Shell: Textile bars are absent (compare Cylinder). Spiral lines of minute tents are present. The sides of the body are convex; Anal notch moderate to shallow. Nodules die out in the early postnuclear whorls, and are allways poorly developed. Operculum is small. Periostracum is smooth. Protoconch can be multispiral or paucispiral. Bodywhorl has minute ridges.
Radular features: Anterior section of the radular tooth is greatly elongated, compared to the posterior part. Barb and blade are short. Serrations and a terminating cusp are present. Waist is not obvious.

Darioconus is simular to Leptoconus in having rows of minute tents. But the sides of the body whorl of Darioconus are convex, while the shells of Leptoconus are more conical. Ornamentation of Darioconus (ridges) is spread over the whole body whorl, while in Leptoconus the ornaments are restricted to the anterior part.
Radular morfology of Darioconus and Leptoconus is identical.

The species included in the genus occur in the Indo-Pacific region.