Dinosaur Success in the Triassic: A Noncompetitive Ecological Model

  title={Dinosaur Success in the Triassic: A Noncompetitive Ecological Model},
  author={Michael J. Benton},
  journal={The Quarterly Review of Biology},
  pages={29 - 55}
  • M. Benton
  • Published 1 March 1983
  • Environmental Science, Geography
  • The Quarterly Review of Biology
The initial radiation of the dinosaurs in the Triassic period (about 200 million years ago) has been generally regarded as a result of successful competition with the previously dominant mammal-like reptiles. A detailed review of major terrestrial reptile faunas of the Permo-Triassic, including estimates of relative abundance, gives a different picture of the pattern of faunal replacements. Dinosaurs only appeared as dominant faunal elements in the latest Triassic after the disappearance of… 

Triassic environments, climates and reptile evolution

The roles of herbivory and omnivory in early dinosaur evolution

  • P. BarrettR. ButlerS. Nesbitt
  • Environmental Science, Geography
    Earth and Environmental Science Transactions of the Royal Society of Edinburgh
  • 2010
Consideration of diversity patterns and relative abundance suggests that the ability to eat plants might have been a major factor promoting sauropodomorph success, but that it was less important in the early evolution of Ornithischia.

The Origin of the Dinosaurs El origen de los dinosaurios

  • J. Benton
  • Environmental Science, Geography
  • 2006
The origin of the dinosaurs has long been debated. There are two aspects, phylogenetic and ecological-evolutionary. Much of the phylogenetic confusion has been resolved by cladistic analysis of basal

The origin and early radiation of dinosaurs

The beginning of the ‘Age of Dinosaurs’: a brief overview of terrestrial biotic changes during the Triassic

  • N. FraserH. Sues
  • Geography, Environmental Science
    Earth and Environmental Science Transactions of the Royal Society of Edinburgh
  • 2010
Future work directed toward improved absolute age assessments for major faunal assemblages will be critical for a better understanding of the transition from therapsid-dominated to dinosaur-dominated communities during the early Mesozoic.

The Carnian Pluvial Episode in Italy : History of the research and perspectives

The Carnian Pluvial Episode (CPE) was a perturbation of the Late Triassic climate that had a strong impact on marine and terrestrial ecosystems. The CPE is still a relatively neglected episode if

Dinosaur diversification linked with the Carnian Pluvial Episode

Palaeontological and dated stratigraphic evidence is synthesized to show that dinosaur diversification followed the Carnian Pluvial Episode 234–232 mya, a time when climates switched from arid to humid and back to arid again.

Did dinosaurs invent flowers? Dinosaur—angiosperm coevolution revisited

  • P. BarrettK. Willis
  • Environmental Science, Geography
    Biological reviews of the Cambridge Philosophical Society
  • 2001
It is concluded that there are no strong spatiotemporal correlations in support of the hypothesis that dinosaurs were causative agents in the origin of angiosperms; however, dinosaur–angiosperm interactions in the Late Cretaceous may have resulted in some coevolutionary interactions, although direct evidence of such interactions is scanty at present.

Early Triassic terrestrial tetrapod fauna: a review

Niche partitioning shaped herbivore macroevolution through the early Mesozoic

This work identifies five main herbivore guilds (ingestion generalists, prehension specialists, durophagous specialists, shearing pulpers, and heavy oral processors), and finds that herbivor clades generally avoided competition by almost exclusively occupying different guilds.




The term chronofauna 1 is proposed to differentiate faunal units in which time is an important factor from those in which it is not, and to gain information concerning both physical and biological aspects of environment adequate to provide a background for study of many phases of adaptive modifications of animals.

Permo-Triassic Extinctions: Relation to Sea-Floor Spreading

  • T. Schopf
  • Environmental Science, Geography
    The Journal of Geology
  • 1974
An analysis of the Permo-Triassic fauna and paleogeography on a stage-by-stage basis supports previous more general summaries by concluding that the number of families of marine invertebrates was

Triassic reptiles from the elgin area: Stagonolepis, Dasygnathus and their allies

  • A. D. Walker
  • Environmental Science
    Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
  • 1961
It is suggested that a trend towards the reduction of the anterior pterygoid muscle took place in aetosaurids, in parallel with a similar trend in ornithischian dinosaurs.

The Evolution of Endothermy in the Phylogeny of Mammals

  • B. McNab
  • Environmental Science, Biology
    The American Naturalist
  • 1978
It is concluded that many of the characteristics that distinguish mammals from reptiles, including endothermy, viviparity, and even lactation, may be related to the marked decrease in body size that occurred in the evolution of mammals from advanced therapsids.

Reconstructing Triassic vegetation of eastern Australasia: a new approach for the biostratigraphy of Gondwanaland

As is widely recognised, fossil florules are difficult to correlate because they appear to have been more controlled by environmental and ecological factors than uniform changes which reflect the

A rhynchosaur from the Upper Triassic Maleri Formation of India.

  • S. Chatterjee
  • Environmental Science, Geography
    Philosophical transactions of the Royal Society of London. Series B, Biological sciences
  • 1974
Six associated rhynchosaur skeletons, recently discovered by the Geological Studies Unit of the Indian Statistical Institute in the Upper Triassic Maleri Formation, allow an almost complete

The stratigraphic distribution and occurrence of South African fossil Amphibia in the Beaufort beds

A short account is given of the distribution and occurrence of fossil amphibians from the Beaufort succession, based on analyses of specimens in various South African and overseas insti­ tutions.

Punctuated equilibria: an alternative to phyletic gradualism

Editorial introduction. Moving from populations to species. we recall that the process of speciation as seen through the hyperopic eyes of the paleontologist is an old and venerable theme. But the