Creseis virgula (Rang, 1828) forma conica Eschscholtz, 1829
Shell transparent, slender, tube-shaped, curved, cross-section circular, surface smooth. With wing protrusions. Most typical is the rounded embryonic shell which does not show rings or constrictions, and the strong curvature (angle between teleoconch and protoconch: 30°). Anterior part of shell straight, posterior section curved dorsally. Shell length: 7 mm, aperture-diameter: 1 mm.