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ANTC99H3 (3)
Lecture 11

lecture 11 subfossil lemurs and patterns.docx

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University of Toronto Scarborough
Mary Silcox

Lecture 11 – Patterns and Subfossil Lemurs Changes in primates throughout time During the Oligocene there are low levels of diversification (extinction of primates) During the late Oligocene there were the first new world monkeys During the Miocene the area became heavily forested and there was an increase in primate species During the late Miocene the land became dry but the cercopithecoids did well due to their terrestrial locomotion and bilophodont teeth Grande coupure Late Eocene to the early Oligocene most primates ate bugs and fruits The modern day diet of cercopithecoids consists of leaves (they are low energy and have less cost) CFleagle fig. 18.10 p. 405d eat fruits Dietary change in catarrhines cercopithecine colobines Macaques can live in many different kinds of environments Lecture 11 – Patterns and Subfossil Lemurs Catarrhines went from being arboreal to semi-terrestrial and arboreal There is also a change in arboreal catarrhines. In the early Oligocene most were quadrupedal arborealists but some have developed suspensory behaviours (larger primates) During the Eocene and the Olgocene the primates were smaller During the Miocene there were larger primates Locomotor change in arboreal catarrhines Locomotor change in catarrhines Strepsirrhines are thought to be a small group of primate species however only recently have large strepsirrhines gone extinct in the island of Madagascar. Subfossil lemurs (many found in the caves) Species Info Archeolemurines Very similar to OWM (monkey lemur) Have bilophodont molar Tooth seem like canines but are actually premolars (no canines) They don’t have toothcomb They have shorter limbs than terrestrial quadrupeds which indicate that they are terrestrial but not as terrestrial Megaladapines Larger (70kg) (koala lemurs) They are about the size of a gorilla but have smaller brain size They have no upper incisors Skull resembles that of a tapir It
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