TESTUDINES The order Testudines comprises reptiles characterized by having bodies enclosed in shells consisting of a dorsal carapace and a ventral plastron. They include Turtles, fresh water terrapins and land tortoises. The shell is formed through the fr of ribs. The jaw has tough, horny plates for gripping food. Nine species (five marine turtles, three freshwater terrapins and one tortoise) in six families are known from Sri Lanka. One species is restricted to Sri Lanka, while another has been introduced through the pet trade. EMYDIDAE (FRESHWATER TERRAPINS) Emydids are primarily freshwater Testudines, though some species inhabit brackish waters and a few are terrestrial. Their sizes are variable (11-60cm in length). In some species the carapace is domed, but most have a low-arching carapace. Ninety-five species in 33 genera are known from North America, northern South America, Europe, north-western Africa, and Asia. A single introduced species occur in Sri Lanka.
Order Testudines characterized by an uncommon hard or cartilaginous shell created from their ribs and going about as a shield.โTurtleโ may allude to the request in general (American English) or to new water and ocean staying Testudines (British English). The Order Testudines incorporates both surviving (living) and wiped out species. The most punctual known individuals from this gathering date from the Middle Jurassic, making turtles one of the most seasoned reptile gatherings and a more obsolescent gathering than snakes or crocodilians. Of the 356 known species alive today, some are profoundly endangered.
Turtles are ectothermsโcreatures regularly called relentlessโimplying that their inner temperature changes as indicated by the encompassing condition. In any case, in light of their high metabolic rate, leatherback ocean turtles have an internal heat level that is recognizably higher than that of the encompassing water. Turtles are named amniotes, alongside different reptiles, birds, and warm-blooded animals. Like different amniotes, turtles inhale air and donโt lay eggs submerged, albeit numerous species live in or around water.
The biggest living chelonian is the leatherback ocean turtle (Dermochelys coriacea), which arrives at a shell length of 200 cm (6.6 ft) and can arrive at a load of more than 900 kg (2,000 lb). Freshwater turtles are commonly littler, yet with the biggest species, the Asian softshell turtle Pelochelys cantorii, a couple of people have been accounted for up to 200 cm (6.6 ft). These diminutive people even the better-realized crocodile snapping turtle, the biggest chelonian in North America, which achieves a shell length of up to 80 cm (2.6 ft) and weighs as much as 113.4 kg (250 lb).
Monster tortoises of the genera Geochelone, Meiolania, and others were generally broadly conveyed far and wide into ancient occasions, and are known to have existed in North and South America, Australia, and Africa. They got terminated simultaneously as the presence of man, and it is expected people chased them for nourishment. The main enduring monster tortoises are on the Seychelles and Galรกpagos Islands and can develop to more than 130 cm (51 in) long, and weigh around 300 kg (660 lb).
The biggest ever chelonian was Archelon ischyros, a Late Cretaceous ocean turtle known to have been up to 4.6 m (15 ft) long.
The littlest turtle is the dotted padloper tortoise of South Africa. It gauges close to 8 cm (3.1 in) long and weighs around 140 g (4.9 oz). Two different types of little turtles are the American mud turtles and musk turtles that live in a territory that ranges from Canada to South America. The shell length of numerous species in this gathering is under 13 cm (5.1 in) long.
CHECKOUT โ Introduction to Freshwater Fish in Sri Lanka
References
- Alderton, D. (1986). An Interpret Guide to Reptiles & Amphibians. London & New York: Salamander Books. ASIN B0010NVLQS.
- Amato, George (2007). A Conversation at the Museum of Natural History (video) (.flv). POV25. Retrieved November 1, 2012.. Filmmaker Eric Daniel Metzgar, the creator of the film The Chances of the World Changing, talks to George Amato, the director of conservation genetics at the American Museum of Natural History about turtle conservation and the relationship between evolution and extinction
- Angier, N. (December 12, 2012). โAll but Ageless, Turtles Face Their Biggest Threat: Humansโ. The New York Times.
- Anquetin, J. (2012). โReassessment of the phylogenetic interrelationships of basal turtles (Testudinata)โ. Journal of Systematic Palaeontology. 10 (1): 3โ45. doi:10.1080/14772019.2011.558928.
- Barzyk, J.E. (November 1999). โTurtles in Crisis: The Asian Food Marketsโ. Tortoise Trust. Retrieved November 1, 2012.
- Benton, M.J. (2000). Vertebrate Paleontology (2nd ed.). London: Blackwell Science. ISBN 978-0-632-05614-9. (3rd ed. 2004 ISBN 0-632-05637-1)
- Brennessel, B. (2006). Diamonds in the Marsh: A Natural History of the Diamondback Terrapin. UPNE. ISBN 978-1584655367.
- โTurtles as Pets | CDC Healthy Pets Healthy Peopleโ. Centers for Disease Control and Prevention. October 2007. Archived from the original on August 5, 2012. Retrieved August 1, 2012.
- Marshall Cavendish (2001). Endangered Wildlife and Plants of the World. ISBN 978-0761471943.
- Chen, T.-H.; Chang, H.-C.; Lue, K.-Y. (2009). โUnregulated Trade in Turtle Shells for Chinese Traditional Medicine in East and Southeast Asia: The Case of Taiwanโ. Chelonian Conservation and Biology. 8 (1): 11โ18. doi:10.2744/CCB-0747.1.
- Cheung, S.M.; Dudgeon, D. (NovemberโDecember 2006). โQuantifying the Asian turtle crisis: market surveys in southern China, 2000โ2003โ. Aquatic Conservation: Marine and Freshwater Ecosystems. 16 (7): 751โ770. doi:10.1002/aqc.803.
- Chiari, Y.; Cahais, V.; Galtier, N.; Delsuc, F. (2012). โPhylogenomic analyses support the position of turtles as the sister group of birds and crocodiles (Archosauria)โ. BMC Biology. 10 (65): 65. doi:10.1186/1741-7007-10-65. PMC 3473239. PMID 22839781.
- Connor, Michael J. (2009). โCTTCโs Turtle Triviaโ. California Turtle & Tortoise Club. Retrieved March 1,2009.
- Crawford, Nicholas G.; Faircloth, Brant C.; McCormack, John E.; Brumfield, Robb T.; Winker, Kevin; Glen, Travis C. (2012). โMore than 1000 ultraconserved elements provide evidence that turtles are the sister group to archosaursโ (PDF). Biology Letters. 8 (5): 783โ6. doi:10.1098/rsbl.2012.0331. PMC 3440978. PMID 22593086. Retrieved September 21, 2014.
- Dharmananda, S. (2011). โEndangered Species Issues Affecting Turtles and Tortoises Used in Chinese Medicine: Appendix 1, 2, and 3โ. Institute for Traditional Medicine. Retrieved November 1, 2012.
- Dubois, A.; Bour, R. (2010). โThe distinction between family-series and class-series nomina in zoological nomenclature, with emphasis on the nomina created by Batsch (1788, 1789) and on the higher nomenclature of turtlesโ (PDF). Bonn Zoological Bulletin. 57 (2): 149โ171. ISSN 0006-7172.
- Ernst, C.H.; Lovich, J.E. (2009). Turtles of the United States and Canada. JHU Press. ISBN 9780801891212.
- Everhart, Mike (2012). โMarine Turtlesโ. Oceans of Kansas Paleontology. Retrieved March 1, 2009.
- โCFR โ Code of Federal Regulations Title 21: FDA Regulation, Sec. 1240.62, page 678 part d1โ. U.S. Food and Drug Administration. 2012. Retrieved November 1, 2012.
- Fergus, Charles (2007). Turtles: Wild Guide. Wild guide. Mechanicsburg, PA: Stackpole books. p. viii. ISBN 9780811734202.
- โTurtle farms threaten rare species, experts sayโ. Fish Farmer. March 30, 2007. Archived from the originalon February 18, 2012. Retrieved November 1, 2012. Their source is an article by James Parham, Shi Haitao, and two other authors, published in Feb 2007 in the journal Conservation Biology
- Doctors Foster & Smith educational staff (2012). โAnatomy and Diseases of the Shells of Turtles and Tortoisesโ. Pet Education. Archived from the original on February 8, 2007. Retrieved March 1, 2009.
- Gaffney, E.S. (1996). โThe postcranial morphology of Meiolania platyceps and a review of the Meiolaniidaeโ. Bulletin of the American Museum of Natural History. 229: 1โ166. hdl:2246/1670.
- Gaffney, E.S.; Tong, H.; Meylan, P.A. (2006). โEvolution of the side-necked turtles: the families Bothremydidae, Euraxemydidae, and Araripemydidaeโ. Bulletin of the American Museum of Natural History. 300: 1โ698. doi:10.1206/0003-0090(2006)300[1:EOTSTT]2.0.CO;2. hdl:2246/5824.
- Gafney, E.; Hutchinson, H.; Jenkins, F.; Meeker, L. (1987). โModern turtle origins; the oldest known cryptodireโ. Science. 237 (4812): 289โ291. Bibcode:1987Sciโฆ237..289G. doi:10.1126/science.237.4812.289. PMID 17772056.
- Gannon, Megan (October 31, 2012). โJurassic turtle graveyard found in Chinaโ. Livescience.com.
- โIsnโt it against the law to sell turtles that are smaller than 4 inches?โ. Gulf Coast Turtle and Tortoise Society. November 2007. Retrieved November 1, 2012.
- Hylton, H. (May 8, 2007). โKeeping U.S. Turtles Out of Chinaโ. Time. Retrieved November 1, 2012.There is also a copy of the article at the TSA site. Articles by Peter Paul van Dijk are mentioned as the main source.
- Hutchinson, J. (1996). โIntroduction to Testudines: The Turtlesโ. University of California Museum of Paleontology.
- Iwabe, Naoyuki; Hara, Yuichiro; Kumazawa, Yoshinori; Shibamoto, Kaori; Saito, Yumi; Miyata, Takashi; Katoh, Kazutaka (December 2004). โSister group relationship of turtles to the bird-crocodilian clade revealed by nuclear DNA-coded proteinsโ. Molecular Biology and Evolution. 22 (4): 810โ813. doi:10.1093/molbev/msi075. PMID 15625185. Retrieved December 12, 2010.
- Iverson, J.B.; Kimerling, A. Jon; Kiester, A. Ross (1999). โList of All Familiesโ. Terra Cognita Laboratory, Geosciences Department of Oregon State University. Retrieved October 1, 2012.
- Jackson, D. C. (2002). โHibernating without oxygen: Physiological adaptations of the painted turtleโ. Journal of Physiology. 543 (Pt 3): 731โ7. doi:10.1113/jphysiol.2002.024729. PMC 2290531. PMID 12231634.
- Joyce, Walter G. (2007). โPhylogenetic relationships of Mesozoic turtlesโ (PDF). Bulletin of the Peabody Museum of Natural History. 48 (1): 3โ102. doi:10.3374/0079-032x(2007)48[3:promt]2.0.co;2. Archived from the original (PDF) on June 6, 2013.
