Results 1 to 10 of about 10,317 (251)

A guide for microscopic description of fossil stromatolites [PDF]

open access: yesBrazilian Journal of Geology, 2023
Stromatolites are laminated biosedimentary structures of great importance for paleobiological, paleoecological, and paleoenvironmental analyses, mainly in Precambrian rocks. Their value is related to the glimpse of past life recorded in their lamination,
Evelyn Aparecida Mecenero Sanchez   +4 more
doaj   +1 more source

Photosymbiosis in Late Triassic scleractinian corals from the Italian Dolomites [PDF]

open access: yesPeerJ, 2021
During the Carnian, oligotrophic shallow-water regions of the western Tethys were occupied by small, coral-rich patch reefs. Scleractinian corals, which already contributed to the formation of the reef structure, owed their position most probably to the ...
Katarzyna Frankowiak   +2 more
doaj   +2 more sources

Shell variability in the stem turtles Proterochersis spp. [PDF]

open access: yesPeerJ, 2018
Background Turtle shells tend to exhibit frequent and substantial variability, both in bone and scute layout. Aside from secondary changes, caused by diseases, parasites, and trauma, this variability appears to be inherent and result from stochastic or ...
Tomasz Szczygielski   +2 more
doaj   +2 more sources

Paleobiology in the Mediterranean

open access: yesBollettino della Società Paleontologica Italiana, 2020
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Dominici S., Scarponi D.
openaire   +2 more sources

Ecomorphology and bone microstructure of Proterochampsia from the Chañares Formation [PDF]

open access: yesActa Palaeontologica Polonica, 2019
Proterochampsians are a South American endemic group of non-archosaurian archosauriforms with morphological characteristics recollecting Recent crocodilians, and therefore have been proposed as aquatic species. However, this has not been based on careful
Andrea Arcucci   +2 more
doaj   +1 more source

Exploring the past to protect the future: an analysis of conservation paleobiology in South America [PDF]

open access: yesAnais da Academia Brasileira de Ciências
Conservation paleobiology, an expanding field, employs taphonomy tools to investigate past environmental conditions and organisms before human impacts, thereby addressing key conservation issues.
ANNA CLARA A. DE ASSUMPÇÃO   +1 more
doaj   +1 more source

Appendicular skeleton of Protoceratops andrewsi (Dinosauria, Ornithischia): comparative morphology, ontogenetic changes, and the implications for non-ceratopsid ceratopsian locomotion [PDF]

open access: yesPeerJ, 2019
Protoceratops andrewsi is a well-known ceratopsian dinosaur from the Djadokhta Formation (Upper Cretaceous, Mongolia). Since the 1920s, numerous skeletons of different ontogenetic stages from hatchlings to adults, including fully articulated specimens ...
Justyna Słowiak   +2 more
doaj   +2 more sources

What are the limits on whale ear bone size? Non-isometric scaling of the cetacean bulla [PDF]

open access: yesPeerJ, 2021
The history of cetaceans demonstrates dramatic macroevolutionary changes that have aided their transformation from terrestrial to obligate aquatic mammals.
Sabrina L. Groves   +2 more
doaj   +2 more sources

Body mass estimation in Triassic cynodonts from Argentina based on limb variables

open access: yesActa Palaeontologica Polonica, 2022
Body mass estimations for extinct taxa are fundamental in palaeobiological reconstructions, but little work has been done on this topic for non-mammaliaform cynodonts (NMC), the diverse and abundant Permo-Cretaceous forerunners of mammals.
FLORENCIA S. FILIPPINI   +2 more
doaj   +1 more source

The soft-tissue attachment scars in Late Jurassic ammonites from Central Russia [PDF]

open access: yesActa Palaeontologica Polonica, 2015
Soft-tissue attachment scars of two genera and four species of Late Jurassic craspeditid ammonites from the Russian Platform are described. A previously suggested relationship between lateral attachment scars and ammonoid hyponome is confirmed, however,
Aleksandr A. Mironenko
doaj   +1 more source

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