Bio - 108 Lecture 25 Flashcards
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
2
Q
Therapsids
there = mammal
A
- Characterized by the enlargement of the dentary bone in the jaw
- Shoe development of secondary plate
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
4
Q
Order Monotermata + Species
A
1 Platypus, 4 Echidnas - Lay eggs - have cloacas trema = hole - Theria - Nourseshed via placenta
5
Q
Order Marsupialia
A
- Crawl into mothers pouch
- Have cloaca
6
Q
Eutheria
A
Non marsupial therians
- Develop via placenta until very well developed
- Separate urinary and anal openings
7
Q
Afrotheria
A
Underwent diversification in Africa
8
Q
Xenarthra
Xenos
A
Anteaters, sloths, etc
- Completely lack teeth
- Extra articulations in their vertebrae
Strange
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
10
Q
Order Chiroptera
A
Bats
11
Q
Order Cetartiodactyla
A
dolphins, whales
12
Q
Euarchontoglires
A
means true ancestors
13
Q
Order Lagomorpha
A
Rabbits, hares, pikas
14
Q
Order Rodentia
A
- Largest order of mammals
- constantly growing front teeth
15
Q
Order Primates
A
- thumb and toe widely separated
- flat nails
- forward facing eyes
- pentadactyl
