In a clade mammalian has the three descendents monotreme marsupials and eutheria. What will these three descendants together be called?

The three descendants of the clade Mammalia—monotremes, marsupials, and eutherians—are collectively referred to as "therian mammals." This term encompasses all mammals that give birth to live young, excluding monotremes, which are egg-laying mammals. Therefore, monotremes, marsupials, and eutherians represent the major evolutionary branches within the mammalian lineage.