Gore-illa said:
Dude, that are genres, not sub-genres

For example.. Death metal is a genre, and some sub-genres are brutal death metal, melodic death metal, death/grind etc.
uh no genres would be considered metal, country, punk, rock, rap, reggae, classical, etc. He's talking about sub-genres of metal such as death metal, power metal, thrash metal, heavy metal, black metal, etc.
Anyway, here are the basic genres and examples of those genres (not sub-sub-genres such as gore metal and viking metal and this doesn't include metalcore):
Heavy Metal (Iron Maiden, Judas Priest, Deep Purple)
Doom Metal (Candlemass, Black Sabbath)
Thrash Metal (Megadeth, Slayer, (old) Metallica, Slayer, Testament)
Speed Metal (Judas Priest (painkiller album), Motorhead)
Power Metal (Manowar, Iced Earth, Helloween)
Black Metal (Emperor, Venom, Mayhem, Darkthrone, Immortal)
Death Metal (Deicide, Obituary, Morbid Angel, Cannibal Corpse)