Reassessment of 'Plesiosaurus' megacephalus (Sauropterygia: Plesiosauria) from the Triassic-Jurassic boundary, UK
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منابع مشابه
High Diversity, Low Disparity and Small Body Size in Plesiosaurs (Reptilia, Sauropterygia) from the Triassic–Jurassic Boundary
Invasion of the open ocean by tetrapods represents a major evolutionary transition that occurred independently in cetaceans, mosasauroids, chelonioids (sea turtles), ichthyosaurs and plesiosaurs. Plesiosaurian reptiles invaded pelagic ocean environments immediately following the Late Triassic extinctions. This diversification is recorded by three intensively-sampled European fossil faunas, span...
متن کاملTriassic–Jurassic boundary events: Problems, progress, possibilities
As for most geological period boundaries, the Triassic–Jurassic (T–J) transition, ∼200 million years ago, was a critical juncture in Earth history during which profound biotic and environmental changes took place. Early comparisons with the end-Cretaceous extinction and the involvement of extraterrestrial impact have now largely, although not entirely, given way to more Earthbound explanations ...
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The presence of gigantic apex predators in the eastern Panthalassic and western Tethyan oceans suggests that complex ecosystems in the sea had become re-established in these regions at least by the early Middle Triassic, after the Permian-Triassic mass extinction (PTME). However, it is not clear whether oceanic ecosystem recovery from the PTME was globally synchronous because of the apparent la...
متن کاملA Phylogeny of Plesiosauria (sauropterygia), with Emphasis on the Systematic Status of Leptocleidus, Andrews
Autonomous Region in northwestern China. Taxa described in the last ten years include the psittacosaurid Hongshanosaurus (You et al. 2003), and basal neoceratopsians Archaeoceratops (Dong and Azuma 1997), Chaoyangsaurus (Zhao et al. 1999), Magnirostris (You and Dong 2003), and Auroraceratops (You et al. 2005). Auroraceratops from the Mazongshan region of Gansu is short-faced and has very broad ...
متن کاملResetting the evolution of marine reptiles at the Triassic-Jurassic boundary.
Ichthyosaurs were important marine predators in the Early Jurassic, and an abundant and diverse component of Mesozoic marine ecosystems. Despite their ecological importance, however, the Early Jurassic species represent a reduced remnant of their former significance in the Triassic. Ichthyosaurs passed through an evolutionary bottleneck at, or close to, the Triassic-Jurassic boundary, which red...
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ژورنال
عنوان ژورنال: Palaeontologia Electronica
سال: 2015
ISSN: 1094-8074
DOI: 10.26879/504