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Megalochelys ("great turtle") is an extinct genus of tortoises that lived from the Miocene to Pleistocene.They are noted for their giant size, the largest known for any tortoise, with a maximum carapace length of over 2 m (6.5 ft) in M. atlas.
Aldabrachelys [1] is genus of giant tortoises, including the Aldabra giant tortoise (Aldabrachelys gigantea) native to the Seychelles, as well as two extinct species, Aldabrachelys abrupta and Aldabrachelys grandidieri known from Madagascar.
Male tortoises compete with each other by extending their necks, gaping, biting and shell-bumping. They produce loud guttural noises while mating. Females lay clutches of usually 6–11 (occasionally up to 17) eggs. Juvenile tortoises tend to remain in the warmer, lowland, part of the subspecies' range for the first 10–15 years of their lives ...
The maximum shell length is up to 61 centimeters, make it slightly smaller than C. burchardi, which had a shell length range of 65 to 94 cm. [8] Fossilized tortoise eggs have been found in the islands of Lanzarote and Fuerteventura ; however, these eggs have not yet been properly described or named. [ 9 ]
The three Aldabra-Seychelles giant tortoise subspecies can be distinguished based on carapace shape, but many captive animals may have distorted carapaces, so they may be difficult to identify. Arnold's giant tortoise is flattened, smooth, and with a relatively high opening to the shell; it is usually black.
It was originally one of the six endemic tortoise species of Madagascar (two large Aldabrachelys; three medium Astrochelys; two small Pyxis). [3] It was sympatric with the other giant tortoise species of Madagascar, Grandidier's giant tortoise ( Aldabrachelys grandidieri (also extinct)), and both species occupied both the coasts and the cooler ...
Aldabrachelys grandidieri was a giant tortoise, one of the largest in the world, measuring about 125 cm (49 in) in carapace length. It was originally one of the six endemic tortoise species of Madagascar (two large Aldabrachelys ; two medium Astrochelys ; two small Pyxis ).
Chelonoidis niger chathamensis, commonly known as the Chatham Island giant tortoise or the San Cristóbal giant tortoise, is a subspecies of Galápagos tortoise endemic to San Cristóbal Island in the Galápagos.