Skip to main content

Simpson, GeorgeGaylord

Simpson, GeorgeGaylord (1902–84)An American palaeontologist who supported the idea of ‘neo-Darwinian’ evolution, and initially fiercely opposed the theory of continental drift, basing his objections on his studies of fossil mammals, especially those of Madagascar. He proposed that the dispersion of species was caused by ‘sweepstake routes’. He was a leading authority on the palaeontology of South American mammals, discoverer of Hyracotherium (the ‘dawn horse’), and collaborated with Louis and Mary Leakey in their work on hominoid evolution. From 1936 he worked at the American Museum of Natural History, New York, eventually becoming chairman of its department of geology and palaeontology, and he was professor of vertebrate palaeontology first at Columbia University and later at Harvard. In 1970–82 he was a professor at the University of Arizona.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"Simpson, GeorgeGaylord." A Dictionary of Ecology. . Encyclopedia.com. 22 Aug. 2018 <http://www.encyclopedia.com>.

"Simpson, GeorgeGaylord." A Dictionary of Ecology. . Encyclopedia.com. (August 22, 2018). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/simpson-georgegaylord

"Simpson, GeorgeGaylord." A Dictionary of Ecology. . Retrieved August 22, 2018 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/simpson-georgegaylord

Learn more about citation styles

Citation styles

Encyclopedia.com gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).

Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.

Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia.com cannot guarantee each citation it generates. Therefore, it’s best to use Encyclopedia.com citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:

Modern Language Association

http://www.mla.org/style

The Chicago Manual of Style

http://www.chicagomanualofstyle.org/tools_citationguide.html

American Psychological Association

http://apastyle.apa.org/

Notes:
  • Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most Encyclopedia.com content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
  • In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.