Xinlong Formation | |
---|---|
Stratigraphic range: ?Aptian-Albian ~ | |
Type | Geological formation |
Lithology | |
Primary | Sandstone, mudstone |
Other | Conglomerate, marl |
Location | |
Coordinates | 22°36′N107°54′E / 22.6°N 107.9°E |
Approximate paleocoordinates | 23°12′N116°06′E / 23.2°N 116.1°E |
Region | Guangxi |
Country | China |
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]
Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation. [3]
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 member of Carcharodontosauria | |||
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
| Notes Uncertain or tentative taxa are in small text; |
Siamotyrannus is a genus of theropod dinosaur from the early Cretaceous of Thailand.
Asiatosaurus is an extinct genus of herbivorous sauropod dinosaur which lived during the Early Cretaceous in Mongolia and China. The type species is known only from teeth, making it difficult to rely on information until more specimens are found to expand our knowledge, and another species is known, also based on scant remains; both are now classified as nomina dubia.
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The Sao Khua Formation is a middle member of the Khorat Group. It consists of an alteration of pale red to yellowish-gray, fine to medium-grained sandstone and grayish-reddish brown siltstone and clay. Rare pale red to light gray conglomerates, containing carbonate pebbles, are also characteristic of this formation. This geological formation in Thailand dates to the Early Cretaceous age, specifically the Valanginian through Hauterivian stages.
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The Early Cretaceous Phu Kradung Formation is the lowest member of the Mesozoic Khorat Group which outcrops on the Khorat Plateau in Isan, Thailand. This geological formation consists of micaceous, brown to reddish-brown siltstone beds with minor brown and grey shale and sandstone beds. Occasional lime-noduled conglomerate occurs.
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Yunmenglong is an extinct genus of somphospondylan sauropod known from the late Early Cretaceous of Henan Province, central China. Its remains were discovered in the Haoling Formation of the Ruyang Basin. The type species is Yunmenglong ruyangensis, described in 2013 by Junchang Lü et al. on the basis of an incomplete postcranial skeleton. Yunmenglong shares some characters with Euhelopus, Qiaowanlong and Erketu, and a phylogenetic analysis places it as a sister taxon of Qiaowanlong, both grouped with Erketu in a position more derived than Euhelopus but basal to Titanosauria.
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The year 2009 in Archosaur paleontology was eventful. Archosaurs include the only living dinosaur group — birds — and the reptile crocodilians, plus all extinct dinosaurs, extinct crocodilian relatives, and pterosaurs. Archosaur paleontology is the scientific study of those animals, especially as they existed before the Holocene Epoch began about 11,700 years ago. The year 2009 in paleontology included various significant developments regarding archosaurs.
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