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2nd Year: Animal Biodiversity > Mammals > Flashcards

Mammals Flashcards

0
Q

What is a cursorial mammal

A

A running animal

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1
Q

What is a fossorial mammal?

A

A burrowing animal

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2
Q

How many species of mammal are there?

A

4800, mammals are the LEAST diverse clade

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3
Q

What is prototheria?

A

The monotremes

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4
Q

What is metatheria?

A

The marsupials

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5
Q

What is eutheria?

A

The placental mammals

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6
Q

What are the 5 unique mammalian characteristics?

A
  1. Hair for endothermy
  2. Lactation
  3. 3 middle ear bones
  4. Significantly enlarged brain
  5. Diphyodonty (2 sets of teeth)
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7
Q

What is theria?

A

A clade containing metatheria and eutheria

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8
Q

Which group is the only group to have nipples?

A

Theria (the marsupials and placentals)

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9
Q

What do monotremes have instead of nipples?

A

Mammary hairs

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10
Q

What is the mammalian stapes homologous to in reptiles?

A

The columella in the middle ear

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11
Q

What is the mammalian incus homologous to in reptiles?

A

The quadrate

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12
Q

What is the mammalian malleus homologous to in reptiles?

A

The articular

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13
Q

How many species of prototherian are there and what are they?

A

5:

1 platypus and 4 echidna

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14
Q

The prototherians have a single posterior opening, what is it called?

A

The cloaca

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15
Q

What can platypuses sense with their snouts?

A

Electromagnetic signals

16
Q

How many eggs do prototherians usually lay?

A

1-3

17
Q

What are the eggs of prototherians like?

A

Leathery eggs

18
Q

How many species of metatherian are there?

A

270

19
Q

Why are metatherians born at such a low birth weight?

A

The young are born as foetuses with overdeveloped forelimbs to crawl to the pouch. There they latch onto a nipple and develop outside the body.

20
Q

What are the didelphimorphia?

A

The American opossums

21
Q

What are the paucituberculata?

A

American shrews

22
Q

What are the microbiotheria?

A

South American monito del monte

23
Q

What are the dasyuromorphia?

A

Carnivorous Australian marsupials

24
Q

What are the peramelamorphia?

A

Australian bandicoots and bilbies

25
Q

What are the notoryctemorphia?

A

Australian me arsupial moles

2nd Year: Animal Biodiversity (16 decks)

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