''Allogona'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

of air-breathing land snails,

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 gastropod

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 es ...

s in the family

Polygyridae Polygyridae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea. MolluscaBase eds. (2021). MolluscaBase. Polygyridae Pilsbry, 1895. Accessed through: World Register of Marine Specie ...

. The shell of this genus is not distinguishable from the shell of ''Triodopsis'', but the male reproductive anatomy is unusual, and is characteristic for the genus. (The genus name, from Greek, means "different genitalia".)Pilsbry, Henry A. (1940). Land Mollusca of North America (North of Mexico). Acad. Nat. Sci. Philadelphia, Monograph 3, vol. 1(2): 875-892.

Species and subspecies

Species and subspecies within the genus ''Allogona'' include: * ''

Allogona profunda ''Allogona profunda'', commonly known as the broad-banded forestsnail, is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Polygyridae. The broad-banded forestsnail is roughly 15 millimeters in heig ...

'' * ''

Allogona profunda strontiana ''Allogona'' is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Polygyridae. The shell of this genus is not distinguishable from the shell of ''Triodopsis'', but the male reproductive anatomy is u ...

'' * ''

Allogona ptychophora ''Allogona ptychophora'' is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Polygyridae Polygyridae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the supe ...

'' * ''

Allogona ptychophora solida ''Allogona'' is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Polygyridae. The shell of this genus is not distinguishable from the shell of ''Triodopsis'', but the male reproductive anatomy is u ...

'' * ''

Allogona townsendiana ''Allogona townsendiana'', common name the Oregon forestsnail, is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Polygyridae. Distribution and conservation status This snail species lives in Bri ...

'' The classic treatment of this group by Pilsbry divides the genus into two subgenera: ''Allogona'' ''s.s.'' for '' A. profunda'' and its subspecies, and '' Dysmedoma'' for the other members of the taxon.

References

Polygyridae {{Polygyridae-stub