Phrynops williamsi

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Phrynops williamsi
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata
Class: Reptilia
Order: Testudines
Family: Chelidae
Subfamily: Chelinae
Genus: Phrynops
Species: P. williamsi
Binomial name
Phrynops williamsi
Rhodin & Mittermeier, 1983[1][2][3]

Phrynops williamsi, commonly known as William's toadhead turtle or William's South American side-necked turtle, is a species of turtle endemic to South America.


The specific name, williamsi, is in honor of American herpetologist Ernest E. Williams.[4]

Geographic range[edit]

P. williamsi is found in southeast Brazil, Uruguay, and Argentina.[5]


  1. ^ Rhodin, Anders G.J., and Mittermeier, Russell A. 1983. Description of Phrynops williamsi, a new species of chelid turtle of the South American P. geoffroanus complex. pp. 58-73. In: Rhodin, A.G.J., and Miyata, K. (Editors). 1983. Advances in Herpetology and Evolutionary Biology. Essays in Honor of Ernest E. Williams. Cambridge, Massachusetts: Museum of Comparative Zoology.
  2. ^ Fritz, Uwe; Peter Havaš (2007). "Checklist of Chelonians of the World". Vertebrate Zoology. 57 (2): 341–342. ISSN 1864-5755. Archived from the original (PDF) on 2010-12-17. Retrieved 29 May 2012. 
  3. ^ van Dijk, Peter Paul, John B. Iverson, H. Bradley Shaffer, Roger Bour, and Anders G.J. Rhodin. 2012. Turtles of the World, 2012 Update: Annotated Checklist of Taxonomy, Synonymy, Distribution, and Conservation Status. Chelonian Research Monographs No. 5, pp. 000.243–000.328.
  4. ^ Beolens, Bo, Michael Watkins, and Michael Grayson. 2011. The Eponym Dictionary of Reptiles. Baltimore, Maryland: Johns Hopkins University Press. xiii + 296 pp. ISBN 978-1-4214-0135-5. (Phrynops williamsi, p. 286).
  5. ^ Phrynops williamsi, The Reptile Database.

External links[edit]