''Alcadia'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

tropical The tropics are the regions of Earth surrounding the equator, where the sun may shine directly overhead. This contrasts with the temperate or polar regions of Earth, where the Sun can never be directly overhead. This is because of Earth's ax ...

and subtropical

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 molluscs, terrestrial gastropod mollusks that have gastropod shell, shel ...

s with an operculum,

terrestrial Terrestrial refers to things related to land or the planet Earth, as opposed to extraterrestrial. 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 o ...

gastropod Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and fro ...

mollusk Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The ...

s in the subfamily Helicininae of the family

Helicinidae Helicinidae is a family of small tropical land snails, terrestrial operculate gastropod mollusks in the superfamily Helicinoidea. Name These snails are not at all closely related to the air-breathing land snails, despite a superficial simila ...

. MolluscaBase eds. (2024). MolluscaBase. Alcadia J. E. Gray, 1840. Accessed through: World Register of Marine * At: https://www.marinespecies.org/aphia.php?p=taxdetails&id=996448 on 2024-07-24

Description

''Alcadia'' differs from the Helicininae in having a slit in front of the

aperture In optics, the aperture of an optical system (including a system consisting of a single lens) is the hole or opening that primarily limits light propagated through the system. More specifically, the entrance pupil as the front side image o ...

, into which is fitted the tooth-like process of the operculum.

Species

Species within the genus ''Alcadia'' include: * '' Alcadia affinis'' C.B. Adams, 1846 * ''

Alcadia alta ''Alcadia alta'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description (Original description) This species is small and pellucidid. The height of the shell attains 5.3 mm. Distributi ...

'' (G. B. Sowerby II, 1866) * ''

Alcadia aurantia ''Alcadia aurantia'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description (Original description) The shell is rather depressed globular and ovate, with a purplish-white coloration. It f ...

'' (J. E. Gray, 1824) * ''

Alcadia bahamensis ''Alcadia bahamensis'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description The shell is high, its greatest diameter . The shell is depressed, somewhat thin, and finely striated with s ...

'' (L. Pfeiffer, 1862) * '' Alcadia bermudezi'' Aguayo & Jaume, 1957"Mollusca"
. Diversidad Biológica Cubana, accessed 23 March 2011. * ''

Alcadia binneyana ''Alcadia binneyana'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description The shell is high, its greatest diameter . Distribution This species occurs in Haiti, Hispaniola Hispani ...

'' (L. Pfeiffer, 1866) * ''

Alcadia blandiana ''Alcadia blandiana'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description (Original description in Latin) The shell is conical and obtusely keeled, with a reddish-brown, uniform colorat ...

'' Weinland, 1880 * ''

Alcadia boeckeleri ''Alcadia boeckeleri'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Distribution This species occurs in Costa Rica Costa Rica, officially the Republic of Costa Rica, is a country in C ...

'' (Richling, 2001) * ''

Alcadia brownii ''Alcadia brownii'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. ;Subspecies: * ''Alcadia brownii brownii'' (J. E. Gray, 1824) * ''Alcadia brownii labiosa'' (C. B. Adams, 1851) * ''Alcadia ...

'' (J. E. Gray, 1824) * ''

Alcadia bullula ''Alcadia bullula'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Distribution This species occurs in Colombia Colombia, officially the Republic of Colombia, is a country primarily l ...

'' Hausdorf, 2006 * '' Alcadia camagueyana'' Aguayo & Jaume, 1957 * ''

Alcadia charmosyne ''Alcadia charmosyne'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Distribution This species occurs in Dominican Republic The Dominican Republic is a country located on the island o ...

'' (Pilsbry, 1933) * ''

Alcadia chocoensis ''Alcadia chocoensis'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description The height of the shell varies between 3.1 mm and 4.1 mm; its diameter between 3.3 mm and 4.2&n ...

'' Roosen, 2023 * ''

Alcadia citrinolabris ''Alcadia citrinolabris'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description The height of the shell attains 4 mm, its greatest diameter 6 mm. (Original description) The shell is brow ...

'' (C. B. Adams, 1849) * ''

Alcadia concinna ''Alcadia'' is a genus of tropical and subtropical land snails with an operculum, terrestrial gastropod mollusks in the subfamily Helicininae of the family Helicinidae. MolluscaBase eds. (2024). MolluscaBase. Alcadia J. E. Gray, 1840. Accessed ...

'' (Gundlach in Pfeiffer, 1857) * ''

Alcadia consanguinea ''Alcadia consanguinea'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description (Original description) The shell is subglobose and moderately thick, characterized by a dark brownish-red co ...

'' (C. B. Adams, 1851) * ''

Alcadia conuloides ''Alcadia conuloides'' is a species of tropical land snail with an operculum, a terrestrial gastropod mollusk in the family Helicinidae. Taxonomy Robert John Lechmere Guppy (1895) considered this species synonymous with the taxon '' Schramm ...

'' (Guppy, 1868) * ''

Alcadia decussata ''Alcadia decussata'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Distribution This species occurs in Colombia Colombia, officially the Republic of Colombia, is a country primarily ...

'' Hausdorf, 2006 * ''

Alcadia delmonteana ''Alcadia delmonteana'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Distribution This species occurs in Dominican Republic The Dominican Republic is a country located on the island ...

'' Pilsbry, 1933 * '' Alcadia dissimulans'' (Poey, 1858) * ''

Alcadia dubiosa ''Alcadia dubiosa'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description The greatest diameter of the shell attains 7.6 mm. (Original description) The shell is globose-conic and shining ...

'' (C. B. Adams, 1850) * ''

Alcadia erythrozona ''Alcadia erythrozona'' is a species of an Operculum (gastropod), operculate land snail, terrestrial animal, terrestrial gastropod mollusk in the family Helicinidae. Distribution This species occurs in Jamaica. References * External links M ...

'' Dean, 1931 * '' Alcadia euglypta'' Clench & Aguayo, 1950 * '' Alcadia exigua'' (L. Pfeiffer, 1849) * ''

Alcadia gonavensis ''Alcadia gonavensis'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description (Original description in Latin) The shell is globosely depressed, somewhat solid, and slightly shiny, with fin ...

'' Weinland, 1880 * '' Alcadia gonostoma'' (Gundlach in Poey, 1858) * ''

Alcadia guadaloupensis ''Alcadia guadaloupensis'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description (Original description in Latin) The shell is flattened and somewhat angular, showing fine concentric stri ...

'' (G. B. Sowerby II, 1842) * ''

Alcadia haitensis ''Alcadia haitensis'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description The height of the shell attains 6 mm, its greatest diameter 8.5 mm. (Original description in Latin) The imperf ...

'' (Maltzan, 1888) * ''

Alcadia hirsuta ''Alcadia hirsuta'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description (Original description) The shell is depressed globose and rather thin, exhibiting a brownish-red color with a hir ...

'' (C. B. Adams, 1851) * '' Alcadia hispida'' (Pfeiffer, 1839) * ''

Alcadia hjalmarsoni ''Alcadia hjalmarsoni'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description The height of the shell attains 5 mm, its greatest diameter 8 mm. (Original description in Latin) The conoid ...

'' (L. Pfeiffer, 1856) * ''

Alcadia hojarasca ''Alcadia hojarasca'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Distribution This species occurs in Costa Rica Costa Rica, officially the Republic of Costa Rica, is a country in Ce ...

'' (Richling, 2001) * ''

Alcadia hollandi ''Alcadia hollandi'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description (Original description) This species is similar to Alcadia brownii, but the shell is significantly smaller and th ...

'' (C. B. Adams, 1849) * ''

Alcadia iheringi ''Alcadia iheringi'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description The height of the shell attains 3.1 mm, its greatest diameter 3.8 mm. (Original description in German ...

'' A. J. Wagner, 1911 * '' Alcadia incrustata'' (Gundlach in Pfeiffer, 1859) * ''

Alcadia intusplicata ''Alcadia intusplicata'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Subspecies There are two subspecies recognized in this species: * ''Alcadia intusplicata intusplicata'' (L. Pfeiffer, ...

'' (L. Pfeiffer, 1851) * ''

Alcadia jamaicensis ''Alcadia jamaicensis'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description (Original description in Latin) The shell is very similar to ''Alcadia aurantia'' (J. E. Gray, 1824), but is ...

'' (G. B. Sowerby II, 1842) * ''

Alcadia kuehni ''Alcadia kuehni'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description The height of the shell attains 4 mm, its greatest diameter 5.7 mm. (Original description in Latin) The glob ...

'' (L. Pfeiffer, 1872) * ''

Alcadia lewisi ''Alcadia lewisi'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description The height of the shell attains 3 mm, its greatest diameter 4.5 mm. Distribution This species occurs in the Caym ...

'' Pilsbry, 1942 * ''

Alcadia macilenta ''Alcadia macilenta'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description (Original description) The shell is rather small and thin, subdiscoidal, and flattened beneath, with a pale bro ...

'' (C. B. Adams, 1849) * ''

Alcadia major ''Alcadia major'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. ;Subspecies: * ''Alcadia major gossei'' (L. Pfeiffer, 1849) * ''Alcadia major major'' (J. E. Gray, 1824) Description (Origina ...

'' (J. E. Gray, 1824) * ''

Alcadia mammilla ''Alcadia mammilla'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description The height of the shell attains , its greatest diameter . (Original description in Latin) The conical shell is ...

'' Weinland, 1862 * ''

Alcadia maxima ''Alcadia maxima'' is a species of tropical and subtropical land snails with an operculum, terrestrial gastropod mollusks in the family Helicinidae Helicinidae is a family of small tropical land snails, terrestrial operculate gastropod moll ...

'' G.B. Sowerby II, 1842 * ''

Alcadia mcleani ''Alcadia mcleani'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Distribution This species occurs in the Bahamas The Bahamas, officially the Commonwealth of The Bahamas, is an archip ...

'' Clench, 1937 * ''

Alcadia megastoma ''Alcadia megastoma'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description (Original description) The shell is globose-conic, smooth, and shiny, with a rather thick yellowish-brown exter ...

'' (C. B. Adams, 1849) * ''

Alcadia microstoma ''Alcadia microstoma'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description (Original description) The shell is globose-conic and moderately thickened, with a brown coloration that shad ...

'' (C. B. Adams, 1851) * '' Alcadia minima'' (d’Orbigny, 1842) * ''

Alcadia moussoniana ''Alcadia moussoniana'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Distribution This species occurs in the Bahamas The Bahamas, officially the Commonwealth of The Bahamas, is an ar ...

'' (L. Pfeiffer, 1866) * '' Alcadia neebiana'' (Pfeiffer, 1862) * '' Alcadia nitida'' (Pfeiffer, 1839) * ''

Alcadia nobilis ''Alcadia nobilis'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description (Original description) The shell is depressed globose-conic, thick, and solid. It is white beneath and at the end ...

'' (C. B. Adams, 1851) * ''

Alcadia nodulosa ''Alcadia nodulosa'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Distribution This species occurs in Colombia Colombia, officially the Republic of Colombia, is a country primarily ...

'' Hausdorf, 2006 * ''

Alcadia novogranadensis ''Alcadia novogranadensis'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Distribution This species occurs in Colombia Colombia, officially the Republic of Colombia, is a country pri ...

'' Hausdorf, 2006 * '' Alcadia nuda'' (Arango in Pfeiffer, 1866) * ''

Alcadia pellucida ''Alcadia pellucida'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description (Original description in Latin) The shell is similar to ''Helicina zephyrina'' Duclos, 1833, but with the colum ...

'' (G. B. Sowerby II, 1842) * ''

Alcadia pompholyx ''Alcadia pompholyx'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Distribution This species occurs in Dominican Republic The Dominican Republic is a country located on the island of ...

'' (Pilsbry, 1933) * ''

Alcadia pusilla ''Alcadia pusilla'' is a species of an Operculum (gastropod), operculate land snail, terrestrial animal, terrestrial gastropod mollusk in the family Helicinidae. Description The shell of adult snails has a depressed globular shape. It has a h ...

'' (C. B. Adams, 1850) * ''

Alcadia rhamphostyla ''Alcadia rhamphostyla'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description The height of the shell attains 12 mm, its greatest diameter 15.5 mm. (Original description in Latin) The ...

'' (L. Pfeiffer, 1857) * '' Alcadia rotunda'' (d’Orbigny, 1842) * '' Alcadia rufa'' (L. Pfeiffer, 1857) * '' Alcadia schrammi'' (Crosse, 1872) * ''

Alcadia sericea ''Alcadia sericea'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description The height of the shell attains , its greatest diameter . (Original description in Latin) The globular-trochifo ...

'' (Drouët, 1859) * ''

Alcadia solitaria ''Alcadia solitaria'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description The height of the shell attains , its greatest diameter . (Original description in Latin) The depressed shell ...

'' (C. B. Adams, 1845) * ''

Alcadia spectabilis ''Alcadia spectabilis'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description The height of the shell attains , its greatest diameter . (Original description in Latin) The conical-globose ...

'' (Pfeiffer, 1858) * ''

Alcadia succinea ''Alcadia succinea'' is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae. Description The height of the shell attains 5.5 mm, its greatest diameter 8 mm. (Original description in Latin) The orbic ...

'' (L. Pfeiffer, 1850) * '' Alcadia velutina'' (Poey, 1858)

Synonyms of Alcadia

* ''Alcadia (Alcadia)'' J. E. Gray, 1840 · alternative representation * ''Alcadia (Bellula)'' A. J. Wagner, 1908 junior subjective synonym * ''Alcadia (Eualcadia)'' A. J. Wagner, 1907 junior subjective synonym * ''Alcadia (Glyptalcadia)'' Boss & Jacobson, 1973 · alternative representation * ''Alcadia (Hispida)'' A. J. Wagner, 1907 junior homonym (invalid; not Bate, 1868, ''Penisoltia'' is a replacement name) * ''Alcadia (Hjalmarsona)'' H. B. Baker, 1940 · alternative representation * ''Alcadia (Idesa)'' H. Adams & A. Adams, 1856 alternative representation Adams H. & Adams A. (1856). ''The genera of Recent Mollusca, Helicinidae'' 2: 300-309, 3: pl. 87. London. ''Idesa'' is on the page 304. * ''Alcadia (Incrustata)'' A. J. Wagner, 1907 junior homonym * ''Alcadia (Intusplicata)'' A. J. Wagner, 1907 alternative representation * ''Alcadia (Leialcadia)'' A. J. Wagner, 1907 (junior synonym) * ''Alcadia (Mamilla)'' A. J. Wagner, 1907 alternative representation * ''Alcadia (Megastoma)'' A. J. Wagner, 1907 junior homonym (invalid; not Rafinesque, 1814) * ''Alcadia (Microalcadia)'' Richling, 2004 alternative representation * ''Alcadia (Palliata)'' A. J. Wagner, 1907 alternative representation * ''Alcadia (Penisoltia)'' H. B. Baker, 1954 alternative representation * ''Alcadia (Weinlandella)'' H. B. Baker, 1954 unavailable name (unnecessary replacement name for ''Mamilla'') * ''Eualcadia'' A. J. Wagner, 1907 (junior synonym) * ''Helicina (Alcadia)'' J. E. Gray, 1840 (unaccepted rank) * ''Helicina (Idesa)'' H. Adams & A. Adams, 1856 superseded combination * ''Helicina (Isoltia)'' Guppy, 1895 junior subjective synonym * ''Helicina (Schrammia)'' Guppy, 1895 superseded combination * ''Hispida'' A. J. Wagner, 1907 (invalid; not Bate, 1868, ''Penisoltia'' is a replacement name) * ''Idesa'' H. Adams & A. Adams, 1856 · * ''Isoltia'' Guppy, 1895 (junior synonym) * ''Leialcadia'' A. J. Wagner, 1907 · * ''Schrammia'' Guppy, 1895 junior subjective synonym

Synonyms

* ''Alcadia appuni'' (E. von Martens, 1873): synonym of ''Helicina tamsiana appuni'' E. von Martens, 1873 (superseded combination) * ''Alcadia balteata'' Aguayo & Jaume, 1954: synonym of '' Alcadia minima'' (A. d'Orbigny, 1842) (junior synonym) * ''Alcadia capax'' L. Pfeiffer, 1857: synonym of ''Alcadia minima'' (A. d'Orbigny, 1842) (junior synonym) * ''Alcadia ciliata'' (Poey, 1852): synonym of ''

Emoda ciliata ''Emoda'' is a genus of land snails with an operculum, terrestrial gastropod mollusks in the family Helicinidae. Species Species within the genus ''Emoda'' include: * '' Emoda bayamensis'' (Poey, 1854)

'' (Poey, 1852) ( superseded combination) * ''Alcadia colombiana'' (R. A. Philippi, 1847): synonym of ''

Helicina columbiana ''Helicina'' is a genus of tropical and subtropical land snails with an operculum, terrestrial gastropod mollusks. This is the type genus of its family (Helicinidae) and subfamily (Helicinae), as well as the superfamily Helicinoidea. This radi ...

'' R. A. Philippi, 1847 (superseded combination) * Alcadia deppeana (E. von Martens, 1863): synonym of Helicina zephyrina deppeana E. von Martens, 1863 (superseded rank and combination) * ''Alcadia dysoni'' (L. Pfeiffer, 1849): synonym of '' Helicina dysoni'' L. Pfeiffer, 1849 (unaccepted combination) * ''Alcadia gundlachi'' L. Pfeiffer, 1854: synonym of ''Alcadia (Penisoltia) minima'' (A. d'Orbigny, 1842) represented as ''Alcadia minima'' (A. d'Orbigny, 1842) * ''Alcadia quinonesi'' Clench & Aguayo, 1950: synonym of ''Alcadia minima'' (A. d'Orbigny, 1842) (junior synonym) * ''Alcadia quiñonesi'' Clench & Aguayo, 1950: synonym of ''Alcadia minima'' (A. d'Orbigny, 1842) (misspelling - incorrect original spelling) * ''Alcadia striata'' (Lamarck, 1822): synonym of ''

Helicina striata ''Helicina'' is a genus of tropical and subtropical land snails with an operculum, terrestrial gastropod mollusks. This is the type genus of its family (Helicinidae) and subfamily (Helicinae), as well as the superfamily Helicinoidea. This radi ...

'' Lamarck, 1822 (superseded combination) * ''Alcadia subfusca'' (Menke, 1828): synonym of ''Alcadia striata'' (Lamarck, 1822): synonym of ''

'' Lamarck, 1822 (junior synonym) * ''Alcadia tamsiana'' (L. Pfeiffer, 1851): synonym of '' Helicina tamsiana'' L. Pfeiffer, 1851 (superseded combination)

References

* Bank, R. A. (2017). Classification of the Recent terrestrial Gastropoda of the World. Last update: July 16th, 2017.

External links

* * * * * * * Taxa named by John Edward Gray Long stubs with short prose {{Helicinidae-stub