Sub-Genres

Sub-Genres

Sub-Genres are identifiable sub-classes, almost like a sub heading within the larger film genre with their own distinctive subject matter, style, formulas and iconography, an example of a sub-genre film is Skyfall which is an action adventure

in the case of Skyfall & James Bond films can fit into subgenres like action adventure, but there are many other sub-genres such as:

• spy
• espionage
• political thriller
• martial arts films
• race against time

This is a link which should give you a better understanding of sub-genres.
http://en.wikipedia.org/wiki/Genre