User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-4051526-20130918154826/@comment-4009941-20130918213937

Black Gravios is the result of a Basarios or I guess very young adult Gravios collecting to much heat without cooling down and is burnt black to the bone so its possible the Basarios subspecies could grow into either just like normal Basa could.