is a bone which, in most tetrapods
, is located between the clavicles
. Therian mammals
) are the only tetrapods which never have an interclavicle, although some members of other groups also lack one. In birds
, the interclavicle is fused with the clavicles to form the furcula
(wishbone). In chickens
the furcula forms a "Y" shape and the interclavicle is the stem of the "Y".