Pyramidelloidea
Encyclopedia
Pyramidelloidea is a superfamily
of mostly very small sea snail
s, marine
gastropod mollusks and micromollusk
s within the clade Panpulmonata
.
This is a voluminous taxon
: above the species level close to 400 named taxa are referred to this gastropod superfamily.
Pyramidelloidea has both fossil
and recent members. They live as ectoparasites on bivalve molluscs and polychaete
worms, and have a sharp, piercing stylet
instead of a radula
.
in the taxonomy of Bouchet & Rocroi
(2005).
Taxonomy of Bouchet & Rocroi, 2005:
.
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 mostly very small sea snail
Sea snail
Sea snail is a common name for those snails that normally live in saltwater, marine gastropod molluscs....
s, marine
Marine (ocean)
Marine is an umbrella term. As an adjective it is usually applicable to things relating to the sea or ocean, such as marine biology, marine ecology and marine geology...
gastropod mollusks and micromollusk
Micromollusk
A micromollusk is a descriptive term for a shelled mollusk which is extremely small, even at full adult size. The word is usually, but not exclusively, applied to marine mollusks, although in addition, numerous species of land snails and freshwater mollusks also reach adult size at very small...
s within the clade Panpulmonata
Panpulmonata
Panpulmonata is a taxonomic clade of snails and slugs in the clade Heterobranchia within the clade Euthyneura.Panpulmonata was established as a new taxon by Jörger et al...
.
This is a voluminous taxon
Taxon
|thumb|270px|[[African elephants]] form a widely-accepted taxon, the [[genus]] LoxodontaA taxon is a group of organisms, which a taxonomist adjudges to be a unit. Usually a taxon is given a name and a rank, although neither is a requirement...
: above the species level close to 400 named taxa are referred to this gastropod superfamily.
Pyramidelloidea has both fossil
Fossil
Fossils are the preserved remains or traces of animals , plants, and other organisms from the remote past...
and recent members. They live as ectoparasites on bivalve molluscs and polychaete
Polychaete
The Polychaeta or polychaetes are a class of annelid worms, generally marine. Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called chaetae, which are made of chitin. Indeed, polychaetes are sometimes referred to as bristle worms. More than 10,000...
worms, and have a sharp, piercing stylet
Stylet
A stylet is a hard, sharp, anatomical structure found in some invertebrates.For example, the word stylet or stomatostyle, is used for the primitive piercing mouthparts of some nematodes and some nemerteans...
instead of a radula
Radula
The radula is an anatomical structure that is used by molluscs for feeding, sometimes compared rather inaccurately to a tongue. It is a minutely toothed, chitinous ribbon, which is typically used for scraping or cutting food before the food enters the esophagus...
.
1999 taxonomy
Taxonomy by Schander, Van Aartsen & Corgan (1999):- Superfamily Pyramidelloidea Gray, 1840
- Family AmathinidaeAmathinidaeAmathinidae, is a taxonomic family mostly consisting of small and minute sea snails, marine heterobranch gastropod molluscs or micromolluscs in the superfamily Pyramidelloidea....
Ponder, 1987 - Family Ebalidae Warén, 1994 - synonym: Anisocyclidae van Aartsen, 1995
- Family Odostomiidae PelseneerPaul PelseneerJean Paul Louis Pelseneer was a Belgian malacologist, morphologist, ethologist and phylogenist....
, 1928- Subfamily OdostomiinaeOdostomiinaeOdostomiinae, Odostomia snails and their allies, is a taxonomic subfamily of minute parasitic sea snails. These are marine heterobranch gastropod mollusks, or micromollusks, in the family Pyramidellidae.-Taxonomy:...
Pelseneer, 1928 - Subfamily ChrysallidinaeChrysallidinaeChrysallidinae is a taxonomic group of very small sea snails in the family Pyramidellidae.- Taxonomy :Chrysallidinae has been one of eleven recognized subfamilies of the gastropod family Pyramidellidae...
Saurin, 1958 - Subfamily OdostomellinaeOdostomellinaeOdostomellini is a taxonomic tribe of minute sea snails, marine gastropod molluscs within the family Pyramidellidae the pyrams and their allies.- Taxonomy :...
Saurin, 1958 - Subfamily CyclostremellinaeCyclostremellinaeCyclostremellini is a tribe, a taxonomic grouping, of minute sea snails, marine gastropod mollusks or micromollusks, in the family Pyramidellidae, the pyrams.- Taxonomy :...
Moore, 1966
- Subfamily Odostomiinae
- Family PyramidellidaePyramidellidaePyramidellidae, common name the pyram family, or pyramid shells, is a voluminous taxonomic family of mostly small and minute ectoparasitic sea snails, marine heterobranch gastropod molluscs or micromolluscs....
J. E. Gray, 1840- Subfamily PyramidellinaePyramidellinaePyramidellinae is a taxonomic subfamily of minute sea snails, marine gastropod mollusks in the family Pyramidellidae, the pyrams and their allies.- Taxonomy :...
J.E. Gray, 1840 - Subfamily SayellinaeSayellinaeSayellini is a taxonomic tribe of minute ectoparasitic sea snails, marine gastropod molluscs, or micromollusks, in the very large family Pyramidellidae, the pyrams and their allies.- Taxonomy :...
Wise, 1996
- Subfamily Pyramidellinae
- Family Syrnolidae Saurin, 1958
- Subfamily Syrnolinae Saurin, 1958
- Subfamily TiberiinaeTiberiinaeTiberia is a genus of minute parasitic sea snails, marine gastropod molluscs in the family Pyramidellidae, the pyrams and their allies.- Taxonomy :...
Saurin, 1958
- Family Turbonillidae Bronn, 1849
- Subfamily TurbonillinaeTurbonillinaeTurbonillinae is a subfamily of mostly minute parasitic sea snails, marine gastropod molluscs in the family Pyramidellidae, the pyrams and their allies.-Taxonomy:...
Bronn, 1849 - Subfamily EulimellinaeEulimellinaeEulimellini is a tribe of minute sea snails, marine gastropod molluscs in the family Pyramidellidae, the pyrams and their allies.- Taxonomy :According to Schander, Van Aartsen & Corgan there are 17 genera in the Eulimellinae....
Saurin, 1958 - Subfamily CingulininaeCingulininaeCingulinini is a taxonomic tribe of very small sea snails, marine gastropod mollusks in the family Pyramidellidae.- Taxonomy :Cingulininae was first introduced by Saurin in 1959, and according to Schander, Van Aartsen & Corgan it comprises seven genera; Cingulina, Cinctigua, Coemansia,...
Saurin, 1959
- Subfamily Turbonillinae
- Family Amathinidae
2005 taxonomy
Pyramidelloidea has been classified within the informal group Lower HeterobranchiaLower Heterobranchia
Lower Heterobranchia, also known as the Allogastropoda, is a group of rather specialized, highly-evolved sea slugs and sea snails, within the clade Heterobranchia...
in the taxonomy of Bouchet & Rocroi
Taxonomy 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...
(2005).
Taxonomy of Bouchet & Rocroi, 2005:
- Superfamily Pyramidelloidea
- Family PyramidellidaePyramidellidaePyramidellidae, common name the pyram family, or pyramid shells, is a voluminous taxonomic family of mostly small and minute ectoparasitic sea snails, marine heterobranch gastropod molluscs or micromolluscs....
- Family AmathinidaeAmathinidaeAmathinidae, is a taxonomic family mostly consisting of small and minute sea snails, marine heterobranch gastropod molluscs or micromolluscs in the superfamily Pyramidelloidea....
- † Family HeteroneritidaeHeteroneritidae†Heteroneritidae is an extinct taxonomic family of sea snails, marine gastropod mollusks in the superfamilia Pyramidelloidea.- 2005 taxonomy :...
- Family MurchisonellidaeMurchisonellidaeMurchisonellidae is a taxonomic family of sea snails, marine opisthobranch gastropod mollusks in the superfamily Pyramidelloidea.- 1999 taxonomy :...
- Family Pyramidellidae
2010 taxonomy
Jörger et al. (2010) have redefined major groups within the Heterobranchia and they moved Pyramidelloidea to PanpulmonataPanpulmonata
Panpulmonata is a taxonomic clade of snails and slugs in the clade Heterobranchia within the clade Euthyneura.Panpulmonata was established as a new taxon by Jörger et al...
.
Pyramidelloidean genera of uncertain familial position
- Bidentata de Castellanos, 1982
- Calyptopolyptychia Gougerot, 1968
- Laeviselica Gougerot & Le Renard, 1977
- Lysacme Dall & Bartsch, 1904
- Oopyramis Thiele, 1930
- Sulcorinella Dall & Bartsch, 1904