[3][4] Most species of Perrottetia live in India, but there are additional species of this genus known from Sri Lanka, Myanmar, Thailand, Laos,[5] North to South Vietnam[6] and Hainan Island and Taiwan in Southern China.

[2] The most prominent characters of Perrottetia are the sub-oblique heliciform shell, often with whorls coiling around an oblique axis.

The outer wall of the last whorl generally possesses two short longitudinal furrows that correspond with internal apertural lamellae.

The brown digestive gland and the black kidney are visible through the transparent shell.

Vas deferens passes through a short section of penial sheath before connecting distally to penis.

[2] Up to 2013, all nominal species of Perrottetia were described over a century ago and were often based on brief descriptions with poorly detailed figures.

[2] This article includes CC-BY-3.0 text from the reference[2] Media related to Perrottetia (Streptaxidae) at Wikimedia Commons