User blog comment:Kogath/Monster Hunter X Discussion/@comment-6050823-20150708142325

Some Info From The Latest Famitsu Scans On MHX(Note got this from some blogs so not entirely gratitude that all of this is true)

Dinovaldo
 * Dinovaldo's name comes from a combination of Dinosaur(恐竜) and Blade(刃).
 * Dinovaldo sharpens its blade-like tail in its mouth to give itself powerful fiery explosions with its tail. The range of these explosions give Dinovaldo much greater with some of it's attacks so hunters must be aware with each attack it performs with its tail.
 * The tail is said to be made of some special material.

Maccau and Great Maccau
 * Great Maccau shows its leadership with the feathers on its head and tail.
 * Great Maccau seems to not just use its tail but also its arms for attacking(This one I'm not entirely certain about).
 * The Maccau are said to be the juvenile form of Great Maccau.