Anth121 � Lecture 3 Notes

Anth121 � Lecture 3 Notes - Anth121 Lecture 3 Notes...

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Anth121 – Lecture 3 Notes - April 8, 2008 The Living Primates o The tree shrew: insectivore or primate? Now placed in their own order: Scandentia In the past, tree shrews have been considered primate They show structural similarities to early primate Large brain for their body size Thumbs that tend to diverge from its fingers These features are probably either Independently evolved adaptations to similar environments or A retention of primitive mammalian characteristics o Infraorder: Lemuriformes (lemurs) Primitive traits Well developed olfactory apparatus o Wet-noise o Split upper lip Binocular vision Nails on most of their digits Lemur dental specializations Three premolars One premolar less than the primitive mammalian condition Many species have incisors specialized into a tooth comb These are used for grooming and also to scrape nutritious, protein-rich sap off of the bark of trees Lemuridae (true lemurs)
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Anth121 � Lecture 3 Notes - Anth121 Lecture 3 Notes...

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