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Chelonoidis duncanensis (GARMAN, 1996)

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Higher TaxaTestudinidae, Testudinoidea, Testudines (turtles) 
Subspecies 
Common NamesDuncan Island Giant Tortoise 
SynonymTestudo duncanensis GARMAN 1917 (nomen nudum)
Geochelone nigra duncanensis GARMAN in PRITCHARD 1996: 50
Testudo ephippium GÜNTHER 1875:271 (partim, misidentified type)
Chelonoidis duncanensis — RHODIN et al. 2010
Chelonoidis duncanensis — TTWG 2012: 277
Chelonoidis duncanensis — TTWG 2014: 395
Chelonoidis duncanensis — TTWG 2017: 128 
DistributionEcuador (Galapagos: Duncan [= Pinzón])

Type locality: Duncan Island  
Reproductionoviparous. 
TypesLectotype: MCZ 11068 (designated by Pritchard 1996: 47) 
Diagnosis 
CommentTaxonomy: This is a member of the Chelonoidis nigra species complex, variably considered subspecies of C. nigra or as valid species. Rhodin et al. (2010) listed them separately but under the heading “C. nigra species complex”.

Conservation: IUCN: Extinct in the Wild (1996), as Chelonoidis nigra duncanensis; TFTSG Draft 2010: Critically Endangered; CITES: Appendix I, as Chelonoidis nigra duncanensis. 
Etymology 
References
  • Pritchard, Peter C. H. 1996. The Galápagos Tortoises: Nomenclatural and survival status. Chelonian Research Monographs (1): 1-85 - 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; Anders G.J. Rhodin, John B. iverson, Roger Bour, Uwe Fritz, Arthur GeoRges, H. BRadley Shaffer, and Peter Paul van Dijk 2017. Turtles of the World: Annotated Checklist and Atlas of Taxonomy, Synonymy, Distribution, and Conservation Status (8th Ed.). In: Rhodin, A.G.J., Iverson, J.B., van Dijk, P.P., Saumure, R.A., Buhlmann, K.A., Pritchard, P.C.H., and Mittermeier, R.A. (Ed Chelonian Research Monographs 7:1–292. doi: 10.3854/crm.7.checklist.atlas.v8.2017 - get paper here
  • TTWG; Dijk, Peter Paul van; John B. Iverson, H. Bradley Shaffer; Roger Bour & Anders G.J. Rhodin [turtle taxonomy working group] 2012. Turtles of the World, 2012 Update: Annotated Checklist of Taxonomy, Synonymy, Distribution, and Conservation Status. Chelonian Research Monographs No. 5, doi:10.3854/crm.5.000.checklist.v5.2012 - get paper here
  • TTWG; Rhodin, A.G.J.; van Dijk, P.P.; Iverson, J.B. & Shaffer, H.B. [turtle taxonomy working group] 2010. Turtles of the World, 2010 Update: Annotated Checklist of Taxonomy, Synonymy, Distribution, and Conservation Status. Chelonian Research Monographs (ISSN 1088-7105) No. 5, doi:10.3854/crm.5.000.checklist.v3.2010 - get paper here
 
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