Pila gracilis

Pila gracilis
Shell of Pila gracilis (specimen at the Museum of Natural History, London)
Conservation status
Least Concern  (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
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 complicataReeve, 1856 (junior synonym) Ampullaria gracilisI. Lea, 1856 (original combination) Pachylabra gracilis(I. Lea, 1856) superseded combination

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

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]

References

1. Pila gracilis(I. Lea, 1856) . 1 June 2025. Retrieved through: World Register of Marine Species .
2. Lea, I. (1856). "Description of thirteen new species of exotic Peristomata". Proceedings of the Academy of Natural Sciences of Philadelphia. 8 (3): 110. Retrieved 1 June 2025. This article incorporates text from this source, which is in the public domain .

External links

• Reeve, L.A. (1856). Monograph of the genus Ampullaria. In: Conchologia Iconica, or illustrations of the shells of molluscous animals, vol. 10,. London: Reeve & co. Retrieved 1 June 2025.
• Ng, T. H.; Annate, S.; Jeratthitikul, E.; Sutcharit, C.; Limpanont, Y.; Panha, S. (2020). "Disappearing apple snails (Caenogastropoda: Ampullariidae) of Thailand: a comprehensive update of their taxonomic status and distribution". Journal of Molluscan Studies.
• Brandt, R.A.M. (1974). "The non-marine aquatic Mollusca of Thailand" (PDF). Archiv für Molluskenkunde. 105 (i–iv): 51. Retrieved 1 June 2025.