my-server
← Wiki Redirected from Trichotropidae

Capulidae

The Capulidae, the cap snails or cap shells, are a taxonomic family of limpet-like sea snails, marine gastropod molluscs.

Capulidae is the only family in the superfamily Capuloidea. Capulidae is assigned to the paraphyletic order Littorinimorpha, but is more closely related to neogastropods than some other littorinimorphs as it is a member of the clade Latrogastropoda.

The name Trichotropidae was previously used for this family, but this name is invalid, as it is a junior synonym.

Characteristics

(Original description; described as Capulusidae) The foot is complicated on its anterior margin. The shell adheres to the animal by a circular muscle, leaving an opening in front for the issue of the head and the entrance to the branchial cavity. The gills form a single ridge across the roof. The aperture is in the form of an extended proboscis, with a deep groove above. The tentacula, which are two in number, have the eyes at their external base. The anus is on the right side of the branchial cavity.

Cup-shaped or bonnet-like, the shells of this family start with flat, tightly coiled initial whorls. From this beginning, they expand rapidly in a planospiral way, flaring out dramatically like a funnel.

The interior of the shell is porcelaneous. Some forms develop internal partitions or septa, a feature that makes them superficially resemble the Calyptraeidae (slipper limpets). Externally, the shell is covered by a thick periostracum that feels either felt-like or hairy. There is no operculum.

Species in this family are parasites, praying mostly on other molluscs. They steal the food from these animals with a long proboscis.

Genera

Genera within the family Capulidae include:

Subfamily Capulinae <small>J. Fleming, 1822</small>
Subfamily † Lysinae <small>Saul & Squires, 2008</small>
  • † Garzasia <small>Saul & Squires, 2008</small>
  • † Lysis <small>Gabb, 186</small>4
  • † Spirogalerus <small>H. J. Finlay & Marwick, 1937</small>
Genera brought into synonymy :
  • Actita <small>Fischer von Waldheim, 1823</small>: synonym of Capulus <small>Montfort, 1810</small>
  • Antitrichotropis <small>Powell, 1951</small>: synonym of Torellia <small>Jeffreys, 1867</small>
  • Ariadna <small>P. Fischer, 1864</small>: synonym of Ariadnaria <small>T. Habe, 1961</small> (junior homonym, junior homonym of Ariadna <small>Audouin, 1826</small> [Arachnida]; Ariadnaria is a replacement name)
  • Brocchia <small>Bronn, 1828</small>: synonym of Capulus <small>Montfort, 1810</small>
  • Capulonix <small>Iredale, 1929</small>: synonym of Capulus <small>Montfort, 1810</small>
  • Dolichosirius <small>Iredale, 1931</small>: synonym of Sirius <small>Hedley, 1900</small> (junior subjective synonym)
  • † Eosirius <small>P. A. Maxwell, 1966</small>: synonym of † Trichosirius (Eosirius) <small>P. A. Maxwell, 1966</small> represented as Trichosirius <small>H. J. Finlay, 1926</small>
  • Iphinoe <small> H. Adams & A. Adams, 1856 </small>: synonym of Neoiphinoe <small>Habe, 1978</small>
  • † Mesostoma <small>Deshayes, 1861</small>: synonym of † Cerithioderma <small>Conrad, 1860</small> (junior subjective synonym, invalid: junior homonym of Mesostoma <small>Ehrenberg, 1836</small>)
  • Neoconcha <small>E.A. Smith, 1907</small>: synonym of Torellia (Neoconcha) <small>E.A. Smith, 1907</small>
  • Opposirius <small>Iredale, 1931</small>: synonym of Sirius <small>Hedley, 1900</small>
  • Ovotropis <small>Egorov & Alexeyev, 1998</small>: synonym of Neoiphinoe <small>Habe, 1978</small>
  • Pileopsis <small>Lamarck, 1822</small>: synonym of Capulus <small>Montfort, 1810</small>
  • Opposirius <small>Iredale, 1931</small>: synonym of Sirius <small>Hedley, 1900</small>
  • Trichoconcha <small>E.A. Smith, 1907</small>: synonym of Torellia <small>Jeffreys, 1867</small>
  • † Tropidothais <small>L. R. Cox, 1925</small>: synonym of † Lysis <small>Gabb, 1864</small> (junior subjective synonym)

References

External links