Results 11 to 20 of about 5,020 (237)

200 years of dinosaur discoveries –a visual portrayal of their geographic and historical origins [PDF]

open access: yesPeerJ
Background The first dinosaur to be formally named was Megalosaurus in 1824. Over the subsequent 200 years more than 1,200 different species of dinosaur have been discovered and named.
Donald M. Henderson
doaj   +3 more sources

A ceratopsid-dominated tracksite from the Dinosaur Park Formation (Campanian) at Dinosaur Provincial Park, Alberta, Canada. [PDF]

open access: yesPLoS ONE
The badlands of Dinosaur Provincial Park (Alberta, Canada) are renowned for the exceptional abundance and diversity of Campanian-aged vertebrate body fossils, especially dinosaurs.
Phil R Bell   +7 more
doaj   +2 more sources

A transitional species of Daspletosaurus Russell, 1970 from the Judith River Formation of eastern Montana [PDF]

open access: yesPeerJ, 2022
Here we describe a new derived tyrannosaurine, Daspletosaurus wilsoni sp. nov., from Judithian strata (~76.5 Ma) intermediate in age between either of the previously described species of this genus. D.
Elías A. Warshaw, Denver W. Fowler
doaj   +2 more sources

A Unique Late Cretaceous dinosaur locality in the Bakony-Balaton Geopark of Hungary (Iharkút, Bakony Mts.) [PDF]

open access: yesGeoconservation Research, 2021
Iharkút is a Late Cretaceous (Santonian) vertebrate-bearing locality in the Bakony Mountains of western Hungary, where productive and continuous paleontological excavations have been carried out in the last twenty years. Fieldwork resulted in a very rich
Gabor Botfalvai   +3 more
doaj   +1 more source

Transitional evolutionary forms in chasmosaurine ceratopsid dinosaurs: evidence from the Campanian of New Mexico [PDF]

open access: yesPeerJ, 2020
Three new chasmosaurines from the Kirtland Formation (~75.0–73.4 Ma), New Mexico, form morphological and stratigraphic intermediates between Pentaceratops (~74.7–75 Ma, Fruitland Formation, New Mexico) and Anchiceratops (~72–71 Ma, Horseshoe Canyon ...
Denver W. Fowler   +1 more
doaj   +2 more sources

New theropod dinosaur from the Lower Cretaceous of Japan provides critical implications for the early evolution of ornithomimosaurs

open access: yesScientific Reports, 2023
Ornithomimosauria consists of the ostrich-mimic dinosaurs, most of which showing cursorial adaptations, that often exhibit features indicative of herbivory.
Soki Hattori   +5 more
doaj   +1 more source

Case study of the convergent evolution in the color patterns in the freshwater bivalves

open access: yesScientific Reports, 2022
The class Bivalvia (phylum Mollusca) is one of the most successful at survival groups of animals with diverse color patterns on their shells, and they are occasionally preserved in the fossil record as residual color patterns.
Kaito Asato   +2 more
doaj   +1 more source

Exceptionally simple, rapidly replaced teeth in sauropod dinosaurs demonstrate a novel evolutionary strategy for herbivory in Late Jurassic ecosystems

open access: yesBMC Ecology and Evolution, 2021
Background Dinosaurs dominated terrestrial environments for over 100 million years due in part to innovative feeding strategies. Although a range of dental adaptations was present in Late Jurassic dinosaurs, it is unclear whether dinosaur ecosystems ...
Keegan M. Melstrom   +2 more
doaj   +1 more source

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

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

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