Results 31 to 40 of about 4,654 (162)

Theropod tracks from the Upper Jurassic Dongxing formation Dongxing city and an overview of dinosaur assemblages from Guangxi, China

open access: yesEarth History and Biodiversity
Guangxi Zhuang Autonomous Region is an important region for dinosaur fossil discoveries in southern China, but its Jurassic dinosaur record remains relatively sparse.
Lida Xing   +7 more
doaj   +1 more source

First dinosaur tracks from the Açu Formation, Potiguar Basin (mid-Cretaceous of Brazil)

open access: yesAnais da Academia Brasileira de Ciências, 2021
We record a new ichnosite bearing dinosaur tracks from the mid-Cretaceous (Aptian? -Cenomanian) of Brazil. The Fazenda dos Pingos ichnosite is situated within a sandstone pavement of the Açu Formation (Açu 3 unit) from the Potiguar Basin in the State of ...
GIUSEPPE LEONARDI   +2 more
doaj   +1 more source

Osteohistology reveals the smallest adult Jurassic sauropodomorph

open access: yesRoyal Society Open Science, 2023
The earliest sauropodomorphs were small omnivores (less than 10 kg) that first appeared in the Carnian. By the Hettangian, early branching sauropodomorphs (EBSMs) were globally distributed, had variable postures, and some attained large body masses ...
Kimberley E. J. Chapelle   +2 more
doaj   +1 more source

Maiasaura (Dinosauria: Hadrosauridae) Tibia Osteohistology Reveals Non-annual Cortical Vascular Rings in Young of the Year

open access: yesFrontiers in Earth Science, 2019
Annually, tetrapod vertebrate bone apposition is briefly interrupted, which typically coincides with the yearly environmental nadir. The temporary appositional hiatus is histologically recorded in bone cortex as a hypermineralized ring termed a line of ...
Holly N. Woodward
doaj   +1 more source

Dinosaurs [PDF]

open access: yesCurrent Biology, 2009
David E. Fastovsky, David B. Weishampel
  +5 more sources

A Comparison of the Dinosaur Communities from the Middle Jurassic of the Cleveland (Yorkshire) and Hebrides (Skye) Basins, Based on Their Ichnites

open access: yesGeosciences, 2018
Despite the Hebrides and Cleveland basins being geographically close, research has not previously been carried out to determine faunal similarities and assess the possibility of links between the dinosaur populations.
Mike Romano   +2 more
doaj   +1 more source

A long-forgotten ‘dinosaur’ bone from a museum cabinet, uncovered to be a Japan's iconic extinct mammal, Paleoparadoxia (Desmostylia, Mammalia) [PDF]

open access: yesRoyal Society Open Science, 2018
Here, we report a new ‘discovery’ of a desmostylian fossil in the geological collection at a national university in Japan. This fossil was unearthed over 60 years ago and donated to the university.
Kumiko Matsui   +11 more
doaj   +1 more source

Intelligent Objective Osteon Segmentation Based on Deep Learning

open access: yesFrontiers in Earth Science, 2022
Histology is key to understand physiology, development, growth and even reproduction of extinct animals. However, the identification and interpretation of certain structures, such as osteons, medullary bone (MB), and Lines of Arrested Growth (LAGs), are ...
Zichuan Qin   +4 more
doaj   +1 more source

Modularity and heterochrony in the evolution of the ceratopsian dinosaur frill

open access: yesEcology and Evolution, 2020
The fossil record provides compelling examples of heterochrony at macroevolutionary scales such as the peramorphic giant antlers of the Irish elk.
Albert Prieto‐Márquez   +4 more
doaj   +1 more source

PROSPECTS FOR THE DEVELOPMENT OF GEOTOURISM IN THE ATYRAU REGION OF THE REPUBLIC OF KAZAKHSTAN [PDF]

open access: yesGeo Journal of Tourism and Geosites
Paleontology, being one of the branches of geology, is a scientific discipline that helps to understand the evolution of life on Earth. The dissemination of information about paleontology is currently based on fossil finds and descriptions of their ...
Jamilya B. YAKUPOVA*   +1 more
doaj   +1 more source

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