Tianchisaurus

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Tianchisaurus
Fossil range: Middle Jurassic
Conservation status
Extinct (fossil)
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Superorder: Dinosauria
Order: Ornithischia
Suborder: Thyreophora
Infraorder: Ankylosauria
Family: Ankylosauridae?
Genus: Tianchiasaurus
Binomial name
Tianchiasaurus nedegoapeferima
Dong, 1993

Tianchisaurus ("heavenly pool lizard") is a genus of ankylosaurian dinosaur from the middle Jurassic Period (Bajocian-Bathonian stages) of China. If it truly belongs to the family Ankylosauridae as proposed by Dong Zhiming, it would be the earliest member of that family. Unlike other ankylosaurids, it lacked a bony club at the tip of its tail.

The type specimen was informally referred to as "Jurassosaurus" after the 1993 film Jurassic Park, and the binomial T. nedegoapeferima is formed from the surnames of the film's main stars: Sam Neil, Laura Dern, Jeff Goldblum, Sir Richard Attenborough, Bob Peck, Martin Ferrero, Ariana Richards, and Joseph Mazzello. Director Steven Spielberg, who has funded Chinese dinosaur research, proposed the name. Dong Zhiming ultimately discarded the genus name "Jurassosaurus" (which is now a nomen nudum) in favor of Tianchiasaurus, but retained the species name honoring the actors.