Board Thread:Monster Discussions/@comment-37118093-20181213000108/@comment-25322628-20181218064602

I'm following Legendary Pictures, which states that Godzilla's species is from the Permian-Triassic Era, over 250-million years ago, before surface radiation began to subside.

Destoroyah's species is from the Precambrian Era, which makes it the oldest monster in existence.

Megaguirus is from the Carboniferous Era, which makes her younger than Destoroyah.