1 / 2 HD Skeletons

[Matuku]

I've been reading up on the rules for skeletons and notice that the table for CR goes all the way down to 1/2 HD, but I can't find anything that has this!

Does 1/2 HD mean something else than literally a 0.5 multiplier? Where in the books does it explain this?

[Necromancer]

I've never seen 0.5 HD implemented; the lowest HD I've seen was a single HD with a negative modifier. One can assume it's included in case it's ever used.

[Starglim]

A 1HD skeleton has 1 x d8 hit die. I'd say a 1/2 HD skeleton has 1 x d4 hit die.

[Jeraa]

In 3.5 D&D, some creatures had fractions of a hit die. Lizards had 1/2d8 hit dice, and bats had 1/4th of a d8 for a hit die. But it seems fractional hit dice were removed from pathfinder, so that line in the table is pointless now, as no monster uses fractional hit dice anymore.

[Lurk3r]

Maybe it's so you can apply classes to them and still end up with a 1HD skelly?

[Tom Baumbach]

It is indeed a leftover bit of rules that is now obsolete. That line is only used if you create a skeleton from a old 3.5 monster.