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Most of the non-pulmonate land snails belong to lineages in the Caenogastropoda, and tend to have a gill and an operculum. The largest clade of land snails is the Cyclophoroidea, with more than 7,000 species. [6] Many of these operculate land snails live in habitats or microhabitats that are sometimes (or often) damp or wet, such as in moss.
The shells of these snails often grow to a length of 18 centimetres (7.1 in) with a diameter of 9 centimetres (3.5 in). Certain examples have been surveyed in the wild at 30×15 cm, making them the largest extant land snail species known. [5] [6] Similar to other giant land snails such as L. fulica, A. achatina are herbivores. Their diets ...
Hedleyella falconeri, the giant panda snail, is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Caryodidae. It is the largest species of land snail to be found in Australia.
Lissachatina fulica is a species of large land snail that belongs in the subfamily Achatininae of the family Achatinidae. [1] It is also known as the giant African land snail. [2] It shares the common name "giant African snail" with other species of snails such as Achatina achatina and Archachatina marginata. This snail species has been ...
The anatomy of a common air-breathing land snail: much of this anatomy does not apply to gastropods in other clades or groups. Snails are distinguished by an anatomical process known as torsion, where the visceral mass of the animal rotates 180° to one side during development, such that the anus is situated more or less above the head. This ...
Achatina fulica Bowdich, 1822 or giant East African snail from Eastern Africa is a serious pest in the many tropical countries where it has been introduced, and is listed as an invasive species by some governments: synonym of Lissachatina fulica (Bowdich, 1822) Achatina glaucina E. A. Smith, 1899: synonym of Lissachatina glaucina (E. A. Smith ...
The largest known land gastropod is the African giant snail Achatina achatina, the largest recorded specimen of which measured 39.3 centimetres (15.5 in) from snout to tail when fully extended, with a shell length of 27.3 cm (10.7 in) in December 1978. It weighed exactly 900 g (about 2 lb).
This group includes land snails and land slugs. Loss of the shell has taken place many times in different groups that are not evolutionarily closely related, and land snails and slugs are most often treated together as a single group in specialized malacological literature. [2] [3] All terrestrial molluscs belong to the class Gastropoda.