Your therapod's pelvis is not [INTERNAL], and the pelvis is smaller than the hip that connects to it?
Also, if you don't want a [THROAT] that is not between a head and a torso (ie, attached to the forehead, or something), you need to define it that way. (However, you need to extend the spine through the newly-defined neck or else all of your creatures will be paralysed.)
I am uncertain about the spinal structure of a therapod. However, in a humanoid, the spinal structure should look something like this.
[BP:UB:upper body][UPPERBODY]
[BP:LB:lower body][LOWERBODY]
[BP:NECK:neck][CON:UB][THROAT]
[BP:SPINE1:cervical spine][CON:NECK][NERVOUS][INTERNAL][SMALL][SKELETON]
[BP:SPINE2:thoracic spine][CON:UB][NERVOUS][INTERNAL][SMALL][SKELETON]
[BP:SPINE3:lumbar spine][CON:LB][NERVOUS][INTERNAL][SMALL][SKELETON]
[BP:SPINE4:pelvic spine][CON:LB][NERVOUS][INTERNAL][SMALL][SKELETON]
Of course that's assuming that we go with the convention of defining the torso first - is there any particular requirement to define the torso first and not start from the head?
Also, what I'd like to see is being able to have multiple attach points to further define how something is connected. If the cervical spine is in the neck, I should be able to specify that it connects to the brain as well as the thoracic spine, and that the thoracic spine is in the upper body and connects to the cervical and lumbar spines.
... I'm a bit nitpicky.