In the latest classification of the family Conidae by Puillandre N., Duda T.F., Meyer C., Olivera B.M. & Bouchet P. (2015), Monteiroconus has become a subgenus of Conus as Conus (Monteiroconus) da Motta, 1991 (type species Conus ambiguus Reeve, 1844) represented as Conus Linnaeus, 1758 [2]
The basic shell shape is conical to elongated conical, has a deep anal notch on the shoulder, a smooth
periostracum and a small
operculum. The shoulder of the shell is usually nodulose and the
protoconch is usually multispiral. Markings often include the presence of tents except for black or white color variants, with the absence of spiral lines of minute tents and textile bars.
Radular tooth (not known for fossil species)
The
radula has an elongated anterior section with serrations and a large exposed terminating cusp, a non-obvious waist, blade is either small or absent and has a short barb, and lacks a basal spur.
Geographical distribution
These species are found in the
Indo-Pacific region.
The shell is obconic in shape. The spire is usually convex in profile, the
protoconch is multispiral. The whorl tops are concave when viewed in cross section, and cords may be present or absent. The anal notch is shallow to moderately deep. The species in this genus have a unique
periostracum which is thick and often scaly. The operculum is small.
Radular tooth (not known for fossil species)
The anterior section and the posterior section of the
radular tooth are about equal in length, and the blade is long and covers about 75% of the length of the anterior section. A basal spur is present, and the barb is short. Serrations are coarse and are usually in a single row.