10 Terrifying Prehistoric Creatures We Should See In A Movie

The same concept as the meganeura applies here, but to a far greater extent, as anyone who has a disdain for the world of bugs and insects would find this creature to be the worst possible being to have ever existed. Those who find millipedes and centipedes to be some of their biggest phobias would probably struggle to even bear thinking about the existence of this extinct millipede arthropod.

Arhtropleura is the largest known land invertebrate to have ever existed, and is predicted to have had little to no threat from predators whatsoever. It could grow up to 2.5 metres long, thanks to its existence in the lower Carboniferous period. This was a time when the greater partial pressure of oxygen in the Earth's atmosphere allowed creatures like this (and the meganeura) to grow to huge sizes. This was also helped by a lack of predators at the time.

It is commonly known that Arthropleura were herbivores, which would mean that a film adaptation might have to take liberties to make them a physical threat. However, even ignoring this and allowing them to be vegetarian doesn't take away the creep factor that these giant insects had.