The term subgenual areas is ambiguous, the meaning depending on whether it is used in reference to, 1) areas of the subcallosal gyrus located ventral to the genu of corpus callosum or, 2) to areas of anterior cingulate cortex located in the subcallosal gyrus that have internal structure and receptor characteristics similar to area s32 and s24ab of the human. Used in reference exclusively to the subcallosal gyrus, they are composed largely of area 25 together with area s32 and s24ab of the human. They are the same in the macaque except that the macaque lacks the caudal extension of area 24a into the subcallosal gyrus ( Vogt-2012 ). The rat and the mouse have an architectonically defined area 25 and area s30, but they do not have a subcallosal gyrus ( Vogt-2013 ). Used in reference to the anterior cingulate cortex the same descriptions apply, except that area 25 is excluded ( Vogt-2013 ).