Lianmuqin Formation

The Lianmuqin Formation,^[2] also transcribed as Lianmugin Formation,^[3] and Lianmuxin Formation,^[4] is an Early Cretaceous geologic formation composed of "interbedded red green and yellow variegated mudstones and siltstones".^[5][6] Dinosaur remains have been recovered from it.^[7]

Lianmuqin Formation
Stratigraphic range: Aptian–Albian[1] PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Unit of	Tugulu Group
Underlies	Donggou & Kumutake Formations
Overlies	Shengjinkou Formation
Thickness	213–360 m (699–1,181 ft)
Lithology
Primary	Mudstone, siltstone
Location
Coordinates	46.0°N 85.8°E / 46.0; 85.8
Approximate paleocoordinates	45.0°N 81.9°E / 45.0; 81.9
Region	Xinjiang
Country	China
Extent	Junggar Basin
Type section
Named for	Lianmuqin
Lianmuqin Formation (China) Show map of China Lianmuqin Formation (Dzungaria) Show map of Dzungaria

The formation is named after Lianmuqin Town in Shanshan County, Xinjiang.

Vertebrate paleofauna

Dinosaurs

Dinosaurs of the Lianmuqin Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Asiatosaurus[8]	A. mongoliensis[8]	NW Junggar Basin
Kelmayisaurus[8][9]	K. petrolicus[8]	NW Junggar Basin		"Maxilla and dentary."[10]
Xinjiangovenator	X. parvus	NW Junggar Basin		"Tibia [and] phalanges."[11]	Formerly thought to be a representative of Phaedrolosaurus ilikensis.[8]
Phaedrolosaurus	P. ilikensis	NW Junggar Basin		"tooth"[12]
Psittacosaurus[8]	P. xinjiangensis[8]	NW Junggar Basin
Tugulusaurus[8]	T. faciles[8]	NW Junggar Basin		"Hindlimb, rib, [and a] vertebral centrum."[13]
Wuerhosaurus[8]	W. homheni[8]	NW Junggar Basin		"Partial skeleton."[14]

Pterosaurs

Pterosaurs of the Lianmuqin Formation
Genus	Species	Location	Stratigraphic position	Abundance	Notes	Images
Dsungaripteridae indet.[15]	indeterminate[15]	Southern Junggar Basin			Not referable to Lonchognathosaurus or Dsungaripterus; likely a new taxon.[15]
Dsungaripterus	D. weii[16]	NW Junggar Basin				Dsungaripterus and Noripterus
Noripterus	N. complicidens[17]	NW Junggar Basin
Lonchognathosaurus	L. acutirostris[17]	Southern Junggar Basin			Possible junior synonym of Dsungaripterus weii.[18]
Ornithocheiromorpha Indet.[19]	Indeterminate

Plesiosaurs

Name	Species	Location	Stratigraphic position	Abundance	Notes	Images
Sinopliosaurus	S. weiyuanensis	NW Junggar Basin		Three vertebrae and a tooth.[20][21]	Dubious genus of plesiosaur.

Crurotarsans

Name	Species	Location	Stratigraphic position	Abundance	Notes	Images
Edentosuchus	E. tienshanensis[22]	NW Junggar Basin

Turtles

Name	Species	Location	Stratigraphic position	Abundance	Notes	Images
Dracochelys	D. bicuspis	Southern Junggar Basin			[23]
Ordosemys	O. brinkmania	NW Junggar Basin			[23]
Wuguia	W. efremovi	Southern Junggar Basin			[23]
Xinjiangchelys	X. sp.	NW Junggar Basin			[23]

Color key Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon		Notes Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

See also

• List of dinosaur-bearing rock formations
  • List of stratigraphic units with few dinosaur genera