Asperdaphne contigua
Asperdaphne contigua is an extinct species of sea snail, a marine gastropod mollusk in the family Raphitomidae.
Description
The length of the shell attains 6.8 mm, its diameter 3 mm.A species of Asperdaphne that is broader and possesses a more squat spire than Asperdaphne balcombensis. It shares a similar sculptural pattern but is distinguished by having fewer axial ribs and fewer spiral cords.
The protoconch is similar to that of A. balcombensis but is more elevated. The shoulder of the whorls in the teleoconch is concave and located at four-fifths of the whorl height
Axial sculpture: 12 axial ribs per whorl. They are curved across the concave, smooth shoulder and extend over the base to the anterior end.
Spire whorls bear four narrow but distinct primary spiral cords below the shoulder angle. There is a finer secondary thread in each interspace.
On the shoulder there are two spiral threads situated above the shoulder angle, between the uppermost primary cord and the smooth sinus area.
The anterior end bears 9 strong spiral cords, but no axial sculpture.
All other features are as described for A. balcombensis.