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Trochoidea (superfamily)
Encyclopedia
Trochoidea is a superfamily
of small to very large vetigastropod
sea snail
s with gill
s and an operculum
.
They have nacre
as the inner shell layer. The family within this superfamily include Trochidae
.
Note that this taxon is not the same as the pulmonate land snail genus which is spelled the same way: Trochoidea (genus)
.
):
Unassigned to a family :
Taxonomic rank
In biological classification, rank is the level in a taxonomic hierarchy. Examples of taxonomic ranks are species, genus, family, and class. Each rank subsumes under it a number of less general categories...
of small to very large vetigastropod
Vetigastropoda
Vetigastropoda is a major taxonomic group of sea snails, marine gastropod mollusks that form a very ancient lineage. Taxonomically Vetigastropoda are sometimes treated as an order although they are a clade in Bouchet and Rocroi, 2005....
sea snail
Sea snail
Sea snail is a common name for those snails that normally live in saltwater, marine gastropod molluscs....
s with gill
Gill
A gill is a respiratory organ found in many aquatic organisms that extracts dissolved oxygen from water, afterward excreting carbon dioxide. The gills of some species such as hermit crabs have adapted to allow respiration on land provided they are kept moist...
s and an operculum
Operculum (gastropod)
The operculum, meaning little lid, is a corneous or calcareous anatomical structure which exists in many groups of sea snails and freshwater snails, and also in a few groups of land snails...
.
They have nacre
Nacre
Nacre , also known as mother of pearl, is an organic-inorganic composite material produced by some mollusks as an inner shell layer; it is also what makes up pearls. It is very strong, resilient, and iridescent....
as the inner shell layer. The family within this superfamily include Trochidae
Trochidae
The Trochidae, common name top snails, are a taxonomic family of very small to large sea snails, marine gastropod molluscs in the clade Vetigastropoda ....
.
Note that this taxon is not the same as the pulmonate land snail genus which is spelled the same way: Trochoidea (genus)
Trochoidea (genus)
Trochoidea is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Hygromiidae.The name means "those that are shaped like a top"....
.
2005 taxonomy
This superfamily consists of nine following families (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005)
The taxonomy of the Gastropoda as it was revised by Philippe Bouchet and Jean-Pierre Rocroi is currently the most up-to-date overall system for classifying gastropod mollusks...
):
- TrochidaeTrochidaeThe Trochidae, common name top snails, are a taxonomic family of very small to large sea snails, marine gastropod molluscs in the clade Vetigastropoda ....
Rafinesque, 1815 - CalliostomatidaeCalliostomatidaeCalliostomatidae is a family of sea snails within the superfamily Trochoidea and the clade Vetigastropoda.- Description :The Calliostomatidae are unusually diverse. They are characterized by a stepped spire and a pointy aperture. They may possess or lack an umbilicus. The columella is sometimes...
ThieleJohannes ThieleJohannes Thiele, full name Karl Hermann Johannes Thiele was a German zoologist specialized in malacology. His Handbuch der systematischen Weichtierkunde is a standard work...
, 1924 (1847) - † ElasmonematidaeElasmonematidaeElasmonematidae is an extinct family of gastropods in the clade Vetigastropoda .This family has no subfamilies.- Genera :Genera within this family include:...
Knight, 1956 - † EucochlidaeEucochlidaeEucochlidae is an extinct family of fossil sea snails, marine gastropod mollusks in the superfamily Trochoidea .This family has no subfamilies....
Bandel, 2002 - † MicrodomatidaeMicrodomatidaeMicrodomatidae is an extinct family of fossil sea snails, marine gastropod mollusks in the superfamily Trochoidea .- Taxonomy :...
Wenz, 1938 - † ProconulidaeProconulidaeProconulidae is an extinct family of gastropods in the clade Vetigastropoda .This family has no subfamilies....
Cox, 1960 - SolariellidaeSolariellidaeSolariellidae is a family of small sea snails, marine gastropod mollusks in the superfamily Trochoidea...
PowellArthur William Baden PowellDr Arthur William Baden Powell CBE was a New Zealand malacologist, naturalist and palaeontologist, a major influence in the study and classification of New Zealand molluscs through much of the twentieth century. He was known to his friends and family by his third name, "Baden".Powell was born at...
, 1951 - synonym: Minoliinae Kuroda, Habe & Oyama, 1971 - † TychobraheidaeTychobraheidaeTychobraheidae is an extinct family of gastropods in the clade Vetigastropoda .This family has no subfamilies....
Horný, 1992 - † VelainellidaeVelainellidaeVelainellidae is a very small family of gastropods containing only the Eocene genus Velainella, named by Vasseur 1880 and found in France. Velainella has a long, narrow, straight twisted shell with a smooth lipped oval aperture...
Vasseur, 1880
2008 taxonomy
According to Williams et al. (2008) the taxonomy of Trochoidea looks this:- CalliostomatidaeCalliostomatidaeCalliostomatidae is a family of sea snails within the superfamily Trochoidea and the clade Vetigastropoda.- Description :The Calliostomatidae are unusually diverse. They are characterized by a stepped spire and a pointy aperture. They may possess or lack an umbilicus. The columella is sometimes...
- LiotiidaeLiotiidaeLiotiidae is a family of small sea snails, marine gastropod mollusks in the clade Vetigastropoda .- 2005 taxonomy :...
- SolariellidaeSolariellidaeSolariellidae is a family of small sea snails, marine gastropod mollusks in the superfamily Trochoidea...
- TrochidaeTrochidaeThe Trochidae, common name top snails, are a taxonomic family of very small to large sea snails, marine gastropod molluscs in the clade Vetigastropoda ....
- TurbinidaeTurbinidaeTurbinidae, the turban snails, are a family of small to large marine gastropods. Turbinidae have a strong, thick calcareous operculum readily distinguishing them from the somewhat similar Trochidae or top snails, which have a corneous operculum...
- † ElasmonematidaeElasmonematidaeElasmonematidae is an extinct family of gastropods in the clade Vetigastropoda .This family has no subfamilies.- Genera :Genera within this family include:...
- † EucochlidaeEucochlidaeEucochlidae is an extinct family of fossil sea snails, marine gastropod mollusks in the superfamily Trochoidea .This family has no subfamilies....
- † MicrodomatidaeMicrodomatidaeMicrodomatidae is an extinct family of fossil sea snails, marine gastropod mollusks in the superfamily Trochoidea .- Taxonomy :...
- † ProconulidaeProconulidaeProconulidae is an extinct family of gastropods in the clade Vetigastropoda .This family has no subfamilies....
- † TychobraheidaeTychobraheidaeTychobraheidae is an extinct family of gastropods in the clade Vetigastropoda .This family has no subfamilies....
- † VelainellidaeVelainellidaeVelainellidae is a very small family of gastropods containing only the Eocene genus Velainella, named by Vasseur 1880 and found in France. Velainella has a long, narrow, straight twisted shell with a smooth lipped oval aperture...
Unassigned to a family :
- MargarellaMargarellaMargarella is a genus of sea snails, marine gastropod molluscs in the family Trochidae, the top shells.-Species:Species within the genus Margarella include:* Margarella achilles * Margarella antarctica...
Thiele, 1893 - Margarella rosea belongs to Cantharidinae, but Margarella antarcticaMargarella antarcticaMargarella antarctica is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails....
belongs to CalliostomatidaeCalliostomatidaeCalliostomatidae is a family of sea snails within the superfamily Trochoidea and the clade Vetigastropoda.- Description :The Calliostomatidae are unusually diverse. They are characterized by a stepped spire and a pointy aperture. They may possess or lack an umbilicus. The columella is sometimes...
/Thysanodontinae as Carinastele antarctica.