BIO_Lecture_Outline_4

BIO_Lecture_Outline_4 - ANT 100Y Lecture #4 Outline...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
ANT 100Y Lecture #4 Outline Heterdontism 4 kinds of teeth in most adult primates Dental Formula (Human) 2.1.2.3 . in modern humans Major Epochs Paleocene, Eocene, Oligocene, Miocene, Pliocene, & Pleistocene Paleocene World Map Paleocene World Climate Plesiadapiformes Size: tiny, shrew-sized to size of small dog. Solitary, nocturnal quadrupeds; well-developed sense of smell. Diet: insects and seeds. Used to be classified as primates. Recent: Plesiadapids NOT Primates 1) No postorbital bar, 2) Claws instead of nails, 3) Eyes placed on side of head, & 4) Enlarged incisors . How Primates Differ from Most Other Mammals Primates have more convergent orbits, petrosal bulla, postorbital bar or closure, & grasping extremities with nails rather than claws. So…. .When did Primates Evolve? Genetic studies: 1st primates evolved ~ 80-90 MYA. No “true” primates (Euprimates) found in Paleocene. But, primates are found in fossil deposits in Eocene. Thus, likely that primates evolved before Paleocene Adaptive Origins of Primates 1). Arboreal Theory 2). Visual Predation Theory 3). Angiosperm Co-Evolution Theory Eocene World Map Eocene Climate
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

BIO_Lecture_Outline_4 - ANT 100Y Lecture #4 Outline...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online