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Flashcards in Lab 3 Deck (23)
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1
Q

What orders are contained within Monotremata?

A

Tachyglossidae (echidnas) and Ornithorhynchidae (platypus)

2
Q

Characteristics of Monotremes

A
Oviparous 
Cloaca
Mammary glands lack nipples
Adults with no teeth
lack A.B., jugal, lacrimal
3
Q

Monotremes are Marsupials share what distinct characteristic?

A

Epipubic bone

4
Q

Ornithorhynchidae

  • common name?
  • characterists?
A
hair, bill, webbed feet
venomous barbs on males 
electroreceptors in bill
no pouch 
young with 3 molars
5
Q

Tachyglossidae

  • common name?
  • characterists?
A

long “snout” with receptors
hair are spines
large scoop-like claws
barbs on hind legs

6
Q

Metatherians

- classification?

A
metatheria = infraclass
theria = class
class = mammalia
7
Q

Didelphiorphia

  • common name
  • classification
  • adaptation to arboreal envr?
  • diet?
A
American opossum 
metatheria
- prehensile tail
- omnivorous 
"play possum"
8
Q

Pacituberculata

A

shrew opossums

metatheria

9
Q

Microbiotheria

A

monito de monte
nocturnal and arboreal
partially prehensile tail
insectivore

10
Q

dasyuromorphia

  • diet
  • dentition
  • fusion of toes?
A

tasmanian devil, noombat marsupials
carnivores/scavengers/insectivores
polyprotodont
didactylous

11
Q

peramelemorphia
diet?
dentition?
fusion?

A

bandicoots and bilbies
omnivorous
polyprotodont
syndactylyl

12
Q

notoryctemorphia
what direction do they dig?
adaptation to habitat?

A

marsupial moles
fossorial - dig up and down
blink

13
Q

diprotodontia

A

roos, wallabes, possums, koalas, wombats, etc

14
Q

official name for “pouch”

purpose?

A

Marsupium

encloses teats, underdeveloped young crawl to teats to further develop

15
Q

Metatherian reproduction

A

F w/ 2 vaginal canals and uteri
M w/ double headed penis
M w/ scrotum anterior to penis
No baculum

16
Q

Difference between primitive marsupial dentition and primitive eutherian dentition

A

Marsup = 50 teeth
-more incisors and molars
Euth = 44 teeth
- more premolars

17
Q

Dasyuromorphia - Tasmanian wolf skull compared to coyote skull?

A

Mars=palatal fenest., small/posterior AB, teeth gradually change
Euth=no palatal fenest., large AB., teeth distinctly change

18
Q

Diprotodontia

  • what is it?
  • dentition?
  • fusion of toes?
A

lower jaw shortened and first lower incisor elongated
diprotodont
syndactylous

19
Q

Polyprotodont

-what is it?

A

unshortened mandible and lower incisor small and unspecialized

20
Q

Skull features of metatheria

A
fenestrated palate
inflected angular process
small braincase
small AB 
pronounced sagittal crest
21
Q

didactylous definition

A

unfused toes

22
Q

syndactylous definition

A

fused toes

23
Q

what is unique about the hall in marsupials? How does it vary based on habitat?

A

the big toe is clawless.

opposable in arboreal species, reduced/absent in others