Phrynops williamsi, juga dikenali sebagai Kura-kura Kepala Katak William, ialah spesies kura-kura dari Amerika Selatan.
Nama williamsi, diambil daripada pakar Herpetologi Amerika Ernest E. Williams.[4]
P. williamsi boleh ditemui di tenggara Brazil, Uruguay, dan Argentina.[5]
- ^ 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.
- ^ Fritz, Uwe; Peter Havaš (2007). "Checklist of Chelonians of the World" (PDF). Vertebrate Zoology. 57 (2): 341–342. ISSN 1864-5755. Diarkibkan daripada yang asal (PDF) pada 2010-12-17. Dicapai pada 29 May 2012.
- ^ 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.
- ^ 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).
- ^ Phrynops williamsi. The Reptile Database. www.reptile-database.org.