Unknown. Please provide the note for me to make flashcards from.
What is the midden-gliding hypothesis and why is it important
Length of isolated finger bones discovered suggested that plesiadapiforms may have glided and therefore, more like flying lemurs than primates. However, it was later discovered that these bones actually consisted of foot/finger bones, and therefore, was disproven.
Which were the first adaptive radiation of primates
Plesiadapiforms
What skeletal characteristics are associated with leaping:
Grasping extremities and long legs
Describe the improvements to the visual system for euprimates:
Bigger eyes that are closer together, reduced smell
Identify carpolestidae:
Early plesiadapiforms that were found in North America from middle paleocene to early eocene
What does purgatorious demonstrate about primates from the earliest records? What modern primates serves as a good record for them:
That they were arboreal, tree shrews
What features common to all living primates do plesiadapiforms lack:
Nails instead of claws on digits (only for MOST species, not ALL)
What are the distinguishing facial features of adapoidea: Postorbital bar and long snout
What are the distinguishing post cranial features of adpoidea: Long legs, short arms, robust extremeties
What does the omamyoid hypothesis propose about anthropoid origins? Is this the one we perceive to be correct?
Omamyoid are stem happlorines and adapoids are stem streppsorhines. This hypothesis is likely correct.
What does the adapted hypothesis propose about anthropoid origins?
Both omamyoids and adapoids are happlorhines
What primates make good models for adapoids? How about European adaptations?
Sifaka and slow loris
What primates make a good model for omamyoids?
Mouse lemurs and tarsiers
What are the distinguishing features between adapoids and omamyoid
Adapoids have larger canines and spatulate incisors and omamyoids have larger orbits, shorter snouts, and more elongated ankle bones
Identify omamyoids
Small primates, lived from early eocene to oligocene
Identify amamyoids
Medium primates, all over world
What kind of primates are Euprimates? What does this mean?
Crown primates, have all the defining features of modern primates
What environmental shift accompanied the evolution primates?
Climate became very warm
What is Darwinius and why is it important?
lacks grooming claw and tooth comb, likely stem streppshrines, disproves adapted hypothesis
What kind of primates are plesiadapiforms? What does that mean?
Stem primates, lack all modern features
What are the defining anatomical traits of carpolestidae?
mitten shaped premolars, increasing complexity of molars to tackle fruits/nuits, diverging big toe.
What are the big four euprimate characteristics?
improvements to the visual system
fruit molar eating
grasping extremeities
leaping characteristics of skeleton
What is Purgatorious? Why are they important? 5Ws:
Earliest adaptive radiation of plesidapiforms, first to appear in fossil record
What were the first euprimates and when did they appear?
adapoidea/omamyoida, 56 mya
What are the defining anatomical traits of carpolestidae?
mitten shaped premolars to eat fruits and nuts
diverging big toe w/ a nail. associated with grabbing onto smaller supports
What is Purgatorious? Why is important? Where/what of last specimen?
most primitive group of plesiadapiforms, first primate to appear in the fossil record, single specimen from last Crectaceous
Plesiadapiforms are __________ from the _________ that gave rise to all living primates
primitive offshoots, stem
T/F: stem primates gave rise to plesiadapiforms and euprimates
true