User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-9083744-20130503234356/@comment-5020152-20130507124723

^ Piscene wyverns, except Delex, are built much the same way as true wyverns like Rathalos - two wings, two legs, no forearms.

@Aandrew: Just because a wyvern in mythology is what you said it was (bipedal winged monster with no forearms), that doesn't mean the game has to follow it. Brute Wyverns are wyverns because the game calls them so. Same with Raptor Wyverns and giant Pseudowyverns.