نتایج جستجو برای: lower jurassic

تعداد نتایج: 695525  

Journal: :Historical Biology 2022

Comprising more than 350 dinosaur footprints and at least 38 trackways, the TY tracksite described herein is located close to border of NW Lesotho, near Teyateyaneng (TY), probably identical site originally mentioned by Dornan in 1908. The tridactyl are exposed as natural casts on a cliff overhang fallen block base uppermost Elliot Formation (Sinemurian, Lower Jurassic). High-resolution photogr...

2015
Fenglu Han Catherine A. Forster James M. Clark Xing Xu Matthew Shawkey

Ceratopsia is one of the best studied herbivorous ornithischian clades, but the early evolution of Ceratopsia, including the placement of Psittacosaurus, is still controversial and unclear. Here, we report a second basal ceratopsian, Hualianceratops wucaiwanensis gen. et sp. nov., from the Upper Jurassic (Oxfordian) Shishugou Formation of the Junggar Basin, northwestern China. This new taxon is...

2017
Benjamin E. COHEN Darren F. MARK Martin R. LEE Sarah L. SIMPSON

The Rochechourt impact structure in south-central France, with maximum diameter of 40–50 km, has previously been dated to within 1% uncertainty of the Triassic– Jurassic boundary, at which time ~30% of global genera became extinct. To evaluate the temporal relationship between the impact and the Triassic–Jurassic boundary at high precision, we have re-examined the structure’s age using multicol...

Journal: :Proceedings. Biological sciences 2014
Ben Thuy Steffen Kiel Alfréd Dulai Andy S Gale Andreas Kroh Alan R Lord Lea D Numberger-Thuy Sabine Stöhr Max Wisshak

Owing to the assumed lack of deep-sea macrofossils older than the Late Cretaceous, very little is known about the geological history of deep-sea communities, and most inference-based hypotheses argue for repeated recolonizations of the deep sea from shelf habitats following major palaeoceanographic perturbations. We present a fossil deep-sea assemblage of echinoderms, gastropods, brachiopods an...

Journal: :Palaeodiversity 2022

The Paleontological Collection of Tübingen University houses one the largest collections ichthyosaur specimens from Lower Jurassic (Lower Toarcian) Posidonienschiefer Formation fossillagerstätte in world. It forms an important basis for numerous past and ongoing studies on taxonomy, evolutionary morphology, ecology, other aspects biology. collection includes particularly significant material, s...

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