# Alcadia

Alcadia is a genus of tropical and subtropical land snails with an operculum, terrestrial gastropod mollusks in the subfamily Helicininae of the family Helicinidae.

## Description

Alcadia differs from the Helicininae in having a slit in front of the aperture, 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 (G. B. Sowerby II, 1866)
* Alcadia aurantia (J. E. Gray, 1824)
* Alcadia bahamensis (L. Pfeiffer, 1862)
* Alcadia bermudezi Aguayo & Jaume, 1957
* Alcadia binneyana (L. Pfeiffer, 1866)
* Alcadia blandiana Weinland, 1880
* Alcadia boeckeleri (Richling, 2001)
* Alcadia brownii (J. E. Gray, 1824)
* Alcadia bullula Hausdorf, 2006
* Alcadia camagueyana Aguayo & Jaume, 1957
* Alcadia charmosyne (Pilsbry, 1933)
* Alcadia chocoensis Roosen, 2023
* Alcadia citrinolabris (C. B. Adams, 1849)
* Alcadia concinna (Gundlach in Pfeiffer, 1857)
* Alcadia consanguinea (C. B. Adams, 1851)
* Alcadia conuloides (Guppy, 1868)
* Alcadia decussata Hausdorf, 2006
* Alcadia delmonteana Pilsbry, 1933
* Alcadia dissimulans (Poey, 1858)
* Alcadia dubiosa (C. B. Adams, 1850)
* Alcadia erythrozona Dean, 1931
* Alcadia euglypta Clench & Aguayo, 1950
* Alcadia exigua (L. Pfeiffer, 1849)
* Alcadia gonavensis Weinland, 1880
* Alcadia gonostoma (Gundlach in Poey, 1858)
* Alcadia guadaloupensis (G. B. Sowerby II, 1842)
* Alcadia haitensis (Maltzan, 1888)
* Alcadia hirsuta (C. B. Adams, 1851)
* Alcadia hispida (Pfeiffer, 1839)
* Alcadia hjalmarsoni (L. Pfeiffer, 1856)
* Alcadia hojarasca (Richling, 2001)
* Alcadia hollandi (C. B. Adams, 1849)
* Alcadia iheringi A. J. Wagner, 1911
* Alcadia incrustata (Gundlach in Pfeiffer, 1859)
* Alcadia intusplicata (L. Pfeiffer, 1851)
* Alcadia jamaicensis (G. B. Sowerby II, 1842)
* Alcadia kuehni (L. Pfeiffer, 1872)
* Alcadia lewisi Pilsbry, 1942
* Alcadia macilenta (C. B. Adams, 1849)
* Alcadia major (J. E. Gray, 1824)
* Alcadia mammilla Weinland, 1862
* Alcadia maxima G.B. Sowerby II, 1842
* Alcadia mcleani Clench, 1937
* Alcadia megastoma (C. B. Adams, 1849)
* Alcadia microstoma (C. B. Adams, 1851)
* Alcadia minima (d’Orbigny, 1842)
* Alcadia moussoniana (L. Pfeiffer, 1866)
* Alcadia neebiana (Pfeiffer, 1862)
* Alcadia nitida (Pfeiffer, 1839)
* Alcadia nobilis (C. B. Adams, 1851)
* Alcadia nodulosa Hausdorf, 2006
* Alcadia novogranadensis Hausdorf, 2006
* Alcadia nuda (Arango in Pfeiffer, 1866)
* Alcadia pellucida (G. B. Sowerby II, 1842)
* Alcadia pompholyx (Pilsbry, 1933)
* Alcadia pusilla (C. B. Adams, 1850)
* Alcadia rhamphostyla (L. Pfeiffer, 1857)
* Alcadia rotunda (d’Orbigny, 1842)
* Alcadia rufa (L. Pfeiffer, 1857)
* Alcadia schrammi (Crosse, 1872)
* Alcadia sericea (Drouët, 1859)
* Alcadia solitaria (C. B. Adams, 1845)
* Alcadia spectabilis (Pfeiffer, 1858)
* Alcadia succinea (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
* 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 (Poey, 1852) ( superseded combination)
* Alcadia colombiana (R. A. Philippi, 1847): synonym of Helicina columbiana 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 Lamarck, 1822 (superseded combination)
* Alcadia subfusca (Menke, 1828): synonym of Alcadia striata (Lamarck, 1822): synonym of Helicina striata Lamarck, 1822 (junior synonym)
* Alcadia tamsiana (L. Pfeiffer, 1851): synonym of Helicina tamsiana L. Pfeiffer, 1851 (superseded combination)