User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-1758220-20130209000823

http://www.capcom-unity.com/dubindoh/go/gallery/view/3569015?pg=1

Very possible evidence of Gigginox Subspecies' localized name:

BALEFUL GIGGINOX

Yuri has put together a compilation of fan art, and the one that features both species of Gigginox is entitled (by Yuri himself) "Gigginox and Baleful Gigginox

Obviously I'll await official confirmation, but don't be surprised if this turns out to be the official name.