Ch. 16 - Rodentia and Lagomorpha

Question 1

This is the largest mammal order

Answer 1

Order Rodentia

Question 2

About how many species are in Order Rodentia?

Answer 2

2000

Question 3

What percent of all mammals are rodents?

Answer 3

46%

Question 4

What are two places on Earth that lack rodents?

Answer 4

Antarctica and New Zealand

Question 5

What shapes rodent incisors into chisels?

Answer 5

An enamel anterior and more posterior wear

Question 6

Are rodent incisors open-rooted?

Answer 6

Yes

Question 7

Are rodent incisors ever-growing?

Answer 7

Yes

Question 8

Rodents usually have fewer than this many teeth

Answer 8

22

Question 9

Do rodents have canines?

Answer 9

No

Question 10

This rodent family contains squirrels

Answer 10

Sciuridae

Question 11

About how many species are in Family Sciuridae?

Answer 11

300

Question 12

These squirrels are nocturnal and posses a patagium

Answer 12

Flying squirrels

Question 13

What are two species of tree squirrels found in the eastern U.S.?

Answer 13

Grey and red tree squirrels

Question 14

These squirrels are found in the western U.S.

Answer 14

Rock squirrels

Question 15

What are four examples of ground squirrels?

Answer 15

Prairie dogs, marmots, chipmunks, woodchucks

Question 16

This rodent family contains beavers

Answer 16

Castoridae

Question 17

These are the largest North America rodents

Answer 17

Beavers

Question 18

How many beaver species are in North America?

Answer 18

2

Question 19

Are beavers nocturnal or diurnal?

Answer 19

Nocturnal

Question 20

Are beavers polygamous or monogamous?

Answer 20

Monogamous

Question 21

These are beavers’ only natural predator control

Answer 21

Wolves

Question 22

Beavers have these to aid in eating tree cambium

Answer 22

Symbiotic bacteria in caecum

Question 23

This rodent family contains the kangaroo rats and silky pocket mice

Answer 23

Heteromyidae

Question 24

Are Heteromyidae a New World or Old World family?

Answer 24

New World

Question 25

What type of environment do heteromyids prefer?

Answer 25

Arid/semi arid

Question 26

What feeding strategy do heteromyids use?

Answer 26

Granivory

Question 27

What are two ways heteromyids conserve water?

Answer 27

Highly concentrated urine and dietary water

Question 28

This family contains pocket gophers

Answer 28

Geomyidae

Question 29

Are Geomyidae a New World or Old World family?

Answer 29

New World

Question 30

How many species of Geomyidae are there?

Answer 30

35

Question 31

Are geomyids entirely fossorial?

Answer 31

Yes

Question 32

What are three food sources of geomyids?

Answer 32

Roots, plants, prickly pear

Question 33

This feature keeps geomyids from getting dirt in their mouths as they dig

Answer 33

Lips close behind exposed incisors

Question 34

This geomyid feature is naked and highly sensitive

Answer 34

Tail

Question 35

Both heteromyids and geomyids have this feature to store seeds

Answer 35

External, fur-lined cheek pouches

Question 36

This rodent family includes chinchillas, guinea pigs and capybaras

Answer 36

Hystricidae

Question 37

Where are most hystricids found?

Answer 37

South America

Question 38

What is an example of a North American hystricid?

Answer 38

Porcupine

Question 39

What do porcupines eat?

Answer 39

Cambium layer of trees

Question 40

What trees do porcupines prefer to feed on in the western U.S.?

Answer 40

Conifers

Question 41

What trees do porcupines prefer to feed on in the eastern U.S.?

Answer 41

Hardwoods (maple, beech)

Question 42

Do porcupines live in groups?

Answer 42

No

Question 43

Do porcupines have a long gestation?

Answer 43

Yes

Question 44

How many offspring do porcupines have at a time?

Answer 44

1

Question 45

What are three characteristics of precocial porcupine young?

Answer 45

Open eyes, teeth, quills

Question 46

What are two potential porcupine predators?

Answer 46

Fishers, ravens

Question 47

On what three continents are porcupines found?

Answer 47

North America, South America, Europe

Question 48

This family includes New World mice and Old World rats

Answer 48

Family Muridae

Question 49

How many species are in Family Muridae?

Answer 49

>1300

Question 50

What percent of all mammals are in Family Muridae?

Answer 50

28%

Question 51

How many teeth do murids typically have?

Answer 51

<16

Question 52

What are three examples of New World mice?

Answer 52

Voles, lemmings, muskrats

Question 53

What are three examples of Old World murids?

Answer 53

Rats, hamsters, gerbils

Question 54

How many Peromyscus species are in Oklahoma?

Answer 54

8

Question 55

How many woodrat (Neotoma) species are in Oklahoma?

Answer 55

4

Question 56

What are two Old World rats in Oklahoma?

Answer 56

Norway rat and house mouse

Question 57

What are five characteristics of Muridae reproduction?

Answer 57

Early sexual maturity; Large litter sizes; Polygynandrous; Postpartum estrous; Delayed implantation

Question 58

Muridae population sizes experience these

Answer 58

Frequent, sometimes cyclic oscillations

Question 59

What are five potential causes of cyclic Muridae population oscillations?

Answer 59

Sunspots, predation, senescence, immunocompetance, social aggression

Question 60

This order contains rabbits, hares, and pikas

Answer 60

Order Lagomorpha

Question 61

What distinctive teeth do lagomorphs have?

Answer 61

Peg teeth behind their incisors

Question 62

These lagomorphs have altricial young

Answer 62

Rabbits

Question 63

These lagomorphs have precocial young

Answer 63

Hares

Question 64

What is a non-visible difference between rabbits and hares?

Answer 64

Chromosomal differences (2N)

Question 65

How many rabbit species are in Oklahoma?

Answer 65

4