Figure 4.

Morphological disparity in CP seen in elephant, tarsier, platypus and dog skull models. Yellow top centre: CP of the African elephant (L. africana), viewed here from brain case, has the largest absolute and relative surface area and approximately 1000 foramina for passage of olfactory nerves to the brain. Extreme reduction in complexity is evident in CPs of the tarsier (T. syrichta) (green, lower left) and platypus (Ornithorhynchus anatinus) (orange, bottom centre) CPs. Dog (C. familiaris) CP (blue, lower right). The inset superimposed over elephant model shows tarsier, platypus and dog CPs to scale with the elephant's CP.