# Opisthosiphon

Opisthosiphon is a genus of land snails with an operculum, terrestrial gastropod mollusks in the family Annulariidae.

## Description

The genus Opisthosiphon has been described by American malacologist William Healey Dall in 1905. Dall's type description reads as follows:
   Genus nov. OPISTHOSIPHON, Dall.
   Type: Chondropoma Bahamense, Sh. (Figs. 1, 2.) Bahamas.
   Shell with the habit of Chondropoma dentatum, Say, but in the adult with a tubular projection behind and distinct from the outer lip and the posterior angle of the aperture, but communicating with the
   lumen of the whorl. operculum as in Rhytidopoma, but thinner.

## Species

The following species are recognised in the genus Opisthosiphon:
* Opisthosiphon acklinsensis Bartsch, 1946
* Opisthosiphon aguilerianum (Arango, 1876)
* Opisthosiphon alleni Bartsch, 1946
* Opisthosiphon andrewsi Welch, 1929
* Opisthosiphon androsensis Pilsbry, 1930
* Opisthosiphon apertum de la Torre & Henderson, 1921
* Opisthosiphon bacillum de la Torre & Bartsch, 1941
* Opisthosiphon bahamense (L. Pfeiffer, 1865)
* Opisthosiphon banaoense de la Torre & J. B. Henderson, 1921
* Opisthosiphon bermudezi de la Torre & Bartsch, 1941
* Opisthosiphon berryi W. F. Clapp, 1919
* Opisthosiphon bioscai de la Torre & Henderson, 1921
* Opisthosiphon caguanense de la Torre & Bartsch, 1941
* Opisthosiphon caroli Aguayo, 1932
* Opisthosiphon claudens de la Torre & Bartsch, 1941
* Opisthosiphon conicus Aguayo & Sánchez Roig, 1949
* Opisthosiphon cucullatum de la Torre & Bartsch, 1941
* Opisthosiphon cunaguae Welch, 1929
* Opisthosiphon detectum de la Torre & Henderson, 1921
* Opisthosiphon deviatum de la Torre & Bartsch, 1941
* Opisthosiphon echinatum (L. Pfeiffer, 1857)
* Opisthosiphon evanidum de la Torre & Henderson, 1921
* Opisthosiphon excurrens (L. Pfeiffer & Gundlach, 1860)
* Opisthosiphon greenfieldi de la Torre & Bartsch, 1941
* Opisthosiphon guanajaense de la Torre & Bartsch, 1941
* Opisthosiphon insulanum de la Torre & Bartsch, 1941
* Opisthosiphon judasense de la Torre & Henderson, 1921
* Opisthosiphon lamellicostatum de la Torre & Henderson, 1921
* Opisthosiphon lamellosum de la Torre & Bartsch, 1941
* Opisthosiphon litorale de la Torre & Bartsch, 1941
* Opisthosiphon lucayanorus Clench, 1963
* Opisthosiphon manatiense de la Torre & Bartsch, 1941
* Opisthosiphon maynardi Vanatta, 1920
* Opisthosiphon mayori Bartsch, 1946
* Opisthosiphon millsi Bartsch, 1946
* Opisthosiphon moreletianum (Petit de la Saussaye, 1850)
* Opisthosiphon nicholasi Bartsch, 1946
* Opisthosiphon obtectum de la Torre & Henderson, 1921
* Opisthosiphon obturatum de la Torre & J. B. Henderson, 1921
* Opisthosiphon opisthocoele (de la Torre & Bartsch, 1941)
* Opisthosiphon palmeri de la Torre & Bartsch, 1941
* Opisthosiphon paradoxum (de la Torre & J. B. Henderson, 1921)
* Opisthosiphon paredonense de la Torre & Henderson, 1921
* Opisthosiphon plateroense de la Torre & Bartsch, 1941
* Opisthosiphon plicatum de la Torre & Bartsch, 1941
* Opisthosiphon poeyi de la Torre & Bartsch, 1941
* Opisthosiphon prominulum de la Torre & Bartsch, 1941
* Opisthosiphon protractum de la Torre & Henderson, 1921
* Opisthosiphon pupoides (Morelet, 1849)
* Opisthosiphon quesadai Aguayo, 1932
* Opisthosiphon quinti de la Torre & Bartsch, 1941
* Opisthosiphon sainzi Aguayo, 1934
* Opisthosiphon salustii de la Torre & Henderson, 1921
* Opisthosiphon sanchezi de la Torre & Bartsch, 1941
* Opisthosiphon sculptum (L. Pfeiffer, 1857)
* Opisthosiphon simpsoni Bartsch, 1946
* Opisthosiphon simulans (de la Torre & Bartsch, 1941)
* Opisthosiphon sosai de la Torre & Bartsch, 1941
* Opisthosiphon subobtectum de la Torre & Bartsch, 1941
* Opisthosiphon subobturatum de la Torre & J. B. Henderson, 1921
* Opisthosiphon tersum de la Torre & Henderson, 1921
* Opisthosiphon thesaurus Watters, 2019
* Opisthosiphon torrei Welch, 1929
* Opisthosiphon turiguanoense de la Torre & Bartsch, 1941