 Flat white "Crepidula" occurring north of this range are almost certainly "Crepidula plana".Old records often confuse "Crepidula plana", "Crepidula atrasolea" and "Crepidula depressa", and distribution data should be treated with caution, unless it includes observations of development type, body color, or genetic data.The maximum recorded shell length is 15.8 mm.