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Pelusios williamsi LAURENT, 1965

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Higher TaxaPelomedusidae, Pelomedusoidea, Pleurodira, Testudines (turtles)
SubspeciesPelusios williamsi williamsi LAURENT 1965
Pelusios williamsi lutescens LAURENT 1965
Pelusios williamsi laurenti BOUR 1984 
Common NamesE: Williams’ African Mud Turtle 
SynonymPelusios williamsi williamsi LAURENT 1965: 2
Pelusios williamsi — BROADLEY 1998
Pelusios williamsi — TTWG 2014
Pelusios williamsi — SPAWLS et al. 2018: 63
Pelusios williamsi williamsi — TTWG 2021

Pelusios williamsi laurenti BOUR 1984
Pelusios williamsi laurenti — BROADLEY & HOWELL 1991: 7
Pelusios williamsi laurenti — TTWG 2014: 440
Pelusios williamsi laurenti — TTWG 2021

Pelusios williamsi lutescens LAURENT 1965
Pelusios williamsi lutescens LAURENT 1965: 16
Pelusios williamsi lutescens — MCCORD 1965
Pelusios williamsi lutescens — TTWG 2014: 440
Pelusios williamsi lutescens — TTWG 2021 
DistributionKenya, Tanzania, Uganda, E Democratic Republic of the Congo (formerly Zaire), Upper Nile drainages about Lakes Victoria, Albert and Edward

Type locality: "Kakamega, Kaimosi, Kenya".
Type locality: Ukerewe Island, Lake Victoria, Tanzania [laurenti]  
TypesHolotype: MCZ 40021.
Holotype: MCZ 30016, female, coll. A. Loveridge, 10-20 June 1930 [laurenti] 
CommentGenBank sequences of P. williamsi were nested within P. castaneus, but the morphological distinctiveness of the two species makes it likely that the GenBank sequences (derived from a turtle from the pet trade) are misidentified (FRITZ et al. 2010).

Habitat: freshwater (Lakes, quiet rivers) 
EtymologyNamed after Dr. Ernest Edward Williams (1914-1998), a herpetologist, Museum of Comparative Zoology, Harvard. 
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • Bonin, F., Devaux, B. & Dupré, A. 2006. Turtles of the World. English translation by P.C.H. Pritchard. Johns Hopkins University Press, 416 pp.
  • Bour, R. 1984. Note sur Pelusios williamsi Laurent. Rev. Française Aquariol. 11 (1): 27-32.
  • Bour, R. 2008. Global diversity of turtles (Chelonii; Reptilia) in freshwater. Hydrobiologia 595:593–598 - get paper here
  • Bour,R. 1983. Trois populations endémiques de genre Pelusios (Reptilia, Chelonii, Pelomedusidae) aux îles Seychelles; relations avec les espèces africaines et malagaches. Bull. Mus. Natl. Hist. Nat. Paris (4) 5: 343-382.
  • Broadley, D. G. & HOWELL, K. M. 1991. A check list of the reptiles of Tanzania, with synoptic keys. Syntarsus 1: 1—70
  • Ernst,C.H. and Barbour,R.W. 1989. Turtles of the World. Smithsonian Institution Press, Washington D.C. - London
  • Fritz, Uwe; Vargas-Ramírez, Mario; Široký, Pavel 2012. Phylogenetic position of Pelusios williamsi and a critique of current GenBank procedures (Reptilia: Testudines: Pelomedusidae). Amphibia-Reptilia 33 (1): 150-154 - get paper here
  • Fritz, Uwe; William R. Branch, Margaretha D. Hofmeyr, Jérôme Maran, Hynek Prokop, Alfred Schleicher, Pavel Š iroký, Heiko Stuckas, Mario Vargas-Ramírez, Miguel Vences, Anna K. Hundsdörfer 2010. Molecular phylogeny of African hinged and helmeted terrapins (Testudines: Pelomedusidae: Pelusios and Pelomedusa). Zoologica Scripta DOI: 10.1111/j.1463-6409.2010.00464.x - get paper here
  • Giebner, I. & W. Helm 1997. Nachzucht der F2 - Generation von Pelusios williamsi williamsi. Sauria 19 (2): 23-28 - get paper here
  • Joyce, Walter G.; James F. Parham , Tyler R. Lyson , Rachel C. M. Warnock and Philip C. J. Donoghue 2013. A Divergence Dating Analysis of Turtles Using Fossil Calibrations: An Example of Best Practices. Journal of Paleontology, 87(4):612-634 - get paper here
  • Laurent, R.F. 1965. A contribution to the knowledge of the genus Pelusios (Wagler). Annales de Musée Royal de l'Afrique Centrale, Science Zoologique. Tervuren. Ser. 8, 135: 1-33. - get paper here
  • Lenglet,G.L. & Depiereux,E. 1986. Note sur les sous-espèces de Pelusios williamsi Laurent, 1965: apport de l’analyse discriminante. Bull. Inst. Royal Sci. Nat. Belg., Biol. 56: 75-82
  • McCord, W.P., Joseph-Ouni, M. & Bour, R. 2004. Chelonian Illustrations #17: Eastern and Southern African Mud Turtles. Reptilia (GB) (37): 73-77 - get paper here
  • Spawls, S.; Howell, K.; Drewes, R.C. & Ashe, J. 2002. A field guide to the reptiles of East Africa. Academic Press, 543 pp. [reviews in HR 34: 396 and Afr. J. Herp. 51; 147] - get paper here
  • Spawls, Steve; Kim Howell, Harald Hinkel, Michele Menegon 2018. Field Guide to East African Reptiles. Bloomsbury, 624 pp. - get paper here
  • TTWG [Peter Paul van Dijk, John B. Iverson, Anders G.J. Rhodin, H. Bradley Shaffer, and Roger Bour] 2014. Turtles of the World, 7th Edition: Annotated Checklist of Taxonomy, Synonymy, Distribution with Maps, and Conservation Status. 000.v7. Chelonian Research Monographs (ISSN 1088-7105) No. 5, doi:10.3854/crm.5.000.checklist.v7.2014 - get paper here
  • TTWG; Rhodin, A.G.J., Iverson, J.B., Bour, R., Fritz, U., Georges, A., Shaffer, H.B., and van Dijk, P.P. 2021. Turtles of the World: Annotated Checklist and Atlas of Taxonomy, Synonymy, Distribution, and Conservation Status (9th Ed.). In: Rhodin, A.G.J., Iverson, J.B., van Dijk, P.P., Stanford, C.B., Goode, E.V., Buhlmann, K.A., and Mittermeier, R.A. (Eds.). Chelonian Research Monographs 8:1–472. doi:10.3854/crm.8.checklist.atlas.v9.2021. - get paper here
  • Witte, G. F. de & LAURENT,R.F. 1943. Contribution à la systématique des Boiginae du Congo Belge (Rept.) [and errata slip]. Rev. Zool. Bot. Afr. 37: 157-189
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