Q-L53 is a child of Q-M346. It is the parent of Q-L54 and YP4004. From YFull analysis, Q-L53 is between 20,000 and 18,300 years old.
So far, members of this lineage that do not belong to either Q-L54 or Q-YP4004 have not been found. However, the discovery of the Q-YP4004 lineage is relatively recent. Much more testing is needed.