Order Rodentia

Question 1

So Sciuromorpha, f aplodontidae

Answer 1

mountain beaver, protrogomorphous, sciurognathous, flat triangle skull, flask shaped bullae, nearctic, herbivorous

Question 2

So Sciuromorpha, f sciuridae

Answer 2

sciuromorphous, sciurognathous, post orbital process present, (na, nt, p, o, e)

Question 3

Tamias striatus

Answer 3

eastern chipmunk, black and white stripes on back

Question 4

Sciurus carolinensis

Answer 4

eastern gray squirrel

Question 5

Tamiasciuris hudsonicus

Answer 5

red squirrel

Question 6

Glaucomys sabrinus

Answer 6

northern flying squirrel, reddish yellowish cast to fur, gray under

Question 7

Glaucomys volans

Answer 7

southern flying squirrel, gray, white under

Question 8

Marmota monax

Answer 8

woodchuck

Question 9

So Castorimorpha, f castoridae

Answer 9

beavers, sciuromorphous, sciurognathous, flat back skull, bony ear tube, spatulate tail, (na, p)

Question 10

Castor canadensis

Answer 10

american beaver, largest skin, flat tail

Question 11

So Castorimorpha, f geomyidae

Answer 11

gopher, sciuromorphous, sciurognathous, two holes in palate between last molars, premolar figure 8 shaped (na, nt), fossorial

Question 12

So castorimorpha, f heteromyidae

Answer 12

kangaroo rat, sciuromorphous, sciurognathous, infraorbital foramen pierces rostrum, inflated bullae (na, nt), bipedal

Question 13

So myomorpha, f dipodidae

Answer 13

histricomorphous, sciurognathous, inflated bullae, tail longer than head and body (na, p, o)

Question 14

Zapus hudsonius

Answer 14

jumping mouse, no white tip on tail, olive pelage

Question 15

Napaeozapus insignis

Answer 15

jumping mouse, white tip on tail, red pelage

Question 16

So myomorpha, f muridae

Answer 16

myomorphous, sciurognathous, v shaped infraorbital foramen, bunodont molars, (p, o, e)

Question 17

Mus musculus

Answer 17

belly fur gray, tail as long as head and body

Question 18

Rattus norvegicus

Answer 18

light brown, scaly tail

Question 19

So myomorpha, f cricetidae

Answer 19

myomorphous, sciurignathous, v shaped infraorbital foramen, lophodont, molars with series of angular cusps, triangle, (na, nt)

Question 20

Peromyscus spp.

Answer 20

belly fur white, tail as long as head and body

Question 21

Myodes gapperi

Answer 21

red fur, tail about twice as long as feet

Question 22

Microtus pennsylvanicus

Answer 22

dark brown to black fur, tail about twice as long as feet

Question 23

Microtus pinetorum

Answer 23

orange fur, tail reaches toes or just past

Question 24

Synaptomys cooperi

Answer 24

gray black, tail shorter than hind feet

Question 25

Ondatra zibethicus

Answer 25

dark, fat, hair tail

Question 26

So Anomaluromorpha, f pedetidae

Answer 26

histricomorphous, sciurognathous, large infraorbital foramen, large dent on rostrum (e) , bipedal

Question 27

So hystricomorpha, f bathyergidae

Answer 27

protagomorphous but technically histricomorphus, hystricognathous, robust skull with strong lower incisors, flattened bullae, (e)

Question 28

So hystricomorpha, f hystricidae

Answer 28

both histri, skull elongate, round, flat cheek teeth, big, (e, O)

Question 29

So histricomorpha, f erethizontidae

Answer 29

both histri, lophodont, short paroccipital process, enlarged bullae (na, nt) herbivorous

Question 30

Erethizon dorsatum

Answer 30

porcupine

Question 31

So histricomorpha, f echimyidae

Answer 31

both histri, paroccipital process curve under bullae, small (nt)

Question 32

So histricomorpha, f octodontidae

Answer 32

both histri, firgure 8 shaped molars, upper molars distinct, large bullae (nt)

Question 33

So histricomorpha, f chichillidae

Answer 33

both histri, enlarged bullae, molars are rows of transverse plates (nt)

Question 34

So histricomorpha, f myocastoridae

Answer 34

both histri, long paroccipital process, large flange on dentary (nt)

Question 35

So histromorpha, f caviidae

Answer 35

both histri, prominent lateral groove in dentary, upper tooth rows converge in to v and pushed to side, long paroccipital processes (nt)

Question 36

So histrocomorpha, f dasyproctidae

Answer 36

both histri, smooth elongate skull, lacrimal canal with large opening on side of rostrum, (nt) burrowing, seed dispersers

Question 37

So histricomorpha, f cuniculidae

Answer 37

both histri, heavily ridged skull, large dent on underside of zygomatic arch which is enlarged with large sinuses in adults, (nt)