''Leptothyra'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

sea snail Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the ...

marine Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military * ...

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 ...

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 e ...

s in the

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Colloniidae Colloniidae is a family of small sea snails with calcareous opercula, marine gastropod mollusks in the clade Vetigastropoda.MolluscaBase eds. (2020). MolluscaBase. Colloniidae Cossmann, 1917. Accessed through: World Register of Marine Species at ...

. This genus was previously placed in the family

Turbinidae Turbinidae, the turban snails, are a family of small to large marine gastropod molluscs in the superfamily Trochoidea.Bouchet, P. (2014). Turbinidae Rafinesque, 1815. Accessed through: World Register of Marine Species at http://www.marinespecie ...

. The name ''Leptothyra'' is generally attributed to Pease (1869), and the name "Leptothyra Pease, 1869" is usually treated as a valid name for small colloniines. Although ''Leptothyra'' is a junior objective synonym of ''Homalopoma'', the species usually treated as valid in that genus are provisionally listed in WoRMS under "Leptothyra sensu Pease, 1869", pending a taxonomic/nomenclatural reappraisal. ''Leptothyra'' J. G. Cooper, 1867 is now considered a junior objective synonym of the genus ''

Homalopoma ''Homalopoma'', common name the dwarf turbans, is a genus of mostly very small sea snails with a calcareous operculum (gastropod), operculum, Marine (ocean), marine gastropoda molluscs in the subfamily Colloniinae of the family (biology), family ...

'' Carpenter, 1864

Description

The small, solid shell has a turbinate or globose shape. The operculum is multispiral with a subcentral nucleus and concave in the centre outside. The main character distinguishing '' Collonia'' from ''Leptothyra'' seems to be the peculiar

peristome Peristome (from the Greek ''peri'', meaning 'around' or 'about', and ''stoma'', 'mouth') is an anatomical feature that surrounds an opening to an organ or structure. Some plants, fungi, and shelled gastropods have peristomes. In mosses In mosses, ...

of the former.

Species

Species within the genus ''Leptothyra'' include: * '' Leptothyra balnearii'' Pilsbry, H.A., 1920 * '' Leptothyra benthicola'' (Marshall, 1979) * '' Leptothyra candida'' Pease, 1861 * '' Leptothyra filifer'' (Deshayes, 1863) * '' Leptothyra grossa'' Feng, 1996 * '' Leptothyra kermadecensis'' (Marshall, 1979) * '' Leptothyra morini'' Viader, R., 1951 * '' Leptothyra nanina'' (Souverbie in Souverbie & Montrouzier, 1864) * '' Leptothyra rubens'' Melvill & Standen, 1903 ;Species brought into synonymy: * ''Leptothyra africana'' Bartsch, 1915: synonym of '' Cinysca spuria'' (Gould, 1861) * ''Leptothyra agulhasensis'' Thiele, 1925: synonym of '' Homalopoma agulhasense'' (Thiele, 1925) * ''Leptothyra albida'' Dall, 1881: synonym of '' Homalopoma albidum'' (Dall, 1881) * ''Leptothyra albocincta'' Turton, 1932: synonym of '' Tricolia striolata'' (Turton, 1932) * ''Leptothyra alfredensis'' Bartsch, 1915: synonym of '' Parviturbo alfredensis'' (Bartsch, 1915) * ''Leptothyra arenacea'' Pritchard & Gatliff, 1902: synonym of '' Charisma arenacea'' (Pritchard & Gatliff, 1902) * ''Leptothyra carminea'' Bartsch, 1915: synonym of ''Homalopoma quantillum carmineum'' (Bartsch, 1915) * ''Leptothyra coelata'' A. Adams, 1854: synonym of ''

Anadema macandrewii ''Anadema macandrewii'' is a species of sea snail, a marine gastropod mollusk in the family Colloniidae, Description The umbilicate, reddish yellow shell has an ovate-conoid, trochiform shape. It is thick, slightly elevated, and below subdep ...

'' Mörch, 1868 * ''Leptothyra costata'' Pease, 1869: synonym of ''Leptothyra verruca'' (Gould, 1845) * ''Leptothyra crassilirata'' Preston, 1909: synonym of '' Collonista crassilirata'' (Preston, 1909) * ''Leptothyra cunninghami'' E. A. Smith, 1881: synonym of '' Homalopoma cunninghami'' (E. A. Smith, 1881) * ''Leptothyra delecta'' E. A. Smith, 1899: synonym of '' Collonista delecta'' (E. A. Smith, 1899) * ''Leptothyra eroopolitana'' (Issel, 1869) : synonym of '' Collonista eroopolitana'' (Issel, 1869) * ''Leptothyra eucosmia'' Turton, 1932: synonym of '' Cinysca spuria'' (Gould, 1861) * ''Leptothyra fluctuata'' (Hutton, 1883): synonym of '' Argalista fluctuata'' (Hutton, 1883) * ''Leptothyra folini'' Pilsbry, 1889: synonym of '' Collonista purpurata'' (Deshayes, 1863) * ''Leptothyra gestroi'' Caramagna, 1888: synonym of ''

Yaronia gestroi ''Yaronia gestroi'' is a species of sea snail, a marine gastropod mollusk in the family Colloniidae.Bouchet, P. (2012). ''Yaronia gestroi'' (Caramagna, 1888). Accessed through: World Register of Marine Species at http://www.marinespecies.org ...

'' (Caramagna, 1888) * ''Leptothyra globuloides'' Dautzenberg & H. Fischer, 1896: synonym of '' Cantrainea globuloides'' (Dautzenberg & H. Fischer, 1896) * ''Leptothyra induta'' Watson, 1879: synonym of '' Homalopoma indutum'' (Watson, 1879) * ''Leptothyra induta'' var. ''tincta'' Dall, 1889: synonym of '' Homalopoma indutum'' (Watson, 1879) * ''Leptothyra induta'' var. ''insculpta'' Dall, 1889: synonym of '' Homalopoma indutum'' (Watson, 1879) * ''Leptothyra inepta'' (Gould, A.A., 1861): synonym of ''Neocollonia pilula'' (Dunker, 1860): synonym of '' Bothropoma pilula'' (Dunker, 1860) * ''Leptothyra innocens'' Thiele, 1912: synonym of '' Leptocollonia innocens'' (Thiele, 1912) * ''Leptothyra insculpta'' Dall, 1889: synonym of '' Homalopoma indutum'' (Watson, 1879) * ''Leptothyra laeta'' (Montrouzier in Souverbie & Montrouzier, 1863): synonym of '' Collonia granulosa'' Pease, 1868 * ''Leptothyra limata'' Dall, 1889: synonym of '' Homalopoma linnei'' (Dall, 1889) * ''Leptothyra linnei'' Dall, 1889: synonym of '' Homalopoma linnei'' (Dall, 1889) * ''Leptothyra paucicostata'' Dall, 1871: synonym of '' Homalopoma paucicostatum'' (Dall, 1871) * ''Leptothyra philipiana'' Dall, 1889: synonym of '' Cantrainea philipiana'' (Dall, 1889) * ''Leptothyra picta'' Marshall, 1979: synonym of '' Leptothyra kermadecensis'' Marshall, 1979 * ''Leptothyra quantilla'' (Gould, 1861): synonym of '' Homalopoma quantillum'' (Gould, 1861) * ''Leptothyra rotundata'' (G.B. Sowerby III, 1892): synonym of '' Homalopoma rotundatum'' (G.B. Sowerby III, 1892) * ''Leptothyra rubricincta'' (Mighels, 1845): synonym of '' Collonista rubricincta'' (Mighels, 1845) * ''Leptothyra sakaensis'' Yokoyama, 1925: synonym of '' Littorina brevicula'' (Philippi, 1844) * ''Leptothyra sanguinea'' Linnaeus, 1758: synonym of '' Homalopoma sanguineum'' (Linnaeus, 1758) * ''Leptothyra solida'' Preston, 1908: synonym of '' Collonista solida'' (Preston, 1908) * ''Leptothyra tincta'' Dall, 1889: synonym of '' Homalopoma indutum'' (Watson, 1879) * ''Leptothyra verruca'' (Gould, 1845): synonym of '' Collonista verruca'' (Gould, 1845)

Description

Species

References

Further reading