Skeletal subdivision that undergoes direct development and includes elements that either develop in association with the basement membrane of the ectoderm or are homologous with such elements; includes dermatocranium, components of the appendicular skeleton, teeth and tooth-like elements of the oropharynx, and integumentary elements. [ VSAO:0000035 http://purl.obolibrary.org/obo/go/references/0000034 http://dx.plos.org/10.1371/journal.pone.0051070 PSPUB:0000170 ]