A living species of the fossil genusKakabekia, isolated from a soil sample secured at Harlech Castle, Wales, is described. It resembles the type speciesK. umbellataBarghoorn in all major respects: tripartite structure consisting of mantle, stiple and basal enlargement, and size range of 5–15 μ. Variations in the cultured form include mantle margin (entire to scalloped), mantle radial structure (6‐ to 8‐parted, but sometimes 5‐ to 9‐parted) and concentric rings. The nameK. barghoornianais proposed in recognition of the discoverer and author of the fossil genus.