Results 21 to 30 of about 49,248 (280)

Spondarthritis in the Triassic

open access: yesPLoS ONE, 2010
The evidence of several forms of arthritis has been well documented in the fossil record. However, for pre-Cenozoic vertebrates, especially regarding reptiles, this record is rather scarce. In this work we present a case report of spondarthritis found in a vertebral series that belonged to a carnivorous archosaurian reptile from the Lower Triassic ...
Juan Carlos Cisneros   +4 more
openaire   +4 more sources

Earliest Triassic microbialites in the South China Block and other areas; controls on their growth and distribution [PDF]

open access: yes, 2007
Earliest Triassic microbialites (ETMs) and inorganic carbonate crystal fans formed after the end-Permian mass extinction (ca. 251.4 Ma) within the basal Triassic Hindeodus parvus conodont zone.
Kershaw, S   +18 more
core   +1 more source

The Khadzhokh Canyon System—An Important Geosite of the Western Caucasus

open access: yesGeosciences, 2020
True diversity of geological heritage sites (geosites) is yet to be fully understood. New field studies of the Khadzhokh Canyon and its vicinities in the Western Caucasus (Mountainous Adygeya tourist destination, southwestern Russia) have allowed ...
Anna V. Mikhailenko   +2 more
doaj   +1 more source

The craniomandibular anatomy of the early archosauriform Euparkeria capensis and the dawn of the archosaur skull [PDF]

open access: yesRoyal Society Open Science, 2020
Archosauria (birds, crocodilians and their extinct relatives) form a major part of terrestrial ecosystems today, with over 10 000 living species, and came to dominate the land for most of the Mesozoic (over 150 Myr) after radiating following the Permian ...
Roland B. Sookias   +7 more
doaj   +1 more source

A Triassic crown squamate

open access: yesScience Advances, 2022
Mammals, birds, and squamates (lizards, snakes, and relatives) are key living vertebrates, and thus understanding their evolution underpins important questions in biodiversity science. Whereas the origins of mammals and birds are relatively well understood, the roots of squamates have been obscure.
Whiteside, David I.   +2 more
openaire   +4 more sources

Ostracods (Crustacea) associated with microbialites across the Permian-Triassic boundary in Dajiang (Guizhou Province, South China) [PDF]

open access: yes, 2012
26 samples were processed for a taxonomic study of ostracods from the Upper Permian (Changhsingian) - Lower Triassic (Griesbachian) interval of the Dajiang section, Guizhou Province, South China. 112 species belonging to 27 genera are recognized.
Marie-Beatrice FOREL   +2 more
core   +1 more source

AGE OF THE AMNUNAKTA MONZOGABBRO-MONZODIORITE MASSIF IN THE SOUTHERN FRAMING OF THE SIBERIAN CRATON

open access: yesГеодинамика и тектонофизика, 2020
The first geochronological data have been obtained for Amnunakta massif composed of monzogabbro-monzodiorite and located in the southeastern part of the Selenga-Stanovoy superterrane.
I. V. Buchko   +2 more
doaj   +1 more source

Pre-Carpels from the Middle Triassic of Spain

open access: yesPlants, 2022
In stark contrast to the multitude of hypotheses on carpel evolution, there is little fossil evidence testing these hypotheses. The recent discovery of angiosperms from the Early Jurassic makes the search for precursors of angiosperm carpels in the ...
Artai A. Santos, Xin Wang
doaj   +1 more source

Revision of the thylacocephalan biota from the Upper Triassic Polzberg Konservat-Lagerstätte, Austria [PDF]

open access: yesActa Palaeontologica Polonica
Known for over 140 years, the Upper Triassic Polzberg Konservat-Lagerstätte is an exceptional early Carnian marine assemblage discovered in the Northern Calcareous Alps of Lower Austria. The Polzberg biota is composed of a diverse marine fauna, including
Thomas Laville   +2 more
doaj   +1 more source

Postcranial osteology of the first early-stage juvenile skeleton of Plateosaurus trossingensis from the Norian of Frick, Switzerland [PDF]

open access: yesActa Palaeontologica Polonica, 2020
Owing to monospecific mass-accumulation sites in Central Europe, the early-branching sauropodomorph Plateosaurus has one of the best fossil records among dinosaurs. Despite this, early-stage juveniles have been conspicuously absent.
Darius Nau   +3 more
doaj   +1 more source

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