Results 91 to 100 of about 97,949 (319)

A virtual world of paleontology.

open access: yesTrends in Ecology & Evolution, 2014
Computer-aided visualization and analysis of fossils has revolutionized the study of extinct organisms. Novel techniques allow fossils to be characterized in three dimensions and in unprecedented detail. This has enabled paleontologists to gain important
John A. Cunningham   +4 more
semanticscholar   +1 more source

A detailed redescription of a skeletally immature ‘Redondasaurus’ suggests ontogenetic transformations in the taxon mirror phytosaurian morphological evolution

open access: yesThe Anatomical Record, EarlyView.
Abstract The study of morphological evolution is fundamentally tied to ontogeny, yet studies of these heterochronic processes in the fossil record are rare. Fossils belonging to an ontogenetic series are difficult to assign to an ontogenetic stage due to inconsistent proxies for skeletal ages, challenging to taxonomically assign due to morphological ...
Erika R. Goldsmith, Michelle R. Stocker
wiley   +1 more source

EXTINCTION EVENTS AND THEIR GEOLOGICAL MARKERS IN BANGLADESH: A RESEARCH ARTICLE OUTLINE [PDF]

open access: yesGeological Behavior
Extinction events have played a pivotal role in shaping Earth’s biological and geological history, often leaving behind distinct markers in sedimentary and fossil records.
Hasib Mahmud
doaj   +1 more source

The postcranial skeleton of Monolophosaurus jiangi (Dinosauria: Theropoda) from the Middle Jurassic of Xinjiang, China, and a review of Middle Jurassic Chinese theropods [PDF]

open access: yes, 2010
The Middle Jurassic was a critical time in the evolution of theropod dinosaurs, highlighted by the origination and radiation of the large-bodied and morphologically diverse Tetanurae.
ZHAO XI-JIN   +34 more
core   +1 more source

Skeletal pathologies in extant crocodilians as a window into the paleopathology of fossil archosaurs

open access: yesThe Anatomical Record, EarlyView.
Abstract Crocodilians, together with birds, are the only extant relatives to many extinct archosaur groups, making them highly important for interpreting paleopathological conditions in a phylogenetic disease bracketing model. Despite this, comprehensive data on osteopathologies in crocodilians remain scarce.
Alexis Cornille   +6 more
wiley   +1 more source

Problems of chronology of the “upper complex” of the Sukhotino-4 Paleolithic site (Eastern Transbaikalia): geological, geomorphological, and paleontological aspects [PDF]

open access: yesВестник археологии, антропологии и этнографии
Currently, the most debated issues concerning the Sukhotino-4 site pertain to the integrity of its archaeologi-cal complexes and the conflicting radiocarbon dates obtained for cultural layers 1–3, which are grouped into the so-called “upper complex ...
Filatov E.A.   +2 more
doaj   +1 more source

A taxonomic revision of geoemydid turtles from Siwalik-age of India and Pakistan

open access: yesEuropean Journal of Taxonomy, 2020
Neogene (Siwalik-aged) deposits from India and Pakistan have yielded many vertebrate fossils, of which most were named during the 19th century, including numerous geoemydid turtles.
Rafaella C. Garbin   +2 more
doaj   +1 more source

The Fossil higher plants from the Canal Zone [PDF]

open access: yes, 1918
Fossil flora described in the present report is too limited for purposes of exact correlation, which may be expected to be settled by the marine faunas present at most horizons in the Isthmian region.
Berry, Edward W.
core  

Primer registro de Scelidotheriinae Ameghino (Xenartha, Mylodontidae) del Piso/Edad Chasiquense (Mioceno tardío) de la Argentina [PDF]

open access: yes, 2014
The subfamily Scelidotheriinae constitutes a group of mylodontids widely represented in the Quaternary of South America; however, the fossil record of the Neogene taxa is still scarce. In the present paper, a new specimen of this subfamily, corresponding
Contreras, Victor Hugo   +2 more
core   +1 more source

New craniodental materials of Falcarius utahensis (Theropoda: Therizinosauria) reveal patterns of intraspecific variation and cranial evolution in early coelurosaurians

open access: yesThe Anatomical Record, EarlyView.
Abstract Despite documented ecomorphological shifts toward an herbivorous diet in several coelurosaurian lineages, the evolutionary tempo and mode of these changes remain poorly understood, hampered by sparse cranial materials for early representatives of major clades. This is particularly true for Therizinosauria, with representative crania best known
William J. Freimuth, Lindsay E. Zanno
wiley   +1 more source

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