First of all, this is wonderful, very helpful.
However, this is focused on applying human anatomy to mammalian, or even reptilian anthros, which is understandable because those are most commmon. I was wondering what sorts of considerations must be taken when applying it to invertebrete anthros. After all, the basis for their anatomy is completely different...
There's just enough insectoids around that one can learn those by looking around, but some people like myself are infatuated with drawing the weird. What sort of alteratations are required for anthropomorphizing, say, a starfish or a tardigrade?
I could do stuff with that. It would be a whole other sort of application, but I think human anatomy could be easily adapted for a bug of some sort.
I don't want to single out an otherwise okay piece for criticism but:
This is a good example of how center of gravity doesn't work. If you note the angle between hips and toes, and factor in the mild weight of her long tail, I really don't know this character is supposed to actually maintain balance. Not like that she doesn't....
That's also an example of terrible proportions. Either she has no ribcage, or she has no spine. Her torso should be much longer, which would help her keep her balance much better.