Our mystery seeds from last week were from a cyclamen flower, genus Cyclamen.
They are grown as houseplants and ornamentals throughout the world, but are native to the regions around the Mediterranean Sea.
There is a better photograph of the seed pods at Wikimedia. Notice the seeds on the ground at the left.
According to what I read, the seeds are often picked up and dispersed by ants.
Have you ever grown cyclamen plants?