Cylinder is a subgenus of sea snails, marine gastropod mollusks in the genus Conus, in the family Conidae, the cone snails and their allies. In the new classification of the family Conidae by Puillandre N., Duda T.F., Meyer C., Olivera B.M. & Bouchet P. (2015), Cylinder has become a subgenus of Conus: Conus (Cylinder) Petuch & Sargent, 2012 represented as Conus Thiele, 1929. The same study found Cylinder to be polyphyletic, but morphologically consistent, possibly corresponding to grades. Conus ammiralis, Conus canonicus and Conus dalli cluster with the type species Conus textile, the others form a separate clade. Distinguishing characteristics The Tucker & Tenorio 2009 taxonomy distinguishes Cylinder from Conus in the following ways: Genus Conus Linnaeus, 1758 Shell characters (living and fossil species) 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. Feeding habits These species eat other gastropods including cones. Subgenus Cylinder Montfort, 1810 Shell characters (living and fossil species) The shell is ovate to elongated in shape. The protoconch is multispiral, the spire is conical to convex in shape. The anal notch is deep. The shell is conspicuously ornamented with rows of tents or textile bars. The periostracum is smooth, and the operculum is small. Radular tooth (not known for fossil species) The anterior section of the radula is substantially more elongated than the posterior section. The waist is not obvious. A basal spur is absent, and the barb is short. The blade and a terminating cusp are present. Geographical distribution All but one species in this genus are found in the Indo-Pacific region; Cylinder dalli is found in the Eastern Pacific region. Feeding habits These species are molluscivorous (meaning that they prey on other mollusks). Species list This list of species is based on the information in the World Register