Meng-Yin Formation

Meng-Yin Formation Stratigraphic range: Berriasian-Valanginian ~145–133 Ma PreЄ Є O S D C P T J K Pg N
Type	Geological formation
Lithology
Primary	Sandstone
Other	Siltstone
Location
Coordinates	[ ⚑ ] : 35°54′N 118°00′E / 35.9°N 118.0°E / 35.9; 118.0
Paleocoordinates	[ ⚑ ] 36°54′N 120°12′E / 36.9°N 120.2°E / 36.9; 120.2
Region	Shandong
Country	China
Meng-Yin Formation (China) Show map of China Meng-Yin Formation (Shandong) Show map of Shandong

The Meng-Yin or Mengyin Formation (simplified Chinese: 蒙阴组; traditional Chinese: 蒙陰組; pinyin: Méngyīn Zǔ) is a geological formation in Shandong, China, whose strata date back to the Berriasian and Valanginian stages of the Early Cretaceous.^[1][2]

Dinosaur remains are among the fossils that have been recovered from the formation.^[3] The type material for the titanosauriform dinosaur Euhelopus was excavated at this formation by Otto Zdansky in 1923, in green/yellow sandstone and green/yellow siltstone that were deposited during the Barremian or Aptian stages of the Cretaceous period, approximately 129 to 113 million years ago.^[4]

Both the genus and species of Mengyinaia mengyinensis were named after the formation.

Vertebrate paleofauna

Indeterminate stegosaurid remains have been found in Shandong, China.^[3]

Vertebrates from the Meng-Yin Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Euhelopus[3]	E. zdanskyi[3]	Shandong[3]		"Skull and partial postcranial skeleton, additional fragmentary skeleton."[5]
Mengshanosaurus	M. minimus			A choristodere belonging to Neochoristodera

Other fossils

• Mengyinaia mengyinensis^[6]

Fish

• Sinamia zdanskyi
• Tanichthys ningjiagouensis
• Lycoptera sp.

Reptiles

• Ordosemys leios
• Shantungosuchus chuhsienensis^[7]
• Sinemys lens
• Sinochelys applanata
• ?Dsungaripteridae indet.
• Stegosauria indet.

See also

• List of dinosaur-bearing rock formations

References

Bibliography

• Fang, Z. J.; J. H. Chen; C. Z. Chen; J. G. Sha; X. Lan, and S. Z. Wen. 2009. Supraspecific taxa of the Bivalvia first named, described, and published in China (1927-2007). The University of Kansas Paleontological Contributions 17. 1–157.
• Wilson, Jeffrey A., and Paul Upchurch. 2009. Redescription and reassessment of the phylogenetic affinities of Euhelopus zdanskyi (Dinosauria:Sauropoda) from the Early Cretaceous of China. Journal of Systematic Palaeontology 7. 199–239. doi:10.1017/S1477201908002691
• Young, C.-C. 1961. On a new crocodile from Chuhsien, E. Shantung. Vertebrata PalAsiatica 5. 6–10.
• Wiman, C. 1929. Die Kreide-Dinosaurier aus Shantung - The Cretaceous dinosaurs of Shantung. Palaeontologia Sinica, Series C 6. 1–67.
• T'an, H. C.. 1923. New research on the Mesozoic and early Tertiary geology in Shantung. Geological Survey of China Bulletin 5. 95–135.

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