Bio - 108 Lecture 25 Flashcards Preview

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Flashcards in Bio - 108 Lecture 25 Deck (18):
1

Synapsids

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

2

Therapsids
there = mammal

- Characterized by the enlargement of the dentary bone in the jaw
- Shoe development of secondary plate

3

Mammalian Characteristics

- 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

4

Order Monotermata + Species

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

5

Order Marsupialia

- Crawl into mothers pouch
- Have cloaca

6

Eutheria

Non marsupial therians
- Develop via placenta until very well developed
- Separate urinary and anal openings

7

Afrotheria

Underwent diversification in Africa

8

Xenarthra
Xenos

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

9

Laurasiatheria

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

10

Order Chiroptera

Bats

11

Order Cetartiodactyla

dolphins, whales

12

Euarchontoglires

means true ancestors

13

Order Lagomorpha

Rabbits, hares, pikas

14

Order Rodentia

- Largest order of mammals
- constantly growing front teeth

15

Order Primates

- thumb and toe widely separated
- flat nails
- forward facing eyes
- pentadactyl

16

Family Hominidae

- Humans
- lack tails

17

Human Characteristics

- bipedalism
- flexable thumb
- large brain
- First evident in africa
- Homo erectus first species of homo to leave africa

18

Homo neanderthalis live in europe

homo sapians