Pila gracilis

Pila gracilis, is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Ampullariidae, the apple snails.^[1]

Pila gracilis
Shell of Pila gracilis (specimen at the Museum of Natural History, London)
Conservation status
Least Concern  (IUCN 3.1)
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Architaenioglossa
Family:	Ampullariidae
Genus:	Pila
Species:	P. gracilis
Binomial name
Pila gracilis (I. Lea, 1856)
Synonyms[1]
Ampullaria complicata Reeve, 1856 (junior synonym) Ampullaria gracilis I. Lea, 1856 (original combination) Pachylabra gracilis (I. Lea, 1856) superseded combination

Distribution

This species occurs in southeast Asia: Thailand, Malaysia, Vietnam, Laos, the Philippines.

Description

The height of the shell varies between 35 mm and 40 mm.

(Original description in Latin) The shell is regularly elliptical and yellowish-olive, transversely banded throughout. It is rather thin, narrowly umbilicate, smooth, and shiny. The spire is emergent, and the sutures are slightly impressed. The shell contains about six somewhat convex whorls. The aperture is ovate, dark brown internally, and obsoletely banded. The outer lip is acute, the umbilicus is strongly compressed, and the columella is smooth.^[2]