DIAGNOSIS: A small, stout, almost smooth Nucula, with blunt umbones, convex valves, concentric sculpture on anterior area only, and a denticulated inner ventral margin. Nearest relatives are Nucula praetenta (Iredale) and Nucula torresi Smith, from which it differs in being relatively longer, in presence and distribution of concentric sculpture and in having a relatively larger chondrophore.
DESCRIPTION: Valve stout, triangular-ovate, convex. Umbo blunt. Dorsal margin arched, posterodorsal curve not angular, posterior side truncated, posteroventral angulation well marked. No anterodorsal angulation, anterior side slightly curved, anteroventral curve broad, ventral side evenly rounded, somewhat straight posteriorly. Embryonic shell with a pitted outer surface, umbo slightly bifid, interdissoconch smooth and with imperceptible border, rest of valve smooth except for 5 to 9 usually prominent ribs which sculpture the anteroventral area. In the median area a subsuperficial structure of radiating lines is visible, in the lectotype 73 near the margin, and not extending, apparently, to anterior and posterior areas. Periostracum lost in the specimens studied. Valve shining white exteriorly, silverish white interiorly. Hinge with up to 6 anterior and 5 posterior V-shaped secondary teeth. Teeth rows separated by a small chondrophore. Chondrophore almost vertical, hardly projecting beyond hinge line, rounded at ventral side. In the lectotype the ventral side of the chondrophore is slightly damaged. Anterior adductor muscle scar partly visible, posterior one and pallial line unapparent. Ventral margin finely denticulated internally by the radial structure.vlectotype : Length 1.73 Height 1.45

Along the northern part of Queensland's east coast (and possibly also in northern Western Australia)