Length 27 mm, height 16 mm, breadth 13 mm. Shell oval in outline with beak situated posterior to the center, directed posteriorly. Margins gentle but slightly angulated anteriorly. Hinge teeth 18─20 in anterior half and 8 in posterior. Chondrophore spoon-shaped, slanting, fused to the cardinal plate. Surface with olive-colored perios-tracum. Interior pearly, with smooth ventral margin.
Distribution:
Slope to bathyal zones, off Suriname, Brazil to Argentine.
Remarks:
Present findings may be the northern range extention.