"Sinopliosaurus" fusuiensis

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

Temporal range: Early Cretaceous, 125.45–112.6 Ma
"Sinopliosaurus" fusuiensis by PaleoGeek.png
Speculative life restoration and fossil tooth
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Superorder: Dinosauria
Order: Saurischia
Suborder: Theropoda
Family: Spinosauridae
Genus: "Sinopliosaurus"

"Sinopliosaurus" fusuiensis
Hou, Yeh & Zhao, 1975

"Sinopliosaurus" fusuiensis is a spinosaurid theropod dinosaur from the Early Cretaceous Napan Formation of Guangxi Province, southern China. It is known only from four teeth, which came from an animal similar to Siamosaurus.

History of research[edit]

In 1975, five fossil teeth were described by Chinese palaeontologists Hou Lian-Hai, Yeh Hsiang-K'uei, and Zhao Xi-Jin. The specimens were collected from the Napan Formation of the Guangxi Province in southern China, and assigned by Hou and colleagues to a new species of Sinopliosaurus, a plesiosaur known only from limb elements found in the Early Jurassic.[1] A 2008 paper by Eric Buffetaut and colleagues referred the four of the original specimens (one was not found in the museum collection) to a new species of spinosaurid dinosaur.[2]


Out of the four teeth referred to "S" fusuiensis, three were in a bad state of preservation, therefore the description was based on the most intact specimen (IVPP V 4793). It is partially deformed and missing the uppermost part of the tip, the crown of the tooth is 6.9 cm (2.7 in) long, measuring 1.3 cm by 1.65 cm (0.5 in by 0.6 in) at its base. A distinct series of ridges are present along the length of the crown, with the gaps between them having fine wrinkle-like structures; these features have been observed in spinosaurid teeth recovered from Japan and Thailand. The most close resemblance is to the teeth of Siamosaurus from the Sao Khua Formation.[2]


  1. ^ Hou, L., Yeh, H. and Zhao, X. (1975). Fossil reptiles from Fusui, Kwangshi. Vertebrata PalAsiatica 13; 24-33
  2. ^ a b Buffetaut, Eric; Suteethorn, Varavudh; Tong, Haiyan; Amiot, Romain (2008-09-01). "An Early Cretaceous spinosaurid from southern China". Geological Magazine. 145: 745–748. doi:10.1017/S0016756808005360.