Creseis acicula (Rang, 1828) forma clava (Rang, 1828)
Shell transparent, cross-section circular, surface smooth, short and narrow, tube-shaped, not curved. Body connected by columellar muscle to caudal tip of shell; this muscle disappears quickly above attachment to shell into visceral mass, only small part of it running free in shell lumen. With wing protrusions. Embryonic shell tip rounded; outline of caudal section shows two or more swellings caused by transverse rings below concave portion ending in perfectly spherical embryonic end. Shell length: 6 mm, diameter at the aperture: 1 mm.