There are actually 3 versions of those 'anatomy guide' thing.
The first one that Angel post was intended to be a redline for someone, which is pretty old now.
The
second one is posted in "
A Guide to making a Successful Form" thread on JBDFC with improvements from the first redline. It is okay, but there are still some flaws here and there.
The
third one is the latest one that I've just made to show a user on how I view JBDs, which is probably the most accurate one out of the three, but again, its still not perfect.
All of these, however, are not an 'official' anatomy reference, but more of my own views about JBDs after I've been drawing them for quite some time. I suggest use it more as a guideline for improvement rather than a reference; being a made up species their anatomy can vary from how each person view them.
@Mods - if I should not be posting here, I could remove my post.