We have a winner of March Mammal Madness! With more than 4,600 voting in the final round for the nickname for our hypothetical placental ancestor, the winner is... 

This is it—the final matchup. We started with 32 potential names for our hypothetical placental ancestor. Now we’re down to two: Mancestor and Shrëwdinger. Which will it be? It’s your decision. Cast your vote now and give this creature a name!

It's down to just a final, furry 4 potential nicknames for our hypothetical placental ancestor! Vote for the two finalists now.

Okay, just 8 possible nicknames left. Does our hypothetical common placental ancestor look more like a Placentor or a Mancestor? Nova or Hypotheshrew? Make your vote today for a final, furry 4!

Nearly 3,000 people cast their vote during our first round of March Mammal Madness, narrowing the possible names for our hypothetical common placental ancestor down to 16. Help us narrow down the choices even further by voting for your favorites below. You have until 5 pm EDT on Tuesday, March 19, to make your selections.