In general shell characters, this species most closely resembles the extant Japanese Ancillaria albocallosa Lischke, 1873, and it's probable precursor, the Pliocene Ancilla okawai Yokoyama, 1923.
Upper Pliocene. Waipipian-Mangapanian [Piacenzian]. Waipipi, New Zealand (Olson, 1956).
"This species is very like gulosa Fleming but it is distinguished by the following characters: body whorl strongly retracted to suture, but not as swollen as in gulosa; aperture longer, outer lip less convex. Spire mucronate as in gulosa. Callus margin markedly concave from top of columella to the pronounced throat, thence stronglty convex to top of spire. Height, 54.7 mm.; diameter, 25.5 mm. (holotype). Height, 56.8 mm.; diamater, 27.6 mm. (paratype).". Pliocene. Waipipi, New Zealand.
Paratype also in NPC.
