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.

A pre-cartilage condensation that has the potential to develop into a clavicle.

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UBERON:0010844