User blog comment:Kogath/Monster Hunter X Discussion/@comment-184612-20151109230039/@comment-184612-20151110042857

@Nargacugamainic;

Officially, the name is almost EXACTLY like the name they use for Hardcore monsters in Japan.

特異個体 = Frontier HC Monsters 特殊個体 = MHX HC Monsters

They're even being handled the same in some ways; Tickets required to fight them, tools being ineffective, etc.

Right now, the main difference is that these MHX ones get a unique title (all monsters get titles in Japan, but normally HC monsters are considered the same as their base species).