6.5m-long large theropod

Diet: carnivorous

Country: Brazil

Period: Early Cretaceous, 112-99 million years ago

Irritator was quite like Spinosaurus. It is known only from a skull, so the sail is a guess.

The type species, Irritator challengeri was named after Professor Challenger from Arthur Conan Doyle's novel 'The Lost World', published in 1912.

Taxonomic details

Taxonomy: Dinosauria, Saurischia, Theropoda, Neotherapoda, Tetanurae, Spinosauroidea, Spinosauridae, Spinosaurinae

Named by: Martill, Cruickshank, Frey, Small and Clarke (1996)

Type species: challengeri


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