The Rhytidoidea are a superfamily
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 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 and slug
Slug is a common name that is normally applied to any gastropod mollusc that lacks a shell, has a very reduced shell, or has a small internal shell...

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...

 gastropod mollusks in the informal group Sigmurethra
Sigmurethra is a taxonomic category of air-breathing land snails and slugs, terrestrial pulmonate gastropod molluscs. This is an Informal Group which includes the majority of land snails and slugs....


This taxonomy was based on the study by Nordsieck, published in 1986.


Families within the superfamily Rhytidoidea are as follows:
  • Family Rhytididae
    Rhytididae is a taxonomic family of medium-sized predatory air-breathing land snails, carnivorous terrestrial pulmonate gastropod molluscs in the superfamily Rhytidoidea.This family has no subfamilies.-Anatomy:...

      Pilsbry, 1893
  • Family Chlamydephoridae
    Chlamydephoridae is a family of air-breathing land slugs, terrestrial pulmonate gastropod mollusks in the clade Eupulmonata .These snails are presumed to be true carnivores...

      Cockerell, 1935
  • Family Haplotrematidae
    Haplotrematidae is a taxonomic family of predatory air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Rhytidoidea.-Distribution:These are North American land snails...

      H.B. Baker, 1925
  • Family Scolodontidae
    Scolodontidae is a taxonomic family of air-breathing land snails, terrestrial pulmonategastropod mollusks in the superfamily Rhytidoidea .-Taxonomy:...

    H.B. Baker, 1925
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