Results 61 to 70 of about 792 (171)

A longirostrine Temnodontosaurus (Ichthyosauria) with comments on Early Jurassic ichthyosaur niche partitioning and disparity [PDF]

open access: yesPalaeontology, 2012
Abstract:  We describe an almost complete ichthyosaur skeleton from the middle Toarcian (Lower Jurassic) of the Beaujolais foothills near Lyon, France, and assign it to Temnodontosaurus azerguensis sp. nov. This new species exhibits cranial peculiarities such as a thin, elongated and possibly edentulous rostrum, as well as a reduced quadrate.
Martin, Jeremy   +3 more
openaire   +2 more sources

Ontogeny of the braincase inStenopterygius(Reptilia, Ichthyosauria) from the Lower Jurassic of Germany [PDF]

open access: yesJournal of Vertebrate Paleontology, 2019
The fossil record of the ichthyosaur genus Stenopterygius comprises a large number of specimens of all ontogenetic stages. This makes the taxon a good model for ontogenetic studies in a Mesozoic marine reptile. Here, we describe the morphology of the braincase elements of Stenopterygius over ontogeny and compare it with that of other known ichthyosaur ...
Feiko Miedema, Erin E. Maxwell
openaire   +1 more source

Filling the Corallian gap: new information on Late Jurassic marine reptile faunas from England [PDF]

open access: yes, 2018
Two of the best known Mesozoic marine reptile assemblages can be found in units deposited in the Jurassic Sub-Boreal Seaway of the UK: the late Middle Jurassic Oxford Clay Formation (OCF) and Late Jurassic Kimmeridge Clay Formation (KCF). They record two
Brusatte, Stephen   +2 more
core   +2 more sources

First record of the leptonectid ichthyosaur Eurhinosaurus longirostris from the Early Jurassic of Switzerland and its stratigraphic framework [PDF]

open access: yes, 2018
An incomplete skull of the leptonectid ichthyosaur Eurhinosaurus longirostris found in the Rietheim Member (previously "Posidonienschiefer”; Toarcian, Early Jurassic) of Staffelegg, Canton Aargau, is the first record from Switzerland of this taxon and ...
Maisch, Michael   +2 more
core  

Evolution of an Atom Impeded by Measurement: The Quantum Zeno Effect

open access: yes, 2001
A quantum system being observed evolves more slowly. This `'quantum Zeno effect'' is reviewed with respect to a previous attempt of demonstration, and to subsequent criticism of the significance of the findings. A recent experiment on an {\it individual}
Balzer, Chr.   +2 more
core   +2 more sources

A new partial skeleton of a cryptocleidoid plesiosaur from the Upper Jurassic Sundance Formation of Wyoming [PDF]

open access: yes, 2010
Cryptocleidoid plesiosaurs from the Upper Jurassic are well known from the Oxford Clay (Callovian) of the United Kingdom. The plesiosaurs of the nearly coeval Sundance Formation (Oxfordian) of North America are poorly known, but are thought to include ...
O’Keefe, F. Robin   +1 more
core   +2 more sources

Float, explode or sink: postmortem fate of lung-breathing marine vertebrates [PDF]

open access: yes, 2018
What happens after the death of a marine tetrapod in seawater? Palaeontologists and neontologists have claimed that large lung-breathing marine tetrapods such as ichthyosaurs had a lower density than seawater, implying that their carcasses floated at the
Benecke, Mark   +7 more
core  

A well-preserved specimen of Stenopterygius quadriscissus (Reptilia, Ichthyosauria) from the Early Jurassic (Toarcian) of Yorkshire, UK and new insights into species delineation in the genus [PDF]

open access: yesFossil Record
Despite abundant and productive Toarcian ichthyosaur-bearing localities in continental Europe, in the UK, Toarcian ichthyosaurs may often be fragmentary and/or too poorly preserved for positive identification.
Timothée Biot   +3 more
doaj   +3 more sources

The Slottsmøya marine reptile Lagerstätte: depositional environments, taphonomy and diagenesis [PDF]

open access: yes, 2015
The Late Jurassic Slottsmøya Member Lagerstätte on Spitsbergen offers a unique opportunity to study the relationships between vertebrate fossil preservation, invertebrate occurrences and depositional environment.
Delsett, Lene L.   +6 more
core   +2 more sources

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