دلهميات

Chelydrids; Temporal range: 70.6–0 م‌س PreЄ Є O S D C P T J K Pg N Late Cretaceous to Recent
	The common snapping turtle (Chelydra serpentina)
التصنيف العلمي
أصنوفة غير معروفة (أصلحها):	Chelydridae
الأجناس
	Chelydra; Macrochelys; †Acherontemys; †Chelydrops; †Chelydropsis; †Emarginachelys; †Macrocephalochelys; †Planiplastron; †Protochelydra;
Synonyms
	Chelydrae Gray, 1831:4; Chelydridae Swainson, 1839:113; Chelydradae Gray, 1869:178;

الدلهميات Chelydridae هي فصيلة من السلاحف تضم سبعة أجناس منقرضة وجنسين موجودين. الأجناس الموجودة هي السلاحف العضاضة، Chelydra و Macrochelys. وكلاهما موطنه نصف الكرة الغربي. الأجناس المنقرضة هي Acherontemys, Chelydrops, Chelydropsis, Emarginachelys, Macrocephalochelys, Planiplastron, و Protochelydra.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

التاريخ الأحفوري

Chelydropsis murchisoni fossil remains (يسار: juvenile; right: adult)

The Chelydridae have a long fossil history, with extinct species reported from North America as well as all over Asia and Europe, far outside their present range. The earliest described chelydrid is Emarginachelys cretacea, known from well-preserved fossils from the Maastrichtian stage of the Late Cretaceous of Montana.^[1] Another well-preserved fossil chelydrid is the Late Paleocene Protochelydra zangerli from North Dakota.^[6] The carapace of P. zangerli is higher-domed than that of the recent Chelydra, a trait conjectured to be associated with the coexistence of large, turtle-eating crocodilians. Another genus, Chelydropsis, contains several well-known Eurasian chelydrid species that existed from the Oligocene to the Pliocene.^[7] In South America, chelydrids (C. acutirostris) only occupy the northwestern corner of the continent, reflecting their recent arrival from Central America as part of the Great American Interchange.

معرض صور

Common snapping turtle at Taum Sauk Mountain State Park
Two-year-old captive-raised snapping turtle from Pennsylvania
Female next to can to show size
Skeleton of alligator snapping turtle at the Museum of Osteology
Female Snapping Turtle laying eggs (not visible), Pleasant Valley Wildlife Sanctuary, لنوكس، مساتشوستس
Female laying eggs

انظر أيضاً

المراجع

^ ^أ ^ب Emarginachelys cretacea, Paleobiology Database
^ ^أ ^ب Gray, John Edward. (1831). Synopsis Reptilium; or Short Descriptions of the Species of Reptiles. Part I.—Cataphracta. Tortoises, Crocodiles, and Enaliosaurians. London: Treuttel, Wurz, and Co., 85 pp. [Published May 1831].
^ Turtle Taxonomy Working Group [van Dijk, P.P., Iverson, J.B., Shaffer, H.B., Bour, R., and Rhodin, A.G.J.]. (2012). Turtles of the World, 2012 update: annotated checklist of taxonomy, synonymy, distribution, and conservation status. Chelonian Research Monographs No. 5, pp. 000.243–000.328, doi:10.3854/crm.5.000.checklist.v5.2012, "Archived copy" (PDF). Archived from the original (PDF) on 2013-06-16. Retrieved 2014-04-19.{{cite web}}: CS1 maint: archived copy as title (link)
^ Swainson, William. (1839). On the natural history and classification of fishes, amphibians, and reptiles. Vol. II. In: Lardner, D. (Ed.). The Cabinet Cyclopaedia. Natural History. London: Longman, 452 pp.
^ Gray, John Edward. (1869). Notes on the families and genera of tortoises (Testudinata), and on the characters afforded by the study of their skulls. Proceedings of the Zoological Society of London 1869:165–225.
^ Danilov G. and J. F. Parham. (2008). A reassessment of some poorly known turtles from the Middle Jurassic of China, with comments on the antiquity of extant turtles. Journal of Vertebrate Paleontology 28(2):306-318
^ Böhme, M. (2008). Ectothermic vertebrates (Teleostei, Allocaudata, Urodela, Anura, Testudines, Choristodera, Crocodylia, Squamata) from the Upper Oligocene of Oberleichtersbach (Northern Bavaria, Germany). Courier Forschungsinstitut Senckenberg 260:161-183

للاستزادة

de Broin, F. (1969). Contribution a l'etude des cheloniens. Cheloniens continentaux du Cretace Superieur et du Tertiaire de France. Memoires du Muséum National d'Histoire Naturelle. Vol. C, No. XXVIII.
Ericson, B.R. (1973). A new chelydrid turtle (Protochelydra zangerli), from the late Paleocene of North Dakota. Scientific Publications of the Science Museum of Minnesota, New Series. 2(2):1-16.
Gaffney, E.S. (1975). Phylogeny of the chelydrid turtles: a study of shared derived characters in the skull. Fieldiana Geology 33:157-178.
Parham, J.F., C.R. Feldman, and J.R. Boore (2006). The complete mitochondrial genome of the enigmatic bigheaded turtle (Platysternon): description of unusual genomic features and the reconciliation of phylogenetic hypotheses based on mitochondrial and nuclear DNA. BMC Evol Biol. 6: 11. Published online February 7, 2006. DOI:10.1186/1471-2148-6-11.
Whetstone, K.N. (1978). A new genus of cryptodiran turtles (Testudinoidea, Chelydridae) from the Upper Cretaceous Hell Creek Formation of Montana. The University of Kansas Science Bulletin 51(17):539-563.

وصلات خارجية

Media related to Chelydridae at Wikimedia Commons
Information related to Chelydridae from Wikispecies.

قالب:Chelydridae

[PB-1] أ ^ب Emarginachelys cretacea, Paleobiology Database

[gray1831-2] أ ^ب Gray, John Edward. (1831). Synopsis Reptilium; or Short Descriptions of the Species of Reptiles. Part I.—Cataphracta. Tortoises, Crocodiles, and Enaliosaurians. London: Treuttel, Wurz, and Co., 85 pp. [Published May 1831].

[ttwg-3] Turtle Taxonomy Working Group [van Dijk, P.P., Iverson, J.B., Shaffer, H.B., Bour, R., and Rhodin, A.G.J.]. (2012). Turtles of the World, 2012 update: annotated checklist of taxonomy, synonymy, distribution, and conservation status. Chelonian Research Monographs No. 5, pp. 000.243–000.328, doi:10.3854/crm.5.000.checklist.v5.2012, "Archived copy" (PDF). Archived from the original (PDF) on 2013-06-16. Retrieved 2014-04-19.{{cite web}}: CS1 maint: archived copy as title (link)

[swain1839-4] Swainson, William. (1839). On the natural history and classification of fishes, amphibians, and reptiles. Vol. II. In: Lardner, D. (Ed.). The Cabinet Cyclopaedia. Natural History. London: Longman, 452 pp.

[gray1869-5] Gray, John Edward. (1869). Notes on the families and genera of tortoises (Testudinata), and on the characters afforded by the study of their skulls. Proceedings of the Zoological Society of London 1869:165–225.

[6] Danilov G. and J. F. Parham. (2008). A reassessment of some poorly known turtles from the Middle Jurassic of China, with comments on the antiquity of extant turtles. Journal of Vertebrate Paleontology 28(2):306-318

[7] Böhme, M. (2008). Ectothermic vertebrates (Teleostei, Allocaudata, Urodela, Anura, Testudines, Choristodera, Crocodylia, Squamata) from the Upper Oligocene of Oberleichtersbach (Northern Bavaria, Germany). Courier Forschungsinstitut Senckenberg 260:161-183

[1]

[3]

[2]

[4]

[5]

[6]

[7]

Chelydrids Temporal range: 70.6–0 م‌س PreЄ Є O S D C P T J K Pg N Late Cretaceous^[1] to Recent

The common snapping turtle (Chelydra serpentina)
التصنيف العلمي
أصنوفة غير معروفة (أصلحها):	Chelydridae
الأجناس
Chelydra Macrochelys †Acherontemys †Chelydrops †Chelydropsis †Emarginachelys †Macrocephalochelys †Planiplastron †Protochelydra
Synonyms^[3]
Chelydrae Gray, 1831:4^[2] Chelydridae Swainson, 1839:113^[4] Chelydradae Gray, 1869:178^[5]