3D skull models showing marked reduction in CP morphology in taxa heavily reliant on non-olfactory sensory modalities.

Deborah Bird, William Murphy, Lester Fox-Rosales, Iman Hamid, Robert Eagle & Blaire Van Valkenburgh
(a), CP loss viewed in nasal morphology of bottlenose dolphin (Tursiops truncatus), which uses echolocation. Pink: Single pair of foramina connecting ethmoid area of the nasal passage to the cranium. Inset, magnification of foramina. (b-c), Impact of orbit size on CP size constraints, contrasting the tarsier (Tarsius syrichta) and armadillo (Dasypus novemcinctus). (b), Tarsier, a visually-specialized nocturnal primate with enlarged, forward facing orbits, has reduced olfactory anatomy. Red: CP squeezed between convergent orbits. (c), By...
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