Bio - 108 Lecture 25 Flashcards

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1
Q

Synapsids

A
  • One hole in skull
  • Includes reptiles like tailbacks and dimetrodon, and many therapsida
  • early synapsids had a sprawling, reptile-like gait
  • Predatory
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2
Q

Therapsids

there = mammal

A
  • Characterized by the enlargement of the dentary bone in the jaw
  • Shoe development of secondary plate
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3
Q

Mammalian Characteristics

A
  • Left over jaw bones to the middle ear
  • Differentiated dentition
  • Teeth occlude more closely
  • Two sets of teeth over life span
  • Verticle limb placement
  • Endothermic and homeothermic
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4
Q

Order Monotermata + Species

A
1 Platypus, 4 Echidnas
- Lay eggs
- have cloacas
trema = hole
- Theria
- Nourseshed via placenta
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5
Q

Order Marsupialia

A
  • Crawl into mothers pouch

- Have cloaca

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6
Q

Eutheria

A

Non marsupial therians

  • Develop via placenta until very well developed
  • Separate urinary and anal openings
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7
Q

Afrotheria

A

Underwent diversification in Africa

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8
Q

Xenarthra

Xenos

A

Anteaters, sloths, etc
- Completely lack teeth
- Extra articulations in their vertebrae
Strange

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9
Q

Laurasiatheria

A
  • Laurasia was a palecontintent
  • Includes order carnivora and Chiroptera
  • only mammals that can fly
  • use sonar to see
  • also includes hoofed animals
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10
Q

Order Chiroptera

A

Bats

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11
Q

Order Cetartiodactyla

A

dolphins, whales

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12
Q

Euarchontoglires

A

means true ancestors

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13
Q

Order Lagomorpha

A

Rabbits, hares, pikas

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14
Q

Order Rodentia

A
  • Largest order of mammals

- constantly growing front teeth

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15
Q

Order Primates

A
  • thumb and toe widely separated
  • flat nails
  • forward facing eyes
  • pentadactyl
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16
Q

Family Hominidae

A
  • Humans

- lack tails

17
Q

Human Characteristics

A
  • bipedalism
  • flexable thumb
  • large brain
  • First evident in africa
  • Homo erectus first species of homo to leave africa
18
Q

Homo neanderthalis live in europe

A

homo sapians