Zhuengeerqi (upper He-Shang-Gou Formation): Olenekian - Anisian, China

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Procolophonidae
Eumetabolodon bathycephalus n. gen., n. sp. Li 1983
1 individual
IVPP V 6064 (type)
see common names

Geography
Country:China State/province:Nei Mongol County:Zhuengeerqi
Coordinates: 39.7° North, 111.0° East (view map)
Paleocoordinates:39.9° North, 89.2° East
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period:Triassic
*Period:Early/Lower Triassic *Epoch:Scythian
Key time interval:Olenekian - Anisian
Age range of interval:251.20000 - 242.00000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Heshanggou
Stratigraphic resolution:bed
Stratigraphy comments: Original formation name spelling >>He-Shang-Gou<< is replaced by the much more common spelling >>Heshanggou<<. (TL)
"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:red lithified sandstone
Lithology description: "the bone is invariably soft and embedded in hard red sandstone."
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Preservation of anatomical detail:good
Articulated whole bodies:none
Associated major elements:some
Disassociated major elements:some
Disassociated minor elements:none
Size sorting:medium
Fragmentation:frequent
Temporal resolution:time-averaged
Collection methods and comments
Collection methods:surface (float),mechanical,field collection
Reason for describing collection:taxonomic analysis
Museum repositories:IVPP
Collection method comments: The holotype specimen from this locality (He-Shang-Gou Formation) is in good condition- A second specimen is noted from "the Er-Ma-Ying Formation at Zhungeerqi, Inner Mongloia". 16 additional individuals of the same taxon collected from the nearby (17.5 km) Gucheng locality are "in rather poor condition."
Metadata
Also known as:Zhun ge er qi (He-Shan-Kou Formation); Ordos Basin
Database number:27134
Authorizer:J. Alroy Enterer:R. Whatley
Modifier:R. Butler Research group:vertebrate
Created:2002-11-19 20:25:51 Last modified:2011-09-22 05:34:26
Access level:the public Released:2002-11-19 20:25:51
Creative Commons license:CC BY
Reference information

Primary reference:

7511.5% 26400J. L. Li. 1983. Tooth replacement in a new genus of procolophonid from the Early Triassic of China. Palaeontology 26(3):567-583 [J. Alroy/R. Whatley/T. Liebrecht]