part of part of in taxon Theria <mammals> Ornithorhynchus pectoral girdle bone pectoral girdle skeleton dermal bone interclavicle UBERON:0011655 Wikipedia:Interclavicle VSAO:0000161 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'. interclavicle bone Dermal bone of pectoral girdle that is median and ventral in position. See discussion on pectoral girdles - change relationship to overlaps? Kardong: enlarged oval scale