Monotremes and Marsupials Flashcards Preview

Biology of Mammals Lecture > Monotremes and Marsupials > Flashcards

Flashcards in Monotremes and Marsupials Deck (19)
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1
Q

monotreme vs marsupial reproduction

A

mono: oviparious, mammary glands but no nipples,
mars: viviparous - highly altricial, mammary glands and nipples,

2
Q

What two families are in monotremata?

A

ornithorhynchidae

tachyglossidae

3
Q

Primitive characters of monotremata

A
sprawled posture
mammae w/o nipples
cloaca
oviparity
no A.B.
Epipubic bones
4
Q

Derived characters of montremata

A
electroreception
rhinariu
highly modified limbs
reduced dentition
spurs
5
Q

pectoral girdle in monotremata is more like a ____

A

therapsid

6
Q

what metatherian order is diprotodont and didactylous?

A

paucituberculata

7
Q

what metatherian order is polyprotodont and syndactylous

A

peramelemorphia

8
Q

what metatherian order is diprotodont and syndactylous

A

diprotodontia

9
Q

didelphimorphia

A
polyprotodont
opposable clawless thumbs
didactylous
usually prehensile tail 
marsupium
paired sperm
10
Q

what metatherian orders are in america?

A

didelphimorphia
paucituberculata
microbiotheria

11
Q

paucituberculata

A

diprotodont
didactylous
no marsupium
paired sperm

12
Q

microbiotheria

A
nocturnal and arboreal
polyprotodont
didactylous
stores fat in tail
monotreme-like cloaca
13
Q

australian metatherian orders

A

dasyuromorphia
peramelemorphia
notoryctemorphia
diprotodontia

14
Q

dasyuromorphia

A
polyprotodont
didactylous
tasmanian devil
tasmanian wolf
numbat
15
Q

Notoryctemorphia

A

no visible eyes
no pinnae
totally fossorial

16
Q

Peramelemorphia

A

polyprotodont
syndactyly
insectivorous

17
Q

Diprotodontia

A

syndactyly
diprotodont
herbivorous/2narily insectivorous

18
Q

Family Phascolarctidae

A

koalas

19
Q

Family Macropodidae

A
kangaroos
ecological equivalent to antelope
diprotodont
diatemea
mesial drift
walk using tail