Fragum grasi was named by Ter Poorten (2009) [Shell very small to small (H 5-8 mm), rather solid, moderately inflated, outline rounded and slightly inequilateral with umbo just in front of the midline. L/H ratio 0.96-1.03 (mean 1.00, n = 11). Circa 15-21 strong, rounded ribs, regularly sculptured with tubercles or coarse scales, becoming more prominent anteriorly and much weaker poste- riorly. Ribbing less pronounced on the posterior slope, of a more irregular strength and occasionally with a secondary riblet. Rib impressions clearly visible throughout shell interi- or, margins crenulated. Interstices wide, about the same width as ribs, with clearly developed concentric striae. Lunula small, escutcheon almost indiscernible, dorsal margin indent- ed immediately anterior to umbones. Hinge typical for the genus with lateral teeth inequidistant from cardinals, anterior laterals closer than posterior laterals. Hinge plate rather nar- row and gently curved. Shell exterior and interior completely dull white or cream.]. It is extant. Its type specimen is PMBP 2004.