Xinlong Formation

The Xinlong Formation (sometimes called the "Napai Formation", or misspelt as "Napan Formation"^[1]) is an Early Cretaceous geologic formation in Guangxi, southern China.^[2]

Xinlong Formation
Stratigraphic range: ?Aptian-Albian ~120–100 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Lithology
Primary	Sandstone, mudstone
Other	Conglomerate, marl
Location
Coordinates	22.6°N 107.9°E / 22.6; 107.9
Approximate paleocoordinates	23.2°N 116.1°E / 23.2; 116.1
Region	Guangxi
Country	China
Xinlong Formation (China) Show map of China Xinlong Formation (Guangxi) Show map of Guangxi

Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.^[3]

Vertebrate paleofauna

Dinosaurs

Dinosaurs of the Xinlong Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Asiatosaurus[4]	A. kwangshiensis[4]			Teeth, three cervical vertebrae and ribs	Indeterminate sauropod
Datanglong[5]	D. guangxiensis			Last dorsal (back) vertebra (according to the descriptors the fourteenth), continues over the five sacral vertebrae, and ends with the second tail vertebra. The sacrum is attached to a left ilium with the upper parts of the left pubic bone and the left ischium, and one piece of the right ilium	A Carcharodontosaurid
Fusuisaurus[6]	F. zhaoi[6]			Partial pelvis and caudal vertebrae	A titanosauriform
Liubangosaurus[7]	L. hei[7]			Fifth to ninth dorsal vertebrae	An eusauropod
Napaisaurus[8]	N. guangxiensis[8]			Right ilium and ischium	An iguanodontian
Prodeinodon[9]	P. kwangshiensis			Several teeth, fragmentary tibia, fragmentary fibula	Indeterminate theropod
Psittacosauridae?[8]	Indeterminate				Several different taxa of possible Psittacosaurid classification.
Siamosaurus[10]	Indeterminate, possibly S. fusuiensis[10]			Four teeth	Spinosaurid originally known as "Sinopliosaurus" fusuiensis[11]

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