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One species of Megalochelys, M. atlas, is the largest known tortoise, with shells of 2 m (6 ft 7 in) in length having been reported. [2] Popular weight estimates for this taxon have varied greatly with the highest estimates reaching up to 4,000 kg (8,800 lb) in some instances. [3]
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.
They differed from any other giant tortoise species because of their modified jaws, reduced scales on the legs and shells averaging just 1mm thick. The shells of the giant tortoises were open-ended; the name Cylindraspis actually means "cylinder-shaped". This was a specific adaptation in response to the lack of predators, where thick, heavily ...
A tortoiseshell ornament from Micronesia Cabinet with tortoiseshell veneers French singing bird box with a case made out of tortoiseshell.. Tortoiseshell or tortoise shell is a material produced from the shells of the larger species of tortoise and turtle, mainly the hawksbill sea turtle, which is a critically endangered species according to the IUCN Red List largely because of its ...
Jonathan (hatched c. 1832) [2] [3] is a Seychelles giant tortoise (Aldabrachelys gigantea hololissa), a subspecies of the Aldabra giant tortoise (Aldabrachelys gigantea).His approximate age is estimated to be 192 as of 2025, making him the oldest known living land animal.
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 ).
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 ...
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.