part of part of has potential to develop into has potential to develop into clavicle bone pre-cartilage condensation pectoral girdle skeleton clavicle pre-cartilage condensation In most birds and mammals the clavicles are the only dermal elements in the trunk, and is the only membrane bone associated with the pectoral girdle in these taxa. However, there can be secondary cartilage, or subsequent endochondral ossification, or fusion with endochondral elements. In rodents, the lateral ends of the clavicle are endochondral but the main portion is dermal. EMAPA:18026 UBERON:0010844 A pre-cartilage condensation that has the potential to develop into a clavicle.