Named By: David Norman - 2010.
Synonyms: Iguanodon dawsoni, Torilion.
Classification: Chordata, Reptilia, Dinosauria, Ornithischia, ornithopod.
Species: B. dawsoni (type).
Size: Roughly about 8 meters long.
Known locations: England, Sussex - Wadhurst Clay.
Time period: Valanginian of the Cretaceous.
Fossil representation: Partial hip.
Originally named as a species of Iguanodon by Richard Lydekker in 1888, the holotype fossils of this genus were actually named as a new genus twice in 2010, in two separate papers published that year. The holotype specimen was first named by David Norman as Barilium, and then by Kenneth Carpenter and Yusuke Ishida as Torilion. Since Norman’s paper was published first, under international rules governing the naming of animals, Barilium has priority. Carpenter and Ishida also named a second genus called Sellacoxa from another hip, but Norman has claimed this as a further specimen of Barilium. This is why Sellacoxa is sometimes credited with being a synonym to Barilium by some and a distinct genus by others.
- Note on a new Wealden iguanodont and other dinosaurs. - Quarterly Journal of the Geological Society of London 44: 46–61. - Richard Lydekker - 1888.
- A taxonomy of iguanodontians (Dinosauria: Ornithopoda) from the lower Wealden Group (Cretaceous: Valanginian) of southern England. - Zootaxa 2489: 47–66. David Norman - 2010.
- Early and ‘Middle’ Cretaceous Iguanodonts in Time and Space. - Journal of Iberian Geology, 36 (2): 145-164. - Kenneth Carpenter & Yusuke Ishida - 2010.