Interparietal bone of ox is a single bone located in the postero-superior part of the cranium.
It is paired in the fetus; wedged in between the parietals above and the supra-occipital below and is fused with these bones before or shortly after birth.
The frontal sinus is prolonged into it in the adult.
Horse
It is located on dorsal aspect of the cranium.
The external face is quadrilateral, smooth and presents the sagittal parietal crest.
The internal aspect presents a three sided process-the internal occipital protuberance or the ossific tentorium.
Dog
Its location is similar to that of the horse.
It fuses with the occipital before birth.
It bears the high posterior part of the parietal crest.
