Monadeniinae is a

taxonomic Taxonomy is the practice and science of categorization or classification. A taxonomy (or taxonomical classification) is a scheme of classification, especially a hierarchical classification, in which things are organized into groups or types. ...

subfamily In biological classification, a subfamily (Latin: ', plural ') is an auxiliary (intermediate) taxonomic rank, next below family but more inclusive than genus. Standard nomenclature rules end subfamily botanical names with "-oideae", and zoologi ...

of small to medium-sized air-breathing

land snail A land snail is any of the numerous species of snail that live on land, as opposed to the sea snails and freshwater snails. ''Land snail'' is the common name for terrestrial gastropod mollusks that have shells (those without shells are known as ...

terrestrial Terrestrial refers to things related to land or the planet Earth. Terrestrial may also refer to: * Terrestrial animal, an animal that lives on land opposed to living in water, or sometimes an animal that lives on or near the ground, as opposed to ...

pulmonate 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 includ ...

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

mollusk Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...

s in the family

Xanthonychidae Xanthonychidae is a family (biology), family of air-breathing land snails, terrestrial molluscs, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea. MolluscaBase eds. (2021). MolluscaBase. Xanthonychidae Strebel & Pfeffer, 187 ...

MolluscaBase eds. (2021). MolluscaBase. Monadenia Pilsbry, 1895. Accessed through: World Register of Marine Species at: http://marinespecies.org/aphia.php?p=taxdetails&id=995491 on 2021-02-25

Anatomy

This subfamily is defined by an absent

diverticulum In medicine or biology, a diverticulum is an outpouching of a hollow (or a fluid-filled) structure in the body. Depending upon which layers of the structure are involved, diverticula are described as being either true or false. In medicine, t ...

. The species have one dart apparatus, a stylophore (dart sac), one mucous gland, with a muscular duct that is inserted at base of the dart sac.

Genera

Genera within the subfamily Modaneiinae include: * ''

Monadenia ''Monadenia'' is a genus of air-breathing land snails in the subfamily Monadeniinae. MolluscaBase eds. (2021). MolluscaBase. Monadenia Pilsbry, 1895. Accessed through: World Register of Marine Species at: http://marinespecies.org/aphia.php?p=t ...

'' Pilsbry, 1895 - type genus

References

Xanthonychidae {{Xanthonychidae-stub