The posterolateral margins of the frontoparietals lie medial to the epiotic eminences.
The posterolateral intermuscular line is a slight ridge extending distally from the obturator ridge.
The anterolateral and posterolateral processes of the prevomers form the incomplete bony internal margin of the choanae.
The pterygoids do not appear until metamorphosis, when ossification is evident in only the mid-parts of the posterolateral arms.
The insertion is tendinous on the posterior surface of the hypotarsus and along the posterolateral ridge of the tarsometatarsus.
