Modern turtles have complex behavioral adaptations to avoid the bends, so 1. Subtaxa: Odontochelys semitestacea. Figure 3: Referred specimen (IVPP V 15653) of Odontochelys semitestacea gen. et sp. It presents taxonomic, distributional, and ecological data about the entire fossil record. View classification.
One fossil of Odontochelys indicates that it had completely messed up shoulder bones, likely due to a problem in life rather than destruction of the fossil.
This pattern resembles decompression sickness, aka the bends, aka the condition caused by a diving animal coming up much too fast from a lower depth. Odontochelys semitestacea (meaning "toothed turtle with a half-shell") is a Late Triassic relative of turtles.Before Pappochelys was discovered and Eunotosaurus was redescribed, Odontochelys was considered the oldest undisputed member of Pantestudines (i.e. Ecology: Fossilworks hosts query, analysis, and download functions used to access large paleontological data sets. Guizhou Triassic Fossil Sites World Natural Heritage Nominated Property is located in Guizhou Province, south-western China.
The position of turtles among amniotes remains one of the oldest and most contentious problems in vertebrate systematics. Keywords: turtle, Diapsida, molecular clock, transitional fossil, Eunotosaurus africanus, Odontochelys semitestacea.
This is supported by fossils of the freshwater Odontochelys semitestacea, the "half-shelled turtle with teeth", have been found near Guangling in south-west China, which displays a complete bony plastron and an incomplete carapace, similar to an early stage of turtle embryonic development.
Odontochelys semitestacea (meaning "toothed turtle with a half-shell") is the oldest known extinct species of turtles.It is the only known species in the genus Odontochelys and the family Odontochelyidae.O. Introduction. 2000; Hugall et al. a stem-turtle).It is the only known species in the genus Odontochelys and the family Odontochelyidae.
semitestacea was first described from three 220-million-year-old specimens excavated in Triassic deposits in Guizhou, China. The Nominated Property is composed of four components including Panxian Fauna, Xingyi Fauna-Wusha, Xingyi Fauna-Dingxiao and Guanling Biota, covering 82.43 km2 in total with the nominated property and buffer zone of 19.97 km2 and 62.46 km2 respectively. Gateway to the Paleobiology Database Full search. Three hypotheses are viable (figure 1): turtles are the extant sister to (i) the crocodile–bird clade (Cao et al.