''Uncancylus foncki'' is a species of small,

freshwater Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the term specifically excludes seawater and brackish water, it does include ...

, air-breathing

limpet Limpets are a group of aquatic snails that exhibit a conical shell shape (patelliform) and a strong, muscular foot. Limpets are members of the class Gastropoda, but are polyphyletic, meaning the various groups called "limpets" descended indep ...

, an aquatic

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 ...

mollusc 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 esti ...

in the family Planorbidae, the ram's horn snails and their allies.

Taxonomic notes

Some authors consider ''U. foncki'' a synonym of ''U. concentricus'' due to the similarity of their shell shapes.

Distribution

''U. foncki'' is endemic to Chile, where it occurs in lake Llanquihue and the Maullín river, which originates as the outflow of the lake, in the Llanquihue province. The type locality of the species is lake Llanquihue. ''U. foncki'' is known only from museum specimens. Attempts to locate the species in its type locality and the surrounding areas, so as to confirm its identity, have failed.

Description

''U. foncki'' has a high, wide shell with an elliptical aperture. The apex is acute but not sharp, as in ''U. concentricus'', located slightly to the right of the midline, dorsally flattened and bent to the right but not reaching the edge of the shell. The

protoconch A protoconch (meaning first or earliest or original shell) is an embryonic or larval shell which occurs in some classes of molluscs, e.g., the initial chamber of an ammonite or the larval shell of a gastropod. In older texts it is also called ...

exhibits irregularly arranged tenuous punctuations. The teleoconch exhibits fine growth lines, while radial lines and periostracal hair are absent.

References

{{Taxonbar, from=Q18356378 Planorbidae Molluscs of Chile Endemic fauna of Chile Gastropods described in 1866

Taxonomic notes

Distribution

Description

See also

References