Chapter 6 (Primate Biology) Flashcards
Biology In The Present
Prosimians
Lemurs
Lorises
Tarsiers
New World Monkeys
Cebids
Marmosets
Old World Monkeys
Baboons
Colobuses
Guenons
Apes
Gibbons Orangutans Chimpanzees Bonobos Gorillas
Differences between Primates and other mammals
Arboreal adaptations
Dietary Flexibility
Parental Investment
Primate Physical Attributes
Versatile skeletal structure- highly mobile joints Enhanced vision (color, depth) Enhanced sense of touch (dermal ridges)
Primate Parental Investment Attributes
Relatively few offspring at a time
Relatively long periods between births
Period of pre-adult care is long and intensive
All associates with size and complexity of primate brains.
Primate General Information
High level of adaptability Variety of anatomical and behavioral variation Most are diurnal, few are nocturnal Omnivorous diets (most species) Diverse social groupings
Power Grip
A fistlike grip in which the fingers and thumbs wrap around an object in opposite directions
Precision Grip
A precise grip in which the tips of the fingers and thumbs come together, enabling fine manipulation
Preadaptation
An organism’s use of an anatomical feature in a way unrelated to the feature’s original function
Rhinarium
The naked surface around the nostril’s, typically wet in mammals.
Y-5
Hominoids’ pattern of lower molar cusps
Tooth Comb
Anterior teeth that have been tilted forward, creating a scraper
Canine-premolar honing complex
Dental form in which the upper canines are sharpened against the lower third premolars when the jaws are opened and closed
Diastema
A space between two teeth
What gives primates their dietary flexibility?
Multiple tooth types
Reduced number of teeth
Olfactory Hub
areas of the brain associated with smell and hearing
Grade
Group of organisms sharing the same complexity and level of evolution
Clade
Group of organisms that evolved from common anestors
Primitive Characteristics
Characteristics present in multiple species of a group
Derived Characteristics
Characteristics present in only one or a few species of a group
Hominin
Humans and humanlike anscestors
Monkey or Ape?
Body Size
Monkey- generally smaller
Ape- generally bigger
Monkey or Ape?
Posture/Locomotion
Monkey- generally horizontal body trunk
Ape- relatively vertical body trunk
Monkey or Ape?
Body trunk
Monkey- Narrow
Ape- Broad
Monkey or Ape?
Tail
Monkey- tail
Ape- no tail
Monkey or Ape?
Lower Molars
Monkey- Bilophodont lower molar
Ape- Y-5 molar pattern
Monkey or Ape?
Brain
Monkey- Relatively small
Ape- Relatively large
Monkey or Ape?
Growth
Monkey- Relatively fast
Ape- Relatively slow
Monkey or Ape?
Interspecies Variability
Monkey- High
Ape- Low
Prehensile Tail
A tail that acts as a kind of a hand for support in trees, common in New World monkeys.
Suspensory Apes
Anatomical differences include longer arms, longer fingers and toes, fingers are curved.
Knuckle-Walking
Unique style of quadrupedal locomotion used by chimpanzees and gorillas.
Strepsirhines
Lemurs, other prosimians etc (wet nose)
Haplorhines
New World/Old World Monkeys and Apes (dry nose)
Strepsirhines or Haplorhines?
Smell
Strepsirhine- More developed
Haplorhine- Less developed
Strepsirhines or Haplorhines?
Vision
Strepsirhine- Nocturnal for many
Haplorhine- Diurnal
Strepsirhines or Haplorhines?
Touch
Strepsirhine- Claws in some, less developed
Haplorhine- Nails, more developed
Strepsirhines or Haplorhines?
Diet
Strepsirhine- More specialized, more teeth in some
Haplorhine- More generalized, reduced number of teeth
Strepsirhines or Haplorhines?
Intelligence
Strepsirhine- Less developed, small brain
Haplorhine- More developed, larger brain
Platyrrhine
New World Monkeys
Catarrhine
Old World Monkeys and Apes
Primate Defining Characteristics (get at least 10)
Tendency to erect posture Flexible generalized limb structure Hands and feet have grasping capability Opposable thumb Nails instead of claws Tactile pads for sense of touch Lack of dietary specialization Generalized dentition Enhanced vision, reduced smell Five digits/hand and foot Color vision Stereoscopic vision Eyes in front of face Increased brain size Long period of infant dependency Long period of gestation Reduced number of offspring Live in social groups Greater dependence on learned behavior