List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Procolophonidae
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Pentaedrusaurus ordosianus n. gen., n. sp.
Li 1989
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1 individual | |||||||||
| IVPP V 8735 (type) | ||||||||||
| see common names | ||||||||||
Geography
| Country: | China | State/province: | Shaanxi | County: | Fugu |
| Coordinates: | 39.4° North, 111.1° East (view map) | ||||
| Paleocoordinates: | 39.6° North, 89.2° East | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | hand sample |
Stratigraphy
| Formation: | Heshanggou | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: "Upper Heshanggou Fm. Early Triassic" (Li, 1989 tab. 4). "Lower assemblage" of the Heshanggou Formation of the Ordos Basin, the age of which is based entirely upon biostratigraphy (see Nesbitt et al. 2011, Earth Env. Sci. Trans. Roy. Soc. Edinburgh). Vertebrate biostratigraphy (presence of the Anisian taxon Kannemeyeria in the overlying "upper assemblage" of the Heshanggou and presence of the Early Triassic Proterosuchus in the "lower assemblage") as well as plant and microspore data suggests an Olenekian-earliest Anisian age (Nesbitt et al. 2011, Earth Env. Sci. Trans. Roy. Soc. Edinburgh) | |||||
Lithology and environment
| Primary lithology: | green,red "siliciclastic" |
| Lithology description: "purplish-red sandstone and mudstone intercalated with greenish-gray sandstone [...] belong to the lacustrine facies" (general lithology description of the Heshanggou Fm. as given by Jinhua, 1996, p. 255 in Zhou & Dean (eds.) Phanerozoic Geology of Northwest China) | |
| Environment: | lacustrine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | good |
| Articulated whole bodies: | none |
| Associated major elements: | all |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | IVPP |
| Taxonomic list comments:Li (1989) gives no catalogue number for the holotype of Pentaedrusaurus ordosianus (at least not in the english part of the paper). Cisneros (2008, J. Syst. Paleont. 6(3)) gives IVPP V 8735 as catalogue number for a specimen of P. ordosianus without explicit statement that it represents the holotype. The drawings by Cisneros (2008 figs. 1D, J) compared to the drawings and photographs in Li (1989 figs. 1, 3; pl. II) suggest, however, that the specimen mentioned and figured by Cisneros (2008) is the holotype (furthermore it appears that no other than the type specimen was found to date). | |
Metadata
| Also known as: | type locality of Pentaedrusaurus ordosianus | ||
| Database number: | 92429 | ||
| Authorizer: | J. Mueller | Enterer: | T. Liebrecht |
| Modifier: | R. Butler | Research group: | vertebrate |
| Created: | 2009-11-12 11:18:27 | Last modified: | 2011-09-22 05:35:39 |
| Access level: | authorizer only | Released: | 2012-11-12 11:18:27 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 31163. | J.-L. Li. 1989. [A new genus of Procolophonidae from Lower Triassic of Shaanxi, China]. Vertebrata PalAsiatica 27(4):248-267 [J. Mueller/T. Liebrecht/G. Lloyd] |