Lab 5

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Last updated 4:52 PM on 9/29/26
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16 Terms

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Metatheria

Marsupials

  • short gestation, long lactation period

  • epipubic bones

  • pouch or lateral folds on females


<p>Marsupials</p><ul><li><p>short gestation, long lactation period</p></li><li><p>epipubic bones</p></li><li><p>pouch or lateral folds on females</p></li></ul><p></p>
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Biogeography

The distribution of species and ecosystems in geographic space and through geologic time

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Marsupial biogeography

  • The common ancestor of marsupials originated in North Amercia and dispersed to Gondwana

  • They migrated through South America then Antarctica then over a land bridge to Australia

  • South America broke from Gondwana and the animals experienced allopatric speciation


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Polydactylus vs Syndactylus

Polydactylus - finger bones are not fused and there is skin between digits

Syndactylus - finger bones of some or all digists are fused and there is no skin between them


<p>Polydactylus - finger bones are not fused and there is skin between digits</p><p>Syndactylus - finger bones of some or all digists are fused and there is no skin between them</p><p></p>
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Polyprotodont vs Diprotodont

Polyprotodont - many incisors

Diprotodont - 2 incisors

** placental mammals will have a maximum of 3 incisors**


<p>Polyprotodont - many incisors</p><p>Diprotodont - 2 incisors</p><p>** placental mammals will have a maximum of 3 incisors**</p><p></p>
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Order Didelphimorphia

American opossum and opossums

  • North and South America

  • polyprotodont

  • polydactylus


<p>American opossum and opossums</p><ul><li><p>North and South America</p></li></ul><ul><li><p>polyprotodont</p></li><li><p>polydactylus</p></li></ul><p></p>
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Order Paucituberculata

Shrew opossums

  • South America

  • diprotodont

  • polydactylus

  • lack a pouch


<p>Shrew opossums</p><ul><li><p>South America</p></li><li><p>diprotodont</p></li><li><p>polydactylus</p></li><li><p>lack a pouch</p></li></ul><p></p>
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Order Microbiotheria

Monito del monte

  • South America

  • polyprotodont

  • polydactylus


<p>Monito del monte</p><ul><li><p>South America</p></li><li><p>polyprotodont</p></li><li><p>polydactylus</p></li></ul><p></p>
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Order Notoryctemorphia

Marsupial moles

  • Australia

  • polydactylus

  • neither polyprotodont or diprotodont

  • vestigal eyes


<p>Marsupial moles</p><ul><li><p>Australia</p></li><li><p>polydactylus</p></li><li><p>neither polyprotodont or diprotodont</p></li><li><p>vestigal eyes</p></li></ul><p></p>
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Order Peramelemorphia

Bandicoots and bilbies

  • Australia and New Guinea

  • syndactylus

  • polyprotodont


<p>Bandicoots and bilbies</p><ul><li><p>Australia and New Guinea</p></li><li><p>syndactylus</p></li><li><p>polyprotodont</p></li></ul><p></p>
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Order Dasyuromorphia

Carnivorous marsupials

  • Australia, New Guinea, Tasmania

  • polyprotodont

  • polydactylus


<p>Carnivorous marsupials</p><ul><li><p>Australia, New Guinea, Tasmania</p></li><li><p>polyprotodont</p></li><li><p>polydactylus</p></li></ul><p></p>
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Patagium/patagia

Membrane of skin used for flying or gliding

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Marsupium

Pouch that protects eggs, offspring, or reproductive structure

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Ricochetal locomotion

Leaping locomotion (kangaroo)

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Fusiform

Tapering at both ends, spindle shaped body

<p>Tapering at both ends, spindle shaped body</p>
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Fenstrated palate

having perforations, aperatures, or transparents areas

<p>having perforations, aperatures, or transparents areas</p>