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The
caudal mucous pit, or
caudal mucous horn, is an anatomical structure on the tail end of the foot of various
land snailA land snail is any of the many species of snail that live on land, as opposed to those that live in salt water and fresh water. Land snails are terrestrial gastropod mollusks that have shells, It is not always an easy matter to say which species are terrestrial, because some are more or less...
s and
slugSlug 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,
terrestrialTerrestrial 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.
The function of this pit is the
resorptionResorption is a process by which a structure is remodeled.Types include:* Bone resorption* Root resorption...
of
mucusIn vertebrates, mucus is a slippery secretion produced by, and covering, mucous membranes. Mucous fluid is typically produced from mucous cells found in mucous glands. Mucous cells secrete products that are rich in glycoproteins and water. Mucous fluid may also originate from mixed glands, which...
when the gastropod is moving (see also Muratov 1999).
An incorrect and yet often-used term for this structure is the "caudal gland".
This area also used to be referred to by the term "caudal pore".
Families
Families of snails and slug where a caudal mucous pit exists in every species include:
- Arionidae
Arionidae, common name the "roundback slugs" or "round back slugs" are a taxonomic family of air-breathing land slugs, terrestrial pulmonate gastropod mollusks in the superfamily Arionoidea.- Distribution :...
:
- Endodontidae
Endodontidae is a taxonomic family of very small air-breathing land snails and slugs, terrestrial pulmonate gastropod mollusks in the superfamily Punctoidea....
- Polygyridae
Polygyridae 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...
- Helicodiscidae
Helicodiscidae is a family of small air-breathing land snails, terrestrialpulmonate gastropod mollusks in the superfamily Punctoidea .- Genera :...
- Daudebardiinae (a subfamily of Oxychilidae
Oxychilidae is a taxonomic family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Gastrodontoidea.- Distribution :...
)
- Urocyclidae
Urocyclidae is a family of air-breathing land snails and semi-slugs, terrestrial pulmonate gastropod mollusks in the superfamily Helicarionoidea, ....
- Helicarionidae
Helicarionidae is a family of air-breathing land snails or semi-slugs, terrestrial pulmonate gastropod mollusks in the superfamily Helicarionoidea.- Distribution :...
- Ariophantidae
Ariophantidae is a taxonomic family of air-breathing land snails and semi-slugs, terrestrial pulmonate gastropod mollusks in the superfamily Helicarionoidea .- Distribution :...
- Systrophiidae (Systrophiidae is a synonym for Scolodontinae, the subfamily of family Scolodontidae
Scolodontidae is a taxonomic family of air-breathing land snails, terrestrial pulmonategastropod mollusks in the superfamily Rhytidoidea .-Taxonomy:...
)
- Dyakiidae
Dyakiidae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Dyakioidea ....
Families/subfamilies where is caudal mucous pit exists only on some species include:
- Ariopeltinae (a subfamily of Oopeltidae
Oopeltidae is a family of air-breathing land slugs, terrestrial pulmonate gastropod mollusks in the superfamily Arionoidea .- Subfamilies and genera :...
)
- Charopidae
Charopidae is a taxonomic family of small air-breathing land snails , terrestrial pulmonate gastropod mollusks in the superfamily Punctoidea .- Subfamilies and genera :The family Charopidae consists of the following subfamilies:* Charopinae Hutton, 1884 - synonyms:...
- Binneyidae
Binneyidae is a family of air-breathing land slugs, terrestrial pulmonate gastropod mollusks in the superfamily Arionoidea .- Genera :The family Binneyidae has no subfamilies....
- Ariolimacinae (a subfamily of Ariolimacidae
Ariolimacidae is a family of air-breathing land slugs, terrestrial pulmonate gastropod mollusks in the superfamily Arionoidea .- Subfamilies and genera:...
)
- Anadenidae
Anadenidae is a taxonomic family of air-breathing land slugs, terrestrial pulmonate gastropod mollusks in the superfamily Arionidae ....
- Trochomorphidae
Trochomorphidae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the clade Eupulmonata ....
- Helminthoglyptidae
The 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...
- Ferussaciidae
Ferussaciidae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Achatinoidea.This family has no subfamilies...
- Subulinidae
Subulinidae is a family of small tropical air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Achatinoidea.- Anatomy :...
- Euconulidae
Euconulidae is a taxonomic family of minute, air-breathing land snails, terrestrial pulmonate gastropod mollusks or micromollusks. This land snail family is closely allied to the Zonitidae, the glass snails.- Distribution :...
- Zonitidae
Zonitidae, common name the true glass snails, are a family of mostly rather small, air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Zonitoidea....
- Vitreinae (Vitreinae is a synonym for Pristilomatidae
Pristilomatidae is a taxonomic family of air-breathing land snails, terrestrial gastropod mollusks in the superfamily Gastrodontoidea.According to the 2005 taxonomy of the Gastropoda by Bouchet & Rocroi these snails belong to the "limacoid clade", and Vitreinae is a synonym for Pristilomatidae,...
)
- Gastrodontidae
Gastrodontidae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the clade Eupulmonata ....
Further reading
- Muratov I. V. (1999) "Analysis of the phylogenetic relationships and their systematic implications in the Limacoinei (=Zonitinia) infraorder (Gastropoda, Pulmonata, Geophila)". Ruthenica 9: 5-26.
External links