Results 131 to 140 of about 8,625 (202)
Morphogenesis of pteraspid heterostracan oral plates and the evolutionary origin of teeth. [PDF]
R Soc Open SciGrohganz M +3 more
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Finite element and microstructural analyses indicate that pteraspid heterostracan oral plate microstructure was adapted to a mechanical function. [PDF]
PalaeontologyGrohganz M +5 more
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The holocephalan ratfish endoskeleton shares trabecular and areolar mineralization patterns, but not tesserae, with elasmobranchs little skate and catshark. [PDF]
ElifeAtake OJ +3 more
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Paleontological Research, 2021
. The ammonoid-bearing limestone blocks at the classic Crittenden Springs ammonoid site belong to the lower part of the Lower Triassic Thaynes Group. These 0.5–1.2 m thick blocks, consisting mainly of bioclastic floatstone and rudstone, contain abundant ...
T. Maekawa, J. Jenks
semanticscholar +1 more source
. The ammonoid-bearing limestone blocks at the classic Crittenden Springs ammonoid site belong to the lower part of the Lower Triassic Thaynes Group. These 0.5–1.2 m thick blocks, consisting mainly of bioclastic floatstone and rudstone, contain abundant ...
T. Maekawa, J. Jenks
semanticscholar +1 more source
, 2021
Conodont ecology of the Early Triassic Smithian–Spathian transition is still poorly understood. Here we use oxygen isotope ratios of monogeneric conodonts from Omani samples to reveal the differences of oxygen isotopic composition between different taxa.
Yanlong Chen +8 more
semanticscholar +1 more source
Conodont ecology of the Early Triassic Smithian–Spathian transition is still poorly understood. Here we use oxygen isotope ratios of monogeneric conodonts from Omani samples to reveal the differences of oxygen isotopic composition between different taxa.
Yanlong Chen +8 more
semanticscholar +1 more source
, 2020
The End-Triassic Extinction event (ETE) has been recognized in numerous sections worldwide and it is usually marked by three negative carbon isotope excursions (NCIEs), named “precursor” (P-NCIE), “initial” (I-NCIE) and “main” (M-NCIE) negative carbon ...
Yixing Du +8 more
semanticscholar +1 more source
The End-Triassic Extinction event (ETE) has been recognized in numerous sections worldwide and it is usually marked by three negative carbon isotope excursions (NCIEs), named “precursor” (P-NCIE), “initial” (I-NCIE) and “main” (M-NCIE) negative carbon ...
Yixing Du +8 more
semanticscholar +1 more source
Conodonts across the Silurian/Devonian boundary in the Carnic Alps (Austria and Italy)
, 2020In the Carnic Alps, located across the border between Italy and Austria, several sections span the Silurian/Devonian boundary in different sedimentary settings, from very shallow water to moderately deep shelf.
C. Corradini +3 more
semanticscholar +1 more source
Science, 1976
Conodonts are zoologically enigmatic, toothlike phosphatic microfossils occurring in marine sedimentary rocks ranging in age from Cambrian to Triassic. Dimpled spheres of less than 1 millimeter in diameter are sporadic associates of conodonts and have identical chemical composition and microstructure.
B F, Glenister, G, Klapper, K M, Chauff
openaire +2 more sources
Conodonts are zoologically enigmatic, toothlike phosphatic microfossils occurring in marine sedimentary rocks ranging in age from Cambrian to Triassic. Dimpled spheres of less than 1 millimeter in diameter are sporadic associates of conodonts and have identical chemical composition and microstructure.
B F, Glenister, G, Klapper, K M, Chauff
openaire +2 more sources
, 2020
In-situ minor, trace and rare earth element (REE) compositions have been measured in conodonts from the lower Silurian Vesiku Bone Bed (Estonia), with the aim to visualize and to quantify conodont apatite elemental geochemistry, to evaluate compositional
Ž. Žigaitė +5 more
semanticscholar +1 more source
In-situ minor, trace and rare earth element (REE) compositions have been measured in conodonts from the lower Silurian Vesiku Bone Bed (Estonia), with the aim to visualize and to quantify conodont apatite elemental geochemistry, to evaluate compositional
Ž. Žigaitė +5 more
semanticscholar +1 more source
Earth-Science Reviews, 2019
In contrast to the benthos whose taxonomic recovery was lagging way behind that of the nekton, highly diverse Smithian conodont and ammonoid faunas were profoundly decimated during the late Smithian, ca.
Marc Leu, H. Bucher, N. Goudemand
semanticscholar +1 more source
In contrast to the benthos whose taxonomic recovery was lagging way behind that of the nekton, highly diverse Smithian conodont and ammonoid faunas were profoundly decimated during the late Smithian, ca.
Marc Leu, H. Bucher, N. Goudemand
semanticscholar +1 more source