Aldabrachelys is the recognised genus for the Seychelles and Madagascan radiations of giant tortoises, including the Aldabra giant tortoise (Aldabrachelys gigantea). This name is problematic in that the type specimen is actually a Chelonoidis denticulata; however, this is being discussed and petitioned before the ICZN.
Tortoise remains from over 1000 years ago, which have been found on the Comoros, are believed to have been from unknown species of the same genus.
- †A. abrupta (Grandidier 1868) – Madagascar, (extinct)
- A. gigantea (Schweigger, 1812) – Aldabra, granitic islands of Seychelles, four subspecies recognised
- A. g. arnoldi Bour 1982 – granitic islands of Seychelles, found only in captivity
- †A. g. daudinii Duméril & Bibron 1835 – Daudin's giant tortoise, Seychelles, (extinct)
- A. g. gigantia Schweigger, 1812 – Aldabra atoll, Seychelles
- A. g. hololissa Günther 1877 – granitic islands of Seychelles, only in captivity
- ^ a b Loveridge, A., and E. E. Williams. 1957. Revision of the African tortoises and turtles of the suborder Cryptodira. Bull. Mus. Comp. Zool. Harvard 115: 163-557.
- ^ Bour, R. 2006. Identity of Testudo gigantea Schweigger, 1812 and rediscovery of the type specimen. Emys, 13(4): 12–23.
- ^ Frazer, J., 2009. Testudo gigantea Schweigger, 1812 (currently Geochelone (Aldabrachelys) gigantea; Reptilia, Testudines): proposed conservation of usage of the specific name by maintenance of a designated neotype, and suppression of Testudo dussumieri Gray, 1831 (currently Dipsochelys dussumieri) BZN 66(1):Case:3463
- ^ J. Gerlach & K.L. Canning. 2000. Evolution and History of the Giant Tortoises of the Aldabra Island Group. Phelsumania
- ^ a b Schweigger, A. F. 1812. Monographiae Cheloniorum. Königsberg. Arch. Naturwiss. Math. 1: 271-368, 406-458.