Helicoidea
Encyclopedia
Helicoidea is a taxonomic superfamily
of air-breathing land snail
s, terrestrial
pulmonate gastropod mollusks in the clade
Stylommatophora
.
According to H. Nordsieck the family Xanthonychidae (sensu Hausdorf & Bouchet) is probably polyphyletic (contains several different lineages) and therefore should be divided into several families.
Taxonomic rank
In biological classification, rank is the level in a taxonomic hierarchy. Examples of taxonomic ranks are species, genus, family, and class. Each rank subsumes under it a number of less general categories...
of air-breathing land snail
Snail
Snail is a common name applied to most of the members of the molluscan class Gastropoda that have coiled shells in the adult stage. When the word is used in its most general sense, it includes sea snails, land snails and freshwater snails. The word snail without any qualifier is however more often...
s, terrestrial
Terrestrial animal
Terrestrial animals are animals that live predominantly or entirely on land , as compared with aquatic animals, which live predominantly or entirely in the water , or amphibians, which rely on a combination of aquatic and terrestrial habitats...
pulmonate gastropod mollusks in the clade
Clade
A clade is a group consisting of a species and all its descendants. In the terms of biological systematics, a clade is a single "branch" on the "tree of life". The idea that such a "natural group" of organisms should be grouped together and given a taxonomic name is central to biological...
Stylommatophora
Stylommatophora
Stylommatophora is a taxon of air-breathing land snails and slugs, terrestrial pulmonate gastropod molluscs. This taxon is currently considered to be a clade. It was previously regarded as an infraorder...
.
Families
There are 19 families within the superfamily Helicoidea according to Bouchet & Rocroi (2005).- HelicidaeHelicidaeThe Helicidae, sometimes known as the typical snails, are a taxonomic family of small to large, air-breathing, land snails. In other words, they are terrestrial pulmonate gastropod mollusks....
- BradybaenidaeBradybaenidaeBradybaenidae is a taxonomic family of medium-sized to small land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea....
- CamaenidaeCamaenidaeCamaenidae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea.This is one of the most diverse families in the clade Stylommatophora....
- CepolidaeCepolidae (gastropods)Cepolidae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea .-Anatomy:...
- CochlicellidaeCochlicellidaeCochlicellidae is a family of small air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea ....
- ElonidaeElonidaeElonidae is a family of air-breathing land snails, terrestrial pulmonate gastropods mollusks in the superfamily Helicoidea.This family is within the clade Eupulmonata ....
- EpiphragmophoridaeEpiphragmophoridaeEpiphragmophoridae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea . This family has no subfamilies.-Anatomy:...
- HalolimnohelicidaeHalolimnohelicidaeHalolimnohelicidae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea . This family has no subfamilies.-Genera :...
- HelicodontidaeHelicodontidaeHelicodontidae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the clade Eupulmonata .- Taxonomy :...
- HelminthoglyptidaeHelminthoglyptidaeThe Helminthoglyptidae are a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea.This is a large and diverse group of new world snails, ranging in distribution from Alaska through North America to the West Indies, Central America, and as far...
- HumboldtianidaeHumboldtianidaeHumboldtianidae is an American family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea .-Anatomy:...
- HygromiidaeHygromiidaeHygromiidae is a taxonomic family of small to medium-sized air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea.-Anatomy:...
- MonadeniidaeMonadeniidaeMonadeniidae is a taxonomic family of small to medium sized air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea . This family has no subfamilies.-Anatomy:This family is defined by an absent diverticulum...
- PleurodontidaePleurodontidaePleurodontidae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea.This family is classified within the clade Stylommatophora within the clade Eupulmonata...
- PolygyridaePolygyridaePolygyridae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea.The Polygyridae make up a significant proportion of the land snail fauna of eastern North America, and are also found in western North America, northern Central America, and...
- SphincterochilidaeSphincterochilidaeSphincterochilidae is a taxonomic family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea ....
- ThysanophoridaeThysanophoridaeThysanophoridae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea .These are common woodland snails of North America...
- TrissexodontidaeTrissexodontidaeTrissexodontidae is a family of land snails, gastropods in the superfamily Helicoidea .This family has no subfamilies...
- XanthonychidaeXanthonychidaeXanthonychidae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea.This family is within the clade Eupulmonata ....
According to H. Nordsieck the family Xanthonychidae (sensu Hausdorf & Bouchet) is probably polyphyletic (contains several different lineages) and therefore should be divided into several families.