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• Odontochelys abstract "Odontochelys semitestacea is the oldest known extinct species of turtles. It is the only known species in the genus Odontochelys and the family Odontochelyidae. O. semitestacea was first described from three 220 million year-old specimens excavated in Triassic deposits in Guizhou, China.Odontochelys differed grossly from modern turtles. Modern turtles possess a horny beak without any teeth in their mouth. In contrast, Odontochelys fossils were found to have had teeth embedded in their upper and lower jaws. One of the most striking features of turtles, both modern and prehistoric alike, are their dorsal shells, forming an armored carapace over the body of the animal. Odontochelys only possessed the bottom portion of a turtle's armor, the plastron. It did not yet have a solid carapace as most other turtles do. Instead of a solid carapace, Odontochelys possessed broadened ribs like those of modern turtle embryos that still have not started developing the ossified plates of a carapace.Aside from the presence of teeth and the absence of a solid carapace, a few other skeletal traits distinguish Odontochelys as basal compared to other turtles, extant and otherwise. The point of articulation between the dorsal ribs and the vertebrae are decidedly different in Odontochelys than in later turtles. In a comparison of skull proportions, the skull of Odontochelys is far more elongated pre-orbitally (in front of the eyes) compared to other turtles. The tail of the prehistoric turtle was longer in proportion to its body than other turtles. In addition, the transverse processes found in the tail are not fused such as in later turtles. Also, the scapulae of the examined specimens were identified to lack acromion processes. Taken together, these anatomical differences have been interpreted by the discoverers to mean that Odontochelys has some of the most primitive features ever seen in a turtle and is somewhat of a transitional fossil. Some scientists, however, are skeptical of this idea. Reisz and Head propose that Odontochelys does not represent a turtle with a partly evolved shell, but that it is a descendant of an older, land–living turtle, and that the shell became reversed. Such shells can be seen on modern turtles, like the leatherback turtles (the genus Dermochelys).It is likely that Odontochelys was aquatic, as the fossil specimens were found in marine deposits rife with conodonts and ammonites. It is theorized that the primitive turtle frequented shallow marine waters close to shore.The species' name, Odontochelys semitestacea literally means "toothed turtle with a half-shell" - an apt description of its most striking physical characteristics.".
• Odontochelys thumbnail Odontochelys.jpg?width=300.
• Odontochelys wikiPageExternalLink 081126-oldest-turtle.html.
• Odontochelys wikiPageExternalLink 27929375.
• Odontochelys wikiPageExternalLink nature07533_ft.html.
• Odontochelys wikiPageID "20417342".
• Odontochelys wikiPageRevisionID "589559489".
• Odontochelys authority "Li et al., 2008".
• Odontochelys displayParents "3".
• Odontochelys fossilRange "Late Triassic,".
• Odontochelys genus "Odontochelys".
• Odontochelys grandparentAuthority "Li et al., 2008".
• Odontochelys hasPhotoCollection Odontochelys.
• Odontochelys imageCaption "Fossil".
• Odontochelys imageWidth "250".
• Odontochelys name "Odontochelys".
• Odontochelys parentAuthority "Li et al., 2008".
• Odontochelys species "semitestacea".
• Odontochelys subject Category:Fossil_taxa_described_in_2008.
• Odontochelys subject Category:Transitional_fossils.
• Odontochelys subject Category:Triassic_turtles.
• Odontochelys type Adult109605289.
• Odontochelys type CausalAgent100007347.
• Odontochelys type Dodo110022908.
• Odontochelys type LivingThing100004258.
• Odontochelys type Object100002684.
• Odontochelys type Oldster110376523.
• Odontochelys type Organism100004475.
• Odontochelys type Person100007846.
• Odontochelys type PhysicalEntity100001930.
• Odontochelys type TransitionalFossils.
• Odontochelys type Whole100003553.
• Odontochelys type YagoLegalActor.
• Odontochelys type YagoLegalActorGeo.
• Odontochelys type Reptile.
• Odontochelys comment "Odontochelys semitestacea is the oldest known extinct species of turtles. It is the only known species in the genus Odontochelys and the family Odontochelyidae. O. semitestacea was first described from three 220 million year-old specimens excavated in Triassic deposits in Guizhou, China.Odontochelys differed grossly from modern turtles. Modern turtles possess a horny beak without any teeth in their mouth.".
• Odontochelys label "Odontochelys semitestacea".
• Odontochelys label "Odontochelys semitestacea".
• Odontochelys label "Odontochelys".
• Odontochelys label "Odontochelys".
• Odontochelys label "Odontochelys".
• Odontochelys label "Odontochelys".
• Odontochelys label "Odontochelys".
• Odontochelys label "Odontochelys".
• Odontochelys label "Odontochelys".
• Odontochelys label "オドントケリス".
• Odontochelys label "半甲齒龜".
• Odontochelys sameAs Odontochelys.
• Odontochelys sameAs Odontochelys.
• Odontochelys sameAs Odontochelys.
• Odontochelys sameAs Odontochelys.
• Odontochelys sameAs Odontochelys.
• Odontochelys sameAs Odontochelys_semitestacea.
• Odontochelys sameAs オドントケリス.
• Odontochelys sameAs Odontochelys.
• Odontochelys sameAs Odontochelys.
• Odontochelys sameAs Odontochelys.
• Odontochelys sameAs m.04zxq2n.
• Odontochelys sameAs Q131325.
• Odontochelys sameAs Q131325.
• Odontochelys sameAs Odontochelys.
• Odontochelys wasDerivedFrom Odontochelys?oldid=589559489.
• Odontochelys depiction Odontochelys.jpg.
• Odontochelys isPrimaryTopicOf Odontochelys.