[2] Prior to 2002, there were in academic literature at least seven naming systems for the Y-Chromosome Phylogenetic tree.
They published a joint paper that created a single new tree that all agreed to use.
The table below brings together all of these works at the point of the landmark 2002 YCC Tree.
This allows a researcher reviewing older published literature to quickly move between nomenclatures.
The following research teams per their publications were represented in the creation of the YCC tree.