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Primates

Adaptations - Form Begets Function

QuestionAnswer
What proportion of primates are nocturnal? Diurnal? 23% / 77%
Which primate species are nocturnal? 100% Lorises, Gallegos, Tarsiers 50% Lemurs 1% Platyrrhine
Do most primates include fruit in their diets? YES! Most primates eat fruit. Primates cannot synthesize Vitamin C
High pointed cusps on premolars and molars. Less than 500 g (1.1 lbs) Insectivory. Teeth that puncture. Small size because insects are small.
High crested cusps on pre/molars. Over 1 kg (2.2 lbs) Fol Folivory. Teeth that cut. Large because they need guts in order to digest cellulose.
Broad, spatulate incisors & low rounded cusps on pr/molars. All weights Frugivory. Teeth that cut and pulp.
Broad, spatulate incisors & anything goes on pre/molars Omnivory.
What type of limb proportions does a quadrupedal have? Even arm and leg lengths.
What type of limb proportions does a leaper have? Legs longer than arms with extra-long feet. The legs are used most.
What type of limb proportions does suspensory locomotion have? Arms longer than legs, mixed derived traits from suspensory heritage. Arms are used most.
Are knuckle-walking and suspensory locomotion the same thing? No, k-w is a subset of suspensory. Only Gorillas and Chimps belong to this category.
Limb proportions for bipedal locomotion? Subset of suspensory. Legs longer than arms with extra-shprt feet.
Bipedal Traits: Only Human Short bowl-shaped pelvis, platform plateau tibia, medial angle femur, sigmoid-shaped spinal column, legs longer than arms, short robust hallux that can't grasp, short foot.
Created by: cassidylm34
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