Rodentia

Question 1

Rodent skull characteristics

Answer 1

single pair of upper and lower incisors, diastema, bank of cheekteeth, mandibular fossa is trough or channel, lack sagittal crest, small coronoid process, large masseter

Question 2

rodents and lagomorphs grouped in a clade called

Answer 2

glires

Question 3

Jaw type where lower incisor runs directly underneath all the cheekteeth and incisor root is in line with incisor tip and length of dentary

Answer 3

sciurognathous

Question 4

Jaw where lower incisor bows away from row of cheek teeth, so incisor root is outside of tooth row. Incisor root is not in line with angular process

Answer 4

hystricognathous

Question 5

IOF is small and located on rostrum at base of zygomatic plate. Have a tubercule below IOF

Answer 5

sciuromorphous

Question 6

IOF is large, slit-shaped hole in the zygomatic plate itself (v or y shape)

Answer 6

myomorphous

Question 7

Extremely large IOF that is bigger than foramen magnum and composes entirety of zygomatic plate

Answer 7

hystricomorphous

Question 8

Which family belongs to squirrels, chipmunks and prairie dogs?

Answer 8

Sciuridae

Question 9

Which family do jumping mice, birch mice and jerboas belong to?

Answer 9

Dipodidae

Question 10

Which suborder do beavers, gophers, kangaroo rats and pocket mice belong to?

Answer 10

Castorimorpha

Question 11

Features of Castorimorpha skull

Answer 11

Small IOF on side of rostrum, IOF may go all the way through

Question 12

Family of sewells/mountain beavers

Answer 12

Aplodontiidae

Question 13

Aplodontia rufa skull features

Answer 13

low, wide skull with flaring zygomatic arches, long bony canal leading to AB, vase-shaped AB, unique crown pattern on cheekteeth

Question 14

Aplodontia rufa body features

Answer 14

fusiform body, small eyes, ears and tail, large claws on forefeet, small white patch under ear, large vibrissae, herbivorous

Question 15

Sciuridae skull features

Answer 15

round, egg-shape skull, large orbits, prominent post-orbital process, bump on rostrum near IOF, 4-5 cheekteeth, palate ends at same level as toothrow, jugal contacts frontal

Question 16

Sciuridae body features

Answer 16

small, long furry tail, large eyes, small yet prominent ears, forefeet have 4 digits and hindfeet have 5, sharp claws

Question 17

3 families in Castorimorpha

Answer 17

Geomyidae, Heteromyidae, Castoridae

Question 18

3 families in Myomorpha

Answer 18

Zapodidae, Cricetidae, Muridae

Question 19

2 families in Sciuromorpha

Answer 19

Aplodontiidae, Sciuridae

Question 20

2 families in Hystricomorpha

Answer 20

Erithizontidae, Myocastoridae

Question 21

Scientific name of flying squirrel

Answer 21

Glaucomys sabrinus

Question 22

Tree squirrels have ___ constriction between orbits and orbits point _____

Answer 22

wide, outward

Question 23

Ground squirrels have ___ constriction between orbits and orbits point _____

Answer 23

narrow, upward

Question 24

A ground squirrel with stripes on face and body

Answer 24

Tamias

Question 25

A ground squirrel with no stripes on face but a pair of dark and light stripes on body

Answer 25

callospermophilus

Question 26

A dappled brown and white ground squirrel

Answer 26

otospermophilus beecheyi

Question 27

A sand-colored ground squirrel with white lateral stripes on body

Answer 27

Ammospermophilus nelsoni

Question 28

A sand-colored ground squirrel with no stripes

Answer 28

Xerospermophilus mohavensis

Question 29

Family that includes New World rats & mice; voles, lemmings, hamsters

Answer 29

cricetidae

Question 30

Family that includes Old World rats and mice, gerbils

Answer 30

muridae

Question 31

features of subfamily arvicolinae

Answer 31

small ears relatively hidden by fur, short legs, tail shorter than body, uniform coloration, fusiform body, large and stout skull, broad incisors, prismatic cheek teeth, prominent occipital crest

Question 32

Scientific name of California vole

Answer 32

microtus californicus

Question 33

Scientific name of muskrat

Answer 33

ondatra zibethicus

Question 34

Subfamily of woodrats, deer mice and harvest mice

Answer 34

neotominae

Question 35

Woodrat with light feet, bicolored tail, large ears

Answer 35

neotoma lepida

Question 36

Woodrat with dusky feet, large ears

Answer 36

N. fuscipes/N. macrotis

Question 37

A tiny mouse with grooved incisors

Answer 37

Reithrodontymys megalotis

Question 38

Neotoma skull characteristics

Answer 38

high crowned lophodont cheek teeth, no temporal ridge

Question 39

name for jumping mouse

Answer 39

zapus

Question 40

zapodidae skull characteristics

Answer 40

enlarged IOF, sciuromorphic lower jaw, separate accessory foramen, thin and perforated angular process, 18 teeth, grooved upper incisors

Question 41

Scientific name of North American porcupine

Answer 41

Erethizon dorsatum

Question 42

Scientific name for nutria

Answer 42

Myocastor coypus

Question 43

Nutria and porcupines are in which suborder?

Answer 43

hystricomorpha

Question 44

Scientific name of American beaver

Answer 44

castor canadensis

Question 45

scientific name for pocket gopher

Answer 45

thomomys bottae

Question 46

features of thomomys bottae

Answer 46

massive procumbent incisors, small IOF on side of rostrum, simple columnar molars, palatine pits between teeth rows, sharp angle from base of teeth to incisors, large front claws, fusiform body

Question 47

Spiny pocket mice with rectangular parietal bone

Answer 47

Chaetodipus

Question 48

Silky pocket mice

Answer 48

Perognathus

Question 49

Kangaroo rats

Answer 49

dipodomys

Question 50

kangaroo mice

Answer 50

microdipodops