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Stylommatophora is the most diverse group of land snails and slugs. Pallial cavity forms a spacious, air-filled lung. Anus is located on the right side close to the pneumostome. Operculum is missing. Two pairs of tentacle are retractable and the posterior pair bears eyes on the tips. Radula typically has many small, quite uniform teeth per row.
Pulmonata or pulmonates is an informal group (previously an order, and before that, a subclass) of snails and slugs characterized by the ability to breathe air, by virtue of having a pallial lung instead of a gill, or gills. The group includes many land and freshwater families, and several marine families.
Planorbidae, common name the ramshorn snails or ram's horn snails, is a family of air-breathing freshwater snails, aquatic pulmonate gastropod molluscs. Unlike most molluscs, the blood of ram's horn snails contains iron-based hemoglobin instead of copper-based hemocyanin . [ 3 ]
Salinator fragilis is a species of small, air-breathing land snail with an operculum, a pulmonate gastropod mollusc in the family Amphibolidae. The species is sometimes referred to as the fragile air breather. [1] It was originally described as being in the genus Ampullaria, but was split off into the genus Salinator in 1900 by Charles Hedley. [2]
This small snail is commonly found in the intertidal zone of mangroves amongst the roots and branches. It is similar in appearance to Melampus bidentatus and the two are often confused. Melampus bidentatus is slightly larger and is more likely to be found in a salt marsh as opposed to mangrove habitat for Melampus coffea .
Shell of marine snail Lunella torquata with the calcareous operculum in place Gastropod shell of the freshwater snail Viviparus contectus with corneous operculum in place. An operculum (Latin for 'cover, covering'; pl. opercula or operculums) is a corneous or calcareous anatomical structure like a trapdoor that exists in many (but not all) groups of sea snails and freshwater snails, and also ...
Amphibola is a genus of small, air-breathing terrestrial or semi-marine snails with an operculum, pulmonate gastropod molluscs in the family Amphibolidae. [1] Species
Stylommatophora is an order [3] of air-breathing land snails and slugs, terrestrial pulmonate gastropod molluscs. This taxon includes most land snails and slugs . Stylommatophorans lack an operculum , but some close their shell apertures with temporary "operculum" ( epiphragm ) made of calcified mucus.