Results 1 to 10 of about 3,402 (162)

Early sarcopterygian morphological disparity through the Devonian-Carboniferous crisis [PDF]

Scientific Reports
Major morphological adaptations characterized the early evolutionary history of sarcopterygians during the Devonian (419–359 Ma) and the Carboniferous (359–299 Ma), punctuated by environmental changes and biodiversity crises.
Olivia Vanhaesebroucke, Olivier Larouche, Richard Cloutier   +2 more
doaj   +2 more sources

Fossil arbuscular mycorrhizae from the Early Devonian [PDF]

Mycologia, 1995
The 400 million-year-old Rhynie chert has provided a wealth of information not only of early land plants, but also of the fungi that inhabited this paleoecosystem. In this paper we report the first unequivocal evidence of arbuscules in an endomycorrhizal symbiosis.
T N Taylor, H Hass
exaly   +3 more sources

A new origin of the ‘modern’ lungfish dentition revealed by taxonomic overlap between Devonian and Carboniferous dipnoans [PDF]

PeerJ
Lungfishes (Dipnoi, Sarcopterygii) initially radiated in the Early Devonian, and reached the apogee of their diversity during this period, especially with regard to their dentitions.
Amin El Fassi El Fehri, Alice M. Clement, Jorge Mondéjar Fernández, Merle Greif, Christian Klug   +4 more
doaj   +3 more sources

Early Cenozoic Eurekan strain partitioning and decoupling in central Spitsbergen, Svalbard [PDF]

Solid Earth, 2021
The present study of field, petrological, exploration well, and seismic data describes backward-dipping duplexes comprised of phyllitic coal and bedding-parallel décollements and thrusts localized along lithological transitions in tectonically thickened ...
J.-B. P. Koehl, J.-B. P. Koehl, J.-B. P. Koehl, J.-B. P. Koehl   +3 more
doaj   +1 more source

Devonian–Carboniferous extension and Eurekan inversion along an inherited WNW–ESE-striking fault system in Billefjorden, Svalbard [version 2; peer review: 2 approved, 1 not approved]

Open Research Europe, 2023
Background The Billefjorden area in central Spitsbergen hosts thick Lower–lowermost Upper Devonian, late–post-Caledonian collapse deposits presumably deformed during the Late Devonian Svalbardian Orogeny.
Lis Allaart, Jean-Baptiste P. Koehl, Riko Noormets   +2 more
doaj   +1 more source

DEVONIAN-CARBONIFEROUS MAGMATISM AND METALLOGENY IN THE SOUTH URAL ACCRETIONARY-COLLISIONAL SYSTEM

Геодинамика и тектонофизика, 2021
The oceanic stage in the history of the South Urals completed in the Ordovician – Early Silurian. The Ordovician through Devonian events in the region included the formation of an island arc in the East Ural zone from the Middle Ordovician to Silurian ...
A. M. Kosarev, A. G. Vladimirov, A. I. Khanchuk, D. N. Salikhov, V. B. Kholodnov, T. A. Osipova, G. A. Kallistov, I. B. Seravkin, I. R. Rakhimov, G. T. Shafigullina   +9 more
doaj   +1 more source

A novel reproductive strategy in an Early Devonian plant [PDF]

Current Biology, 2020
Bonacorsi et al. describe a new fossil from the Early Devonian that provides the earliest clear evidence for more advanced reproductive biology in land plants. The plant produced multiple spore size classes, which is an essential innovation necessary for all advanced plant reproductive strategies, including seeds and flowers.
Bonacorsi, N.K., Gensel, P.G., Hueber, F.M., Wellman, C.H., Leslie, A.B.   +4 more
openaire   +3 more sources

Petrogenesis, tectonic setting and geodynamic implications of keziergayin granites in the kelan basin (Chinese Altai): constraints from geochemistry, zircon U-Pb geochronology and Nd‒Hf‒Pb‒O isotopes

Frontiers in Earth Science, 2023
The Chinese Altai is characterized by abundant granitoids, which not only are indicators of the interaction between crust and mantle but also provide critical constraints on the tectonic evolution of the orogen. This study presents zircon U‒Pb‒O isotopes,
Kai Weng, Wenbin Kang, Xiaojian Zhao, Zhongping Ma, Jifei Cao, Qinglin Sui   +5 more
doaj   +1 more source

Endochondral bone in an Early Devonian ‘placoderm’ from Mongolia [PDF]

Nature Ecology & Evolution, 2020
Endochondral bone is the main internal skeletal tissue of nearly all osteichthyans—the group comprising more than 60,000 living species of bony fishes and tetrapods. Chondrichthyans (sharks and their kin) are the living sister group of osteichthyans and have cartilaginous endoskeletons, long considered the ancestral condition for all
Martin D. Brazeau, Sam Giles, Richard P. Dearden, Anna Jerve, Ya. Ariunchimeg, E. Zorig, Robert Sansom, Thomas Guillerme, Marco Castiello   +8 more
openaire   +7 more sources

Microanatomy of Early Devonian book lungs [PDF]

Biology Letters, 2008
The book lungs of an exceptionally preserved fossil arachnid (Trigonotarbida) from the Early Devonian (approx. 410 Myr ago) Rhynie cherts of Scotland were studied using a non-destructive imaging technique. Our three-dimensional modelling of fine structures, based on assembling successive images made at different focal planes through the translucent ...
Carsten, Kamenz, Jason A, Dunlop, Gerhard, Scholtz, Hans, Kerp, Hagen, Hass   +4 more
openaire   +2 more sources