Relatives Sharing a Segment on Chromosome 15
This is a group of relatives who share a segment of chromosome 15 from a common ancestor. In this case, at present (19 June 2019) the identity of this person is unknown. It is possibly Joel Morrison and Emilar Buchanan, but this lacks any confirmation. This chromosome segment is usually characterized as "broadly European," which isn't of much help.
The two numbers at the ends of the vertical bars indicate the start and end positions on the chromosome. The vertical line in between these two end lines marks roughly the center point of the overlap among the individuals listed with respect to chromosome 15. Only two chromosomes (Yerton and Garruto) fail to share this point of overlapping.