Scanning electron microscope images of the shell of Nassarius sinarum Specimen B, collected in this study. A Morphology, characterised by the absence of a developed callus and tooth in the aperture; B Axial ribs exhibiting a consistent appearance as they extend to the outer lip; C Body whorl sculpture; D Protoconch. Scale bar A & B = 2 mm, C = 1 mm, D = 200 μm. For additional scanning electron microscopy images, please refer to Suppl. material