Shell, small, elongate-turreted, nuclear whorls forming an acute apex, consisting of about 2 strongly rounded, smooth whorls, which are succeeded by a short stretch of moderately strong, retractively curved, slender, axial riblets, which in turn give way to heavy post-nuclear sculpture. The postnuclear whorls are angulated at or a little anterior to the middle, and they are appressed at the summit and marked by very strong sigmoid axial ribs, which taper toward the summit and evanesce on the columella. The broad intercostal spaces and the axial ribs are marked by incremental lines and incised spiral lines, the combination producing a somewhat fenestrated pattern. Base rather long, bearing the same sculpture as the spire. Columella short, stubby, marked by irregular incremental lines. Aperture elongate-ovate, decidedly channeled anteriorly and with a shallow sinus at the posterior angle; outer lip acute; inner lip reflected over the columella as a callus, extending on the parietal wall.
Type: Rubellatoma rubella (Kurtz and Stimpson)