# James Hopson
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{{short description|American paleontologist}}
'''James Allen Hopson''' (born 1935) is an American [paleontologist](/source/paleontologist) and [professor](/source/professor) (now retired) at the [University of Chicago](/source/University_of_Chicago). His work has focused on the [evolution](/source/evolution) of the [synapsids](/source/synapsida) (a group of [amniotes](/source/amniotes) that includes the [mammal](/source/mammal)s), and has been focused on the transition from [basal](/source/basal_(phylogenetics)) synapsids to mammals, from the late [Paleozoic](/source/Paleozoic) through the [Mesozoic](/source/Mesozoic) Eras. He received his [doctorate](/source/doctorate) at Chicago in 1965, and worked at [Yale](/source/Yale_University) before returning to Chicago in 1967 as a faculty member in [Anatomy](/source/Anatomy), and has also been a research associate at the [Field Museum of Natural History](/source/Field_Museum_of_Natural_History) since 1971.[{{cite web |url=http://chronicle.uchicago.edu/960523/hopson.shtml |title=Quantrell Award: James Hopson |access-date=2007-07-18 |last=Burton |first=Bill |date=1996-05-23 |publisher=The University of Chicago Chronicle }}] He has also worked on the [paleobiology](/source/paleobiology) of [dinosaur](/source/dinosaur)s, and his work, along with that of [Peter Dodson](/source/Peter_Dodson), has become a foundation piece for the modern understanding of [duckbill](/source/hadrosaurid) crests, social behavior, and variation.[{{cite journal |last=Hopson |first=James A. |year=1975 |title=The evolution of cranial display structures in hadrosaurian dinosaurs |journal=Paleobiology |volume=1 |issue=1 |pages=21–43 |doi=10.1017/s0094837300002165 }}] He received the [Quantrell Award](/source/Quantrell_Award).[{{cite web|title=Llewellyn John and Harriet Manchester Quantrell Awards for Excellence in Undergraduate Teaching|url=https://www.uchicago.edu/who-we-are/global-impact/accolades/llewellyn-john-and-harriet-manchester-quantrell-awards-for-excellence-in-undergraduate-teaching|website=UChicago}}]
==Selected publications==
*{{cite journal | last1 = Clark | first1 = J.M. | last2 = Hopson | first2 = J.A. | year = 1985 | title = Distinctive mammal-like reptile from Mexico and its bearing on the phylogeny of the Tritylodontidae | journal = Nature | volume = 315 | issue = 6018 | pages = 398–400 | doi = 10.1038/315398a0 | s2cid = 4280605 }}
*Hopson, J.A. & H.R. Barghusen. 1986. An analysis of therapsid relationships. In: The Ecology and Biology of Mammal-like Reptiles (Ed. by N. Hotton III, P. D. MacLean, J. J. Roth, & E. C. Roth), pp. 83–106. Washington DC: Smithsonian Institution Press.
*Hopson, J.A. 1991. Systematics of the non-mammalian Synapsida and implications for patterns of evolution in synapsids. In: Controversial Views on the Origin of Higher Categories of Vertebrates (Ed. by H. P. Schultze & L. Trueb), Ithaca: Cornell University Press.
*Allin, E.F. & J.A. Hopson. 1991. Evolution of the auditory system in Synapsida ("mammal-like reptiles" and primitive mammals) as seen in the fossil record. In: The Evolutionary Biology of Hearing (Ed. by D. B. Webster, A. Popper, and R. Fay), New York: Springer-Verlag.
*Wible, J. R. & J. A. Hopson. 1993. Basicranial evidence for early mammal phylogeny. In: Mammal Phylogeny (Ed. by F. S. Szalay, M. J. Novacek, & M. C. McKenna), New York: Springer-Verlag.
*{{cite journal | last1 = Hopson | first1 = J. A. | last2 = Rougier | first2 = G. W. | year = 1993 | title = Braincase structure in the oldest known skull of a therian mammal: Implications for mammalian systematics and cranial evolution | journal = American Journal of Science | volume = 293 | pages = 268–299 | doi = 10.2475/ajs.293.a.268 }}
*{{cite journal | last1 = Hopson | first1 = J.A. | year = 1995 | title = Patterns of evolution in the manus and peers of non-mammalian therapsids | journal = Journal of Vertebrate Paleontology | volume = 15 | issue = 3 | pages = 615–639 | doi = 10.1080/02724634.1995.10011252 }}
==References==
{{reflist}}
==Bibliography==
A. W. Crompton, Farish A. Jenkins Jr., Susan Hopson, Timothy J. Gaudin, and Matthew T. Carrano, "James Allen Hopson: A Biography", pages 507–515 in ''Amniote Paleobiology: Perspectives on the Evolution of Mammals, Birds, and Reptiles: A volume honoring James Allen Hopson'', edited by Matthew T. Carrano, Timothy J. Gaudin, Richard W. Blob, and John R. Wible. The University of Chicago Press, Chicago & London, 2006 {{ISBN|0-226-09477-4}}
==External links==
*[http://pondside.uchicago.edu/oba/faculty/hopson_j.html Organismal Biology & Anatomy] faculty homepage
*[https://web.archive.org/web/20070702145541/http://pondside.uchicago.edu/ceb/faculty/hopson.html Committee on Evolutionary Biology] faculty homepage
*[https://web.archive.org/web/20060926023138/http://maroon.uchicago.edu/news/articles/2005/02/22/professor_makes_ears.php Recent work] on the evolution of the mammalian ear
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Category:Living people
Category:American paleontologists
Category:People associated with the Field Museum of Natural History
Category:1935 births
Category:Presidents of the Society of Vertebrate Paleontology
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Adapted from the Wikipedia article [James Hopson](https://en.wikipedia.org/wiki/James_Hopson) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/James_Hopson?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.