what was the first mammal to be extincted

Question: what was the first mammal to be extincted
- Keywords:
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  extinction
  
  mammal
Asked by kyle-_-$$$$ to John, Laura, Luke, Rob, Ruth on 17 Jun 2016.
- Laura Finney answered on 17 Jun 2016:
  
  The first animal to go extinct due to humans was this https://en.wikipedia.org/wiki/Cuvieronius
  Apparently it was similar to an elephant!
  
  Unfortunately though just yesterday it was announced that the first mammal to go extinct due to humans causing climate change has happened 🙁
  
  https://www.theguardian.com/environment/2016/jun/14/first-case-emerges-of-mammal-species-wiped-out-by-human-induced-climate-change
- Luke Williams answered on 19 Jun 2016:
  
  Wow I am surprised that we know which one!
  
  I was going to say it is quite difficult to piece together history, simply because we don’t necessarily know which pieces we have, which pieces we don’t have and we don’t have the picture on the box to work from. Am in awe of the scientists and historians that do piece together the past.

Question: what was the first mammal to be extincted