These are the Arispe , Chase , Flanagan , Greenton , Grundy , Herrick , Ipava , Lagonda , Lamoni , Macksburg , Mahaska , Malvern , Martin , Mayberry , Pawnee , Rutland , Seymour , Shorewood , and Wymore soils in the same family and the Armstrong , Lineville , Mystic , and Shelby series. Arispe, Flanagan, Greenton, Grundy, Herrick, Ipava, Macksburg, Mahaska, Martin, Rutland, Seymour, Shorewood, and Wymore soils have less sand and pebbles in the solum and lack 7.5YR or redder hue in the upper part of the B horizon. Chase and Martin soils have mollic epipedons greater than 24 inches thick. Lagonda soils have less sand and clay and have fewer reddish mottles in the upper part of the solum. Lamoni soils lack 7.5YR or redder hue in the matrix of the upper part of the Bt horizon, lack a stone line, and have 1 chroma mottles in the lower part of the B and the C horizon.
Malvern soils have less sand in the upper part of the solum and lack a stone line.
Mayberry soils have thicker Bt horizons and their lower B and C horizons did not form in glacial till. Pawnee soils lack hues of 7.5YR or redder in the upper part of the B horizon. Armstrong, Lineville, and Mystic soils lack mollic epipedons and have E horizons unless they have been removed by accelerated erosion. Adair soils are on convex summits of narrow interfluves and on convex side slopes at slightly lower elevations than the gray, clayey Yarmouth-Sangamon paleosols. They are commonly in bands at the shoulders of side slopes where geologic erosion has exhumed the late Sangamon paleosols.