User blog comment:BannedLagiacrus/Discussion of the Week: Extinct and Unknown Status Monsters/@comment-6050823-20140531141605/@comment-4009941-20140531154529

If you think about it since Igurueibisu came before Keputosu, its like saying Igurueibisu started as a featherless raptor then started reversing into the weird Velociprey raptor that turns into all the other raptors in MH.