for lambeosaurin hadrosaurids ...
Andrew A. Farke   +4 more
core   +1 more source

Nasal soft‐tissue anatomy of Triceratops and other horned dinosaurs

open access: yesThe Anatomical Record, EarlyView.
Abstract Although ceratopsid dinosaurs possess a characteristically hypertrophied narial region, soft‐tissue anatomy associated with such a skeletal structure and their biological significance remain poorly understood. The present study provides the first comprehensive hypothesis on the soft‐tissue anatomy in the ceratopsid rostrum based on the Extant ...
Seishiro Tada   +5 more
wiley   +1 more source

Diet of bird‐like troodontid dinosaurs: synthesis of a contentious clade

open access: yesBiological Reviews, EarlyView.
ABSTRACT Troodontidae is a clade of small‐to medium‐sized maniraptoran theropods that mainly lived in Laurasia (modern Asia, North America and Europe) during the Jurassic and Cretaceous periods and are believed to have had a variety of diets. The uniqueness of troodontid teeth suggests that they diverged from the typical flesh‐based diet of non‐avian ...
Yui Chi Fan   +2 more
wiley   +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  

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