Decollate snail

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Rumina decollata
Rumina decollata 0106.JPG
A live individual of the decollate snail
Scientific classification
R. decollata
Binomial name
Rumina decollata
  • Bulimus decollatus Draparaud, 1805
  • Helix decollata Linnaeus, 1758
  • Orbitina incomparabilis (Germain, 1930)
  • Orbitina truncatella (Germain, 1930)

The decollate snail, scientific name Rumina decollata, is a medium-sized predatory land snail, a species of terrestrial pulmonate gastropod mollusk in the family Achatinidae.[2] It is a European species that has been introduced in a number of areas worldwide.


This species is native to the Mediterranean excluding south-east Mediterranean.[3]

It is introduced in Israel and in Egypt[4] since Roman times.[3] It has been introduced into North America, including Phoenix and Glendale, Arizona, and other areas Fresno, California as a biological control agent, in hopes of controlling populations of the brown garden snail.

It is found in Great Britain, as a "hothouse alien"

Shell description[edit]

The shell of the decollate snail is long and roughly cone-shaped. It grows to approximately 40 mm in length, and upon reaching mature size, grinds or chips off the end of its own shell by moving its body roughly against hard surfaces, so that the shell takes on a decollate shape, tapering to a blunt end.

Life habits[edit]

Front view of decollate snail from Austin, Texas
Lateral view of decollate snail

Rumina decollata is a voracious predator, and feeds readily upon common garden snails and slugs and their eggs. The snail eats plant matter as well, but the damage it causes to plants is considered minor when compared with the benefit of its predation on garden snails and other pest species of snails. Unfortunately it will also consume harmless local species of land gastropods, and beneficial annelids.

Decollate snails are tolerant of dry and cold conditions, during which they burrow deep into the soil. They are most active during the night and during rainfall.


  1. ^ Linnaeus C. 1758. Systema naturae per regna tria naturæ, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus I. Editio decima, reformata. pp. [1-4], 1-824. Holmiae. (Salvius).
  2. ^ Bank, R. (2017). Classification of the Recent terrestrial Gastropoda of the World. Last update: July 16th, 2017.. World Register of Marine Species, Retrieved 10 January 2019.
  3. ^ a b Mienis H. K. (2003). "A new colony of Rumina saharica discovered in Israel". Tentacle 11: 11-12.
  4. ^ Commonwealth of Australia. 2002 (April) Citrus Imports from the Arab Republic of Egypt. A Review Under Existing Import Conditions for Citrus from Israel Archived January 9, 2009, at the Wayback Machine. Agriculture, Fisheries and Forestry, Australia. Caption: Gastropods, page 12 and Appendix 2.

External links[edit]