Okurodani Formation
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The Okurodani Formation is an Early Cretaceous geologic formation in central Honshu, Japan. Part of the Tetori Group, it primarily consists of freshwater continental sediments deposited in a floodplain environment, with occasional volcanic tuffite horizons. It has an uncertain age, probably dating between the Hauterivian and Aptian.[1] An indeterminate iguanodontian dinosaur tooth has been recovered from the formation. Many other fossil vertebrates are known from the KO2 locality[2]
Vertebrate Paleobiota
Amphibians
| Amphibians reported from the Okurodani Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Anura | Indeterminate | KO2 | Discoglossid grade | |||
| Caudata | Indeterminate | KO2 | ||||
Squamates
| Squamates reported from the Okurodani Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Sakurasaurus[3] | S. shokawensis | KO2 | ||||
| ?Anguimorpha | Indeterminate | KO2 | ||||
| Scincomorpha | Indeterminate | KO2 | new taxon | |||
| Squamata | Indeterminate | KO2 | 2 distinct taxa | |||
Turtles
| Turtles reported from the Okurodani Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| cf. Sinemys | Indeterminate | KO2 | ||||
| Sinochelys | Indeterminate | KO2 | Sinochelyidae | |||
| Adocidae | Indeterminate | KO2 | ||||
| Trionychidae | Indeterminate | KO2 | ||||
Choristoderes
| Choristoderes reported from the Okurodani Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Monjurosuchus | Indeterminate | KO2 | "Association of right squamosal, jugal, quadratojugal, and quadrate" |
| ||
| Shokawa | S. ikoi | KO2 | Partial skeleton | |||
See also
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Footnotes
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References
- Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. Template:ISBN.
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