Why isn't 10.0.0.55 0.255.255.0 a valid acl mask to match all hosts that start with 10 and end with 55?

I have this really big object group that is just all hosts ending with .55 from a 10.0.0.0/8 subnet and I was wondering if I could shorten it to this simple acl: 10.0.0.55 0.255.255.0

But all I can find in the documentation is that you should not have zeros separated by non zeros. I can understand why that is the case with prefix list wildcard masks, but it should be no problem for ACLs.

What am I missing?