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Evolutionary Trends - Coggle Diagram
Evolutionary Trends
Characteristics
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- Trend toward erect posture
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ischial callosities, free hands
vertical cling & leap, even for prosimians
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color vision
trichromatic color vision (most monkeys, apes): fruit and leaf foraging advantage, know compositions
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capuchin: some females 3 colors, some 2 colors
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bony orbit = sockets around eyes, eyes side -> front
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OW monkey & ape: 32 (2-1-2-3, no including wisdom teeth)
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Exception
small NW monkey: marmoset/tamarin: 2-1-3-2, drop one molar
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vomeronasal system: prosimian & NW monkey yes, we no
scent-making: prosimian & NW monkey yes, apes no
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first stand up, then brain bigger
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hemisphere size, visual cortex, association cortex, limbic areas INCREASE proportionally
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prefrontal cortex
high-level thinking, macaque * 10
- Replacement of claws with nails
tactile pad 触觉垫, dermatoglyphics 皮纹学,
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- Free mobility of fingers and toes
opposable thumb to hold branches, mom
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1kg+ prosimian to diurnal
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- Prolongation of life span: pregancy, infant, puberty
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Exception: marmoset, tamarin
Eras
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Paleozoic (4000 = life in ocean - 325): primordial -> invertebrates -> vertebrates -> bony fish -> reptiles
start: bacteria, single-cell
oxygen-generated cynanobacteria -> less toxic, right amount of iron -> possible forl lives
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Cenozoic: 65
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Tertiary
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Paleocene (65): Prosimian, lemurs, lorises, tarsiers
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Oliogocene (38): monkeys, Apes
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