Agladrillia nakazaense

The length of the shell attains 17 mm (0.67 in), its diameter 6.4 mm (0.25 in).^{[citation needed]}

(Original description) The shell is medium to moderately inflated with rounded whorls.^{[citation needed]} The protoconch is missing in the type specimen. The aperture is less than half the length of the shell and extends anteriorly to form a short, well-defined siphonal canal. The parietal callus is thin except for a small bulge adjacent to the anal sinus.

The sculpture consists of moderately heavy axial ribs, about 5 to 6 visible from an angle, crossed by narrow but sharp raised threads.^{[citation needed]} These threads are somewhat narrower on the subsutural slope and often have secondary threads on the lower part of the columella.^{[citation needed]} The anal fasciole is not distinct because the axial ribs reach nearly to the subsutural collar, and the collar dips gently between the axial ribs.^[2]

This extinct marine species was found in Miocene or Pliocene strata on Okinawa, Japan.^[1]