The new subclade is defined by I-Y21524 and can been seen on the new v4.5 tree. Our two Brewer DNA Project members who form this subclade are id nos. YF05626 and YF04443. Please see the May 26th post for their EKAs. In short, I-Y21524 is a branch of I-Y15031. While all six participants are defined by I-Y15031, only two are defined by I-Y21524.
We do have lineages for each of the six current "Lanier-Brewer" Group members who comprise this branch of the YTree. They can be found online at the "Brewer/Lanier Pedigrees" page of the "Brewer DNA Project Pedigrees" website. To locate these particular pedigrees you will need the FTDNA kit numbers that correspond to the YFull id numbers. They are as follows:
PDF version of this post