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Mammalogy Lab > Monotremes and metatheria 2 > Flashcards

Monotremes and metatheria 2 Flashcards

1
Q

Only Diprotodonts with selenodont molars?

A

Ring-tailed opssum, F Pseudocheiridae

Australian koala, F PHascolarctidae

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2
Q
A
  • angular process bends in
  • palatial vacuities

IC Metatheria

  • diprotodont dentition

O Diprotodontia

  • enlarged premolar set at angle to molars

F Phalangeridae

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3
Q
A
  • reflected angle of dentary (angular process bends in)
  • palatial vacuities

IF Metatheria

  • diprotodont

O Diprotodontia

  • large diastema
  • mesial drift of cheekteeth
  • long, narrow rostrum
  • upper incisors blade-like for cutting

F Macropodidae
LARGE BIPEDAL HERBIVORES

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4
Q
A
  • palatial vacuities
  • reflected angle of dentary

IC Metatheria

  • diprotodont

O Diprotodontia
SO Australidelphia

  • bunodont molars with 4 cusps
  • enlarged comb-like premolar in line with molar row

F Potoroidae
POTOROO

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5
Q
A
  • diprotodont

O Diprotodontia
SO Australidelphia

  • angle of dentary not reflected
  • short rostrum with mesial drift of cheekteeth
  • selenodont molars

F Phascolarctidae
KOALA

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6
Q
A
  • diprotodont

O Diprotodontia
IC Metatheria, SO Australidelphia

  • selenodont molars
  • oval-shaped skull

F Pseudocheiridae

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7
Q
A
  • diprotodont

O Diprotodontia
IC Metatheria, SO Australidelphia

  • incisors 1/1
  • large diastema
  • large masseteric fossa
  • lophodont molars

F Vombatidae

WOMBAT

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8
Q
A
  • edentate (no teeth)

O Monotremata

  • forked rostrum

F Ornithorhynchidae

PLATYPUS

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9
Q
A
  • edentate

O Monotremata

  • long, skinny rostrum

F Tachyglossidae

ECHIDNA

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10
Q
A
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11
Q
A
  • palatial vacuities

IC Metatheria

  • polyprotodont (lower I’s small and unspecialized)
  • didactylous
  • I 5/4

O Didelphimorphia
F Didelphidae

DIDELPHID

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12
Q
A
  • palatial vacuities
  • reflected angle of dentary

IC Metatheria

  • polyprotodont
  • small canines
  • syndactylous

O Peramelemorphia
SO Australidelphia

BANDICOOTS AND BILBIES

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13
Q
A
  • palatial vacuities

IC Metatheria

  • diprotodont

O Diprotodontia

  • bunodont molars
  • light, almost translucent skull

F Acrobatidae

ACROBATID = MARSUPIAL FLYING SQUIRREL

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14
Q
A
  • palatial vacuities
  • reflected angle of dentary

IC Metatheria

  • diprotodont

O Diprotodontia

  • bunodont molars that get smaller posteriorly
  • honeycomb-looking bone of squamosal
  • very long lower incisors (as long as molar tooth row)

F Petauridae

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Mammalogy Lab (5 decks)

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