It’s a bit of a head scratcher because that Henry Shephard, who was one of the authors from the Southern Arc study, explicitly mentions that bone samples were sent from Purcari, Moldova and Giurgiulesti, Moldova to Harvard’s Reich Lab for sequencing to be included in that study. These are very high profile burials. Purcari is a Usatovo burial dating back to 3500 BC. Skeleton was about 2.15 meters tall. Giurgiulesti is thought to be Suvorovo Novodanilovka. Family of 5, kurgan, high status burial, with possible sacrifice of the wife/mother. Dates to about 4100/4200 BC. These skeletons were more gracile in appearance, so possibly admixed with Old Europe groups.