Tent tortoise
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| Western 'Namaqualand' tent tortoise (P. t. trimeni) | |
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| Northern tent tortoise (P. t. verroxii) | |
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| Scientific classification Edit this classification | |
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| Binomial name | |
| Template:Taxon infoTemplate:Taxon italics | |
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| IUCN distribution of the Karoo tent tortoise
Page Template:Legend/styles.css has no content. Karoo tent tortoise
Page Template:Legend/styles.css has no content. Western 'Namaqualand' tent tortoise
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| Synonyms[2] | |
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The tent tortoise (Psammobates tentorius) is a species of tortoise and one of three members of the genus, Psammobates.[4] Known locally as the Karoo tent tortoise, this highly variable species is found in South Africa and Namibia.[5]
Distribution
The Karoo tent tortoise occurs at very low densities throughout the Karoo and other semi-desert areas of southern Africa, extending from central Namibia almost to the southern coast of South Africa.
Within this range, its population is very sparse and individuals are normally rare and widely separated. The species is also increasingly rare due to habitat destruction and illegal collecting for the pet trade. Due to its specific diet that consists of certain Karoo plants, this species rarely survives in captivity and usually soon dies when taken outside of its natural habitat.
Identification
The Karoo tent tortoise is a very variable species, with at least three subspecies. Its shell is dark brown or black with a pattern of yellow or orange striped stars radiating from the centre of each domed shield making up the carapace. The tent tortoise has a beautiful geometric pattern of 'Bedouin tents' on its upper shell, and this is appropriate, for it is quite at home in the semi-desert. The colouring and size of this little tortoise vary greatly, particularly from one area to another, but also within a single 'population'. Occasional specimens are a uniform brown, though this is very rare. Male specimens are much smaller than the females, and have concave bellies.
Although this species shares much of its superficial outer appearance with its relatives in the genus Psammobates, it can easily be distinguished by its un-serrated shell margins, and the scutes along its shell bridge, which are broader than they are high.
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Subspecies
Three subspecies are recognised by biologists:
- Southern ("Karoo") tent tortoise, Psammobates tentorius tentorius (type species) or common tent tortoise. Authority: Bell 1828. Distribution: The southern Karoo region. South Africa(Southern and eastern Karoo from Grahamstown to Matjiesfontein). This subspecies has the most sharply raised 'tents' (conical scutes), with dull yellow stars radiating on a black background.[6][7]
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| Scientific classification Edit this classification | |
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| Script error: No such module "Taxobox ranks".: | <div style="display:inline" class="script error: no such module "taxobox ranks".">Template:Taxon infoP. tentorius |
| Script error: No such module "Taxobox ranks".: | <div style="display:inline" class="script error: no such module "taxobox ranks".">Template:Taxon infoP. t. trimeni |
| Trinomial name | |
| Psammobates tentorius trimeni Boulenger, 1886
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Page Template:Taxobox/core/styles.css has no content.Template:Taxonbar/candidateWestern ("Namaqualand") tent tortoise, Psammobates tentorius trimeni. Authority: Boulenger, 1886. Distribution: The Namaqualand Coast of Namibia and South Africa (from Lambert's Bay north to beyond the Orange River in Great Namaqualand - extreme western Cape Provinces). This is the smallest subspecies, with the boldest, brightest colouring and well-developed 'tents' (conical shell scutes).[6][7]
- Northern ("Bushmanland") tent tortoise, Psammobates tentorius verroxii. Authority: Smith, 1839. Distribution: The driest parts of the Karoo inland. Namibia (Northwest to the Great Namaqualand) and South Africa(Northern Cape Province). This subspecies has a flatter, rounder shell with underdeveloped 'tents', and more faded brown colouring.[6][7]
Behaviour
The female tent tortoise lays a clutch of one to three eggs, and buries them in the sand as all other tortoises do. The young emerge in late summer or early autumn.
Diet
They depend on a very specialised diet including assorted Karoo bushes, mesembryanthemums and other South African succulents. Due to this diet, this little tortoise does not usually survive in captivity and usually dies soon, when taken outside of its semi-desert habitat.
Notes
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- ^ JCVI.org (Retrieved Feb. 28, 2010).
- ^ Page Module:Citation/CS1/styles.css has no content.Fritz, Uwe; Havaš, Peter (2007). "Checklist of Chelonians of the World". Vertebrate Zoology. 57 (2): 290–292. doi:10.3897/vz.57.e30895. ISSN 1864-5755.
- ^ Template:Cite iucn
- ^ Zip Code Zoo (Retrieved 28 February 2010)
- ^ Page Module:Citation/CS1/styles.css has no content."Tent Tortoise".
- ^ a b c Page Module:Citation/CS1/styles.css has no content.Fritz, Uwe; Havaš, Peter (2007). "Checklist of Chelonians of the World". Vertebrate Zoology. 57 (2): 290–292. doi:10.3897/vz.57.e30895.
- ^ a b c Page Module:Citation/CS1/styles.css has no content.Rhodin, Anders G.J.; van Dijk, Peter Paul; Iverson, John B.; Shaffer, H. Bradley (2010-12-14). Turtles of the world, 2010 update: Annotated checklist of taxonomy, synonymy, distribution and conservation status (PDF). Vol. 5. p. 000.121. doi:10.3854/crm.5.000.checklist.v3.2010. ISBN 978-0-9653540-9-7. Archived from the original (PDF) on 2011-07-17.
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References
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- Auerbach, R.D. 1987. The Amphibians and Reptiles of Botswana. Mokwepa Consultants, Botswana, 295 pp.
- Bauer, Aaron M.; Branch, William R. & Haacke, Wulf D. 1993. The herpetofauna of the Kamanjab area and adjacent Damaraland, Namibia. Madoqua (Windhoek), 18 (2): 117–145.
- Duméril, A. M.C., G. BIBRON & A. DUMÉRIL 1854. Erpétologie générale ou Histoire Naturelle complète des Reptiles. Vol. 9. Paris, XX + 440 S.
- Ernst, C.H. and Barbour, R.W. 1989. Turtles of the World. Smithsonian Institution Press, Washington D.C. - London
- Greig, J.C., and P.D. Burdett. 1976. Patterns in the distributions of Southern African terrestrial tortoises (Cryptodira: Testudinidae). Zool. Africana 11(2): 250–267.
- Hughes, B. 1986. Longevity Records of African Captive Amphibians and Reptiles: Part 1: Introduction and Species List 1 - Amphibians and Chelonians Jour. Herp. Ass. Afr. (32): 1–5
- Kuhl, H. 1820. Beiträge zur Zoologie und vergleichenden Anatomie. Hermannsche Buchhandlung, Frankfurt, 152 pp.
- Loveridge, Arthur & Williams, Ernest E. 1957. Revision of the African Tortoises and Turtles of the Suborder Cryptodira. Bulletin of the Museum of Comparative Zoology 115 (6): 163–557
- Smith, A. 1840. Illustrations of the zoology of South Africa, Reptilia. Smith, Elder, and Co., London
- Valverde, J. 2005. Afrikanische Landschildkröten. Reptilia (Münster) 10 (6): 18–25
- Valverde, J. 2005. African Tortoises. Reptilia (GB) (43): 12-20
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