[PF] Aligned Nautral Weapons?

[Frosty]

Is there anywhere in the PF rulebooks that states that when a creature has DR/magic or DR/epic then it's natural attacks are also considered of that type, and that a creature's natural weapons and weilded weapons are treated as the same alignment(s) as its alignment subtype(s)? So like, I think Pit Fiends are supposed to have their claw attacks treated as Lawful and Evil, but I don't see that in its entry in the Bestiary.

[tyckspoon]

Universal Monster Rules (http://paizo.com/pathfinderRPG/prd/monsters/universalMonsterRules.html), Damage Reduction. Same place it is in the 3.5 rules, although I'm not sure where they put it in the physical books; Bestiary, probably.