Juvenile and young adult ossicones of Giraffa camelopardalis.

(A) Lateral view of Giraffa camelopardalis young adult female ossicone (AMNH 165051), with secondary bone growth concentrated at the apex and as irregularly bordered islands on the shaft. The ossicone is fused to the skull surface with a visible fusion line. (B) Lateral view of Giraffa camelopardalis juvenile ossicone (AMNH 83605) that is not yet fused to the skull. (C) Undersurface of Giraffa camelopardalis juvenile ossicone, showing the characteristic pitted surface of detached ossicones.