Dermal bone of pectoral girdle that is median and ventral in position. [ http://purl.obolibrary.org/obo/go/references/0000034 VSAO:0000161 http://dx.plos.org/10.1371/journal.pone.0051070 ]
Synonyms: interclavicle bone
See discussion on pectoral girdles - change relationship to overlaps? Kardong: enlarged oval scale
Present in therapids and monotremes, reduced in size in marsupials and placentals. In birds, the interclavicle is fused with the clavicles to form the furcula (wishbone); the furcula forms a 'Y' shape and the interclavicle is the stem of the 'Y'.