Creseis virgula (Rang, 1828) forma constricta Chen and Bé, 1964
Shell transparent, short, narrow, tube-shaped, slightly curved, cross-section circular, surface smooth. Well defined constriction separates protoconch from adult portion; protoconch with a distinct bulge, gradually increasing in size toward anterior part of adult shell. Shell length: 0.54 mm, diameter: 0.12 mm.