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Leptothyra

Leptothyra is a genus of sea snails, marine gastropod mollusks in the family Colloniidae.

This genus was previously placed in the family Turbinidae.

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 <small>J. G. Cooper, 1867</small> is now considered a junior objective synonym of the genus Homalopoma <small>Carpenter, 1864</small>.

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 of the former.

Species

Species within the genus Leptothyra include:

Species brought into synonymy:
  • Leptothyra africana <small>Bartsch, 1915</small>: synonym of Cinysca spuria <small>(Gould, 1861)</small>
  • Leptothyra agulhasensis Thiele, 1925: synonym of Homalopoma agulhasense (Thiele, 1925)
  • Leptothyra albida <small>Dall, 1881</small>: synonym of Homalopoma albidum <small>(Dall, 1881)</small>
  • Leptothyra albocincta Turton, 1932: synonym of Tricolia striolata (Turton, 1932)
  • Leptothyra alfredensis <small>Bartsch, 1915</small>: synonym of Parviturbo alfredensis <small>(Bartsch, 1915)</small>
  • Leptothyra arenacea <small>Pritchard & Gatliff, 1902</small>: synonym of Charisma arenacea <small>(Pritchard & Gatliff, 1902)</small>
  • Leptothyra carminea <small>Bartsch, 1915</small>: synonym of Homalopoma quantillum carmineum <small>(Bartsch, 1915)</small>
  • Leptothyra coelata <small>A. Adams, 1854</small>: synonym of Anadema macandrewii <small>Mörch, 1868</small>
  • Leptothyra costata <small>Pease, 1869</small>: synonym of Leptothyra verruca <small>(Gould, 1845)</small>
  • Leptothyra crassilirata <small>Preston, 1909</small>: synonym of Collonista crassilirata <small>(Preston, 1909)</small>
  • Leptothyra cunninghami <small>E. A. Smith, 1881</small>: synonym of Homalopoma cunninghami <small>(E. A. Smith, 1881)</small>
  • Leptothyra delecta <small>E. A. Smith, 1899</small>: synonym of Collonista delecta <small>(E. A. Smith, 1899)</small>
  • Leptothyra eroopolitana <small>(Issel, 1869)</small> : synonym of Collonista eroopolitana <small>(Issel, 1869)</small>
  • Leptothyra eucosmia <small>Turton, 1932</small>: synonym of Cinysca spuria <small>(Gould, 1861)</small>
  • Leptothyra fluctuata <small>(Hutton, 1883)</small>: synonym of Argalista fluctuata <small>(Hutton, 1883)</small>
  • Leptothyra folini <small>Pilsbry, 1889</small>: synonym of Collonista purpurata <small>(Deshayes, 1863)</small>
  • Leptothyra gestroi <small>Caramagna, 1888</small>: synonym of Yaronia gestroi <small>(Caramagna, 1888)</small>
  • Leptothyra globuloides <small>Dautzenberg & H. Fischer, 1896</small>: synonym of Cantrainea globuloides <small>(Dautzenberg & H. Fischer, 1896)</small>
  • Leptothyra induta <small>Watson, 1879</small>: synonym of Homalopoma indutum <small>(Watson, 1879)</small>
  • Leptothyra induta var. tincta <small>Dall, 1889</small>: synonym of Homalopoma indutum <small>(Watson, 1879)</small>
  • Leptothyra induta var. insculpta <small>Dall, 1889</small>: synonym of Homalopoma indutum <small>(Watson, 1879)</small>
  • Leptothyra inepta <small>(Gould, A.A., 1861)</small>: synonym of Neocollonia pilula <small>(Dunker, 1860)</small>: synonym of Bothropoma pilula <small>(Dunker, 1860)</small>
  • Leptothyra innocens <small>Thiele, 1912</small>: synonym of Leptocollonia innocens <small>(Thiele, 1912)</small>
  • Leptothyra insculpta <small>Dall, 1889</small>: synonym of Homalopoma indutum <small>(Watson, 1879)</small>
  • Leptothyra laeta <small>(Montrouzier in Souverbie & Montrouzier, 1863)</small>: synonym of Collonia granulosa <small>Pease, 1868</small>
  • Leptothyra limata <small>Dall, 1889</small>: synonym of Homalopoma linnei <small>(Dall, 1889)</small>
  • Leptothyra linnei <small>Dall, 1889</small>: synonym of Homalopoma linnei <small>(Dall, 1889)</small>
  • Leptothyra paucicostata <small>Dall, 1871</small>: synonym of Homalopoma paucicostatum <small>(Dall, 1871)</small>
  • Leptothyra philipiana <small>Dall, 1889</small>: synonym of Cantrainea philipiana <small>(Dall, 1889)</small>
  • Leptothyra picta <small>Marshall, 1979</small>: synonym of Leptothyra kermadecensis <small>Marshall, 1979</small>
  • Leptothyra quantilla <small>(Gould, 1861)</small>: synonym of Homalopoma quantillum <small>(Gould, 1861)</small>
  • Leptothyra rotundata <small>(G.B. Sowerby III, 1892)</small>: synonym of Homalopoma rotundatum <small>(G.B. Sowerby III, 1892)</small>
  • Leptothyra rubricincta <small>(Mighels, 1845)</small>: synonym of Collonista rubricincta <small>(Mighels, 1845)</small>
  • Leptothyra sakaensis <small>Yokoyama, 1925</small>: synonym of Littorina brevicula <small>(Philippi, 1844)</small>
  • Leptothyra sanguinea <small>Linnaeus, 1758</small>: synonym of Homalopoma sanguineum <small>(Linnaeus, 1758)</small>
  • Leptothyra solida <small>Preston, 1908</small>: synonym of Collonista solida <small>(Preston, 1908)</small>
  • Leptothyra tincta <small>Dall, 1889</small>: synonym of Homalopoma indutum <small>(Watson, 1879)</small>
  • Leptothyra verruca <small>(Gould, 1845)</small>: synonym of Collonista verruca <small>(Gould, 1845)</small>

References

Further reading

  • Marshall B. A. (1979). The Trochidae and Turbinidae of the Kermadec Ridge (Mollusca: Gastropoda). New Zealand Journal of Zoology 6: 521-552
  • Huang S.-I, Fu I-F. & Poppe G.T. (2016). Taiwanese and Philippine Colloniidae. Nomenclatural remarks and the description of 17 new species (Gastropoda: Colloniidae). Visaya. 4(5): 4-42