Shells minute, planorbiform, often carinate or strongly striated spirally, umbilicate, often translucent, operculate.
 

« Shell of small size (2-3mm), solid, usually depressed, spire with 3-4 whorls. Protoconch smooth, between 1 and 2 whorls (most frequently 1 3/4), not elevated. Teleoconch with strong spiral cords crossed by strong axial ribs. External lip crenulated. Aperture subtrigonal. Operculum ovoid, paucispiral and chitinous. » – Rubio & Rolán: “The family Tornidae (Gastropoda, Rissooidea) in the Caribbean and neighboring areas”, Iberus vol.29(2), Barcelona 2011, p.63.