Topic
Dicynodont
About: Dicynodont is a research topic. Over the lifetime, 212 publications have been published within this topic receiving 6728 citations. The topic is also known as: Dicynodontia.
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TL;DR: The vertebrate fossil data show a gradual extinction in the Upper Permian punctuated by an enhanced extinction pulse at the Permians-Triassic boundary interval, particularly among the dicynodont therapsids, coinciding with negative carbon-isotope anomalies.
Abstract: The Karoo basin of South Africa exposes a succession of Upper Permian to Lower Triassic terrestrial strata containing abundant terrestrial vertebrate fossils. Paleomagnetic/magnetostratigraphic and carbon-isotope data allow sections to be correlated across the basin. With this stratigraphy, the vertebrate fossil data show a gradual extinction in the Upper Permian punctuated by an enhanced extinction pulse at the Permian-Triassic boundary interval, particularly among the dicynodont therapsids, coinciding with negative carbon-isotope anomalies.
288 citations
TL;DR: In particular, the enormous palaeontological wealth of the Karoo, covering a period of almost 100 million years from the Permian to the Jurassic, has enhanced understanding of the evolution of important tetrapod lineages, including mammals and dinosaurs as discussed by the authors.
Abstract: Fossil discoveries from South Africa have greatly expanded knowledge of the development of life on Earth. In particular, the enormous palaeontological wealth of the Karoo, covering a period of almost 100 million years from the Permian to the Jurassic, has enhanced understanding of the evolution of important tetrapod lineages, including mammals and dinosaurs. These fossils provide the best record of continental Permian to Jurassic faunal biodiversity, and have been crucial to studies of the global Permo-Triassic mass extinction in the continental realm, as well as giving insight into other extinction events. Recent collaborative interdisciplinary studies of stratigraphic and geographic distribution patterns of Karoo fossils have enhanced biostratigraphic resolution and global correlation of vertebrate faunas from the Permian to the Jurassic. This in turn has led to a better understanding of the biodiversity across Pangaea, and the places of origin and initial diversity of early tetrapod evolutionary lineages. Many of these originated in the southern African portion of the Gondwanan super-continent. The combination of palaeontological and sedimentological studies has led to new basin development models and solved problems which each discipline in isolation could not have achieved.
288 citations
TL;DR: This article used field observations of the sedimentary facies, palaeosols and in situ fossils of well exposed PTr boundary sequences in the southern Karoo Basin to provide evidence of environmental changes that may have caused the tetrapod extinctions in the main Karoo basin.
223 citations
TL;DR: The Clouston Farm site provides a glimpse into a late Permian ecosystem of primary producers, herbivores, and insectivores—a prelude to the crisis that engulfed life at the end of the period.
139 citations
TL;DR: Paleoclimatic time series from Permian and Triassic paleosols reveal transient episodes of unusually warm and wet conditions, interrupting long periods of cool and dry conditions usual for calcareous red paleools as mentioned in this paper.
139 citations