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The Jackson ratio is calculated by taking the weight of the tortoise in grams and dividing it by the cube of the length of the tortoise's carapace in centimeters. [1] This is essentially a value of the density of the tortoise in g/cm 3. The optimal value for this ratio is 0.21 with a range of 0.18–0.22 being acceptable for hibernation.
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Paleobiogeographical considerations suggest the rate of evolution of the mitochondrial 12S rRNA gene is 1.0-1.6% per million years for the last dozen million years or so in the present genus [4] and ntDNA evolution rate has been shown to vary strongly even between different population of T. hermanni; [5] this restricts sequence choice for ...
5. Archived from the original (PDF) on 2012-01-31. This page was last edited on 14 October 2024, at 12:44 (UTC). Text is available under the Creative Commons ...
The species was described by Louis Michel François Doyère in 1840; he placed it in the genus Emydium. [1]G. Ramazzotti and W. Maucci classified E. filamentos mongoliensis Iharos, 1973 [4] as a synonym of E. testudo in 1983; this was followed by other tardigradologists. [5]
Sequence evolution at least in mtDNA is known to proceed much more slowly in some turtles and tortoises than in others; [5] the rate of the mitochondrial 12S rRNA gene in Testudo is probably a rather low 1.0–1.6% per million years (as this fits best the paleobiogeographical situation), limiting the resolution provided by molecular systematics ...
An illustration of the shell of Hesperotestudo orthopygia. Species list is based on Vlachos, 2018 [2] † Hesperotestudo Williams 1950 [7] †Hesperotestudo bermudae Meylan and Sterrer 2000 [8] Bermuda, Middle Pleistocene c. 310,000 years before present (YBP) - shell length c. 50 centimetres (1.6 ft) [3] [9]
The Tunisian tortoise is a relatively small tortoise.The adult males usually have carapaces that seldom exceed 13 cm (about 4.5 in), whilst the adult females' carapaces are no more than 16.5 cm (some 6.5 in) long.