Bostryx granulatus is a species

Species

In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

 of tropical air-breathing land snail

Land snail

A land snail is any of the many species of snail that live on land, as opposed to those that live in salt water and fresh water. Land snails are terrestrial gastropod mollusks that have shells, It is not always an easy matter to say which species are terrestrial, because some are more or less...

, a pulmonate gastropod mollusk in the family Orthalicidae

Orthalicidae

Orthalicidae are a family of tropical air-breathing land snails, terrestrial pulmonate gastropod mollusks are classified in the informal group Sigmurethra of the clade Stylommatophora...

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Description

The topotypes collected show that the granulation, which is visible in fresh collected specimens, fades away when the shells are bleached; otherwise these specimens are characteristic.

Smaller specimens of Bostryx granulatus may also be compared to Bostryx superbus Weyrauch, 1967, a species living at higher altitudes in the same Río Cañete valley. Bostryx granulatus however, may be distinguished by the slightly expanded base of the lip, the more slender shell shape and the granulation on the last whorl.