Allopeas gracile explained

Allopeas gracile, common name the graceful awlsnail,[1] is a species of small, tropical, air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinidae.

Description

The length of the shell varies between 9.8 mm and 12.1 mm; its diameter between 2.9 mm and 3.3 mm.

(Original description) Animal: The animal is equipped with four retractile tentacles, with the upper pair being longer and bearing eyes at their tips. The foot is elongated, rather rounded at the rear, and truncated at the front. Its color is a pale yellowish hue.

Shell: The shell is transparent, thin, and rather colorless, with a spire that tapers gradually. It consists of 12 whorls, with the body whorl equal in size to the two preceding whorls. The aperture is semi-ovate, longer than it is wide. The columellar lip is straight and slightly reflected, while the outer lip is finely edged. [2]

(Recent description) The shell is conically elongated and slender, with a translucent, glossy surface of pale yellowish hue. It comprises 7½ to 8 whorls, tapering gradually towards a blunt apex. The protoconch consists of approximately two smooth whorls, while the subsequent whorls are adorned with obliquely arranged, fine, and densely packed riblets. The spire tapers evenly, and the whorls are flatly convex with a wide, shallow suture. The last whorl is the largest. The aperture is tall and oblong, with a thin peristome. The columellar margin near the umbilicus is slightly expanded, and the columella is straight. The umbilicus is narrowly open. [3]

Distribution

Allopeas gracile occurs throughout the tropics and subtropics worldwide.

It is also found living in greenhouses in other areas, as a "hothouse exotic".

Synonyms

References

This article incorporates CC-BY-3.0 text from the reference.[6]

External links

Notes and References

  1. https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=567215 "Allopeas gracile (Hutton, 1834)"
  2. Hutton . T. . On the land shells of India . The Journal of the Asiatic Society of Bengal . 1834 . 3 . 26 . 81–93 . 27 August 2024.
  3. Man, N. S., Ablett, J. D., Lwin, N., Sutcharit, C. & Panha, S. . Contributions on a small collection of the former Subulinidae Fischer & Crosse, 1877 (Eupulmonata, Achatinoidea) with catalogue of the Glessula and Rishetia species recorded from Myanmar. . ZooKeys . 2024 . 1208 . 173–239 . 10.3897/zookeys.1208.116083 . free . 39114566 . 2024ZooK.1208..173M . 11303849 . (This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0))
  4. Web site: Cook Islands Biodiversity : Allopeas gracile - Graceful Awlsnail.
  5. Rowson B., Warren B. H. & Ngereza C. F. (2010). "Terrestrial molluscs of Pemba Island, Zanzibar, Tanzania, and its status as an "oceanic" island". ZooKeys 70: 1-39. .
  6. Robinson D. G., Hovestadt A., Fields A. & Breure A. S. H. (July 2009). "The land Mollusca of Dominica (Lesser Antilles), with notes on some enigmatic or rare species". Zoologische Mededelingen 83 http://www.zoologischemededelingen.nl/83/nr03/a13

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