[Recommended]Comparison of Metatherian and Eutherian Mammal Ecology

  Follow the directions for each activity. Answer the essay questions completely using thoughtful ideas, the course text, and outside reference sources, where applicable. Proofread…

 
Follow the directions for each activity. Answer the essay questions completely using thoughtful ideas, the course text, and outside reference sources, where applicable. Proofread answers for potential writing errors. 
 
Part A. Metatherian Mammals
 
  
 
Part A Question1) What are metatherian mammals? What are distinguishing characteristics of metatherian mammals? 
 
Extinct mammals, they are very few living. Metatherians, which comprise marsupials and their closest fossil relatives, were one of the most dominant clades of mammals during the Cretaceous and are the most diverse clade of living mammals after Placentalia. The only living metatherian mammals are the marsupials. There were some extinct metatherians that were not marsupials, such as the Sparassodonts, but as these have gone extinct, a metatherian is now just a synonym for a marsupial Metatherians belong to a subgroup of the northern tribosphenic mammal clade or Boreosphenida. They differ from all other mammals in certain morphologies like their dental formula, which includes about five upper and four lower incisors, a canine, three premolars, and four molar. In metatherians, marsupium is present which is required for carrying the infants
 
Part A Question2) Describe the biogeography of metatherian mammals. 
 
Part A Question3) Using the following websites choose one extant (currently living) metatherian (marsupial) mammal species. Conduct research about the species. Discuss and analyze the species’ anatomy, ecology, and life history. Write a species account of at least 300 words correctly citing the reference source(s) you used. Scientific names are comprised of the genus (capitalized) followed by the species name (not capitalized) and they are italicized. For example, Ornithorhynchus anatinus. 
 
  
 
Site Name
 
 
 
Web Site URL/Address
 
 
 
Mammalogy on the Internet
 
 
 
http://www.mammalsociety.org/mammalogy-internet 
 
 
 
Tree of Life Web Project
 
 
 
http://www.tolweb.org/Mammalia
 
 
 
Animal Diversity Web 
 
 
 
http://animaldiversity.ummz.umich.edu/site/accounts/information/Mammalia.html
 
 
 
Wilson & Reeder’s Mammal Species of the World
 
 
 
http://www.vertebrates.si.edu/msw/mswcfapp/msw/index.cfm
 
 
 
American Society of Mammalogists: Mammalian Species
 
 
 
http://www.mammalsociety.org/publications/mammalian-species
 
 
 
Mammalian Species pdf Site
 
 
 
http://www.science.smith.edu/departments/Biology/VHAYSSEN/msi/
 
 
 
National Geographic Mammals
 
 
 
http://animals.nationalgeographic.com/animals/mammals/
 
Species Scientific Name:
 
Species Common Name: 
 
Species Account: 
 
Part B. Comparison of Metatherian and Eutherian Mammal Ecology
 
  
 
Complete the table using the websites listed in Part B. Match the eutherian (placental) mammal with a similar ecological equivalent metatherian.
 
  
 
Scientific Name of Metatherian   Mammal
 
 
 
Common Name
 
 
 
Ecological Description
 
 
 
Eutherian Mammal Match
 
 
 
Petaurus   breviceps
 
 
 
 
 
 
 
 
 
Vombatus ursinus
 
 
 
 
 
 
 
 
 
Myrmecobius fasciatus
 
 
 
 
 
 
 
 
 
Notoryctes typhlops
 
 
 
 
 
 
 
 
 
Dasycercus cristicauda
 
 
 
 
 
 
 
 
 
Sarcophilus harrisii
 
 
 
 
 
 
 
 
 
Thylacinus   cynocephalus
 
 
 
 
 
 
 
List of Eutherian Mammals to Match
 
Peromyscus polionotus
 
Talpa europaea 
 
Glaucomys volans
 
Taxidea taxus
 
Myrmecophaga tridactyla
 
Canis latrans 
 
Marmota flaviventris 
 
Part B Essay Question: What are potential hypotheses (explanations) regarding why there are ecological equivalents between many metatherians and eutherians? Discuss your hypothesis in terms of the processes that could lead to the current ecologies and distributions of metatherians and eutherians.  
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