Pleurotomarioidea

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Pleurotomarioidea
Temporal range: Cambrian–Recent [1]
Entemnotrochus rumphii.jpg
A shell of Entemnotrochus rumphii
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Vetigastropoda
Superfamily: Pleurotomarioidea
Swainson, 1840
Families

See text

Pleurotomarioidea is a superfamily of small to large marine gastropods included in the order Pleurotomariida of the subclass Vetigastropoda. [2]

Contents

These are the slit shells, originally named Pleurotomariacea , in keeping with the convention for naming superfamilies at the time. This updated version of the name for the taxon is usually used by students of the living Mollusca. Paleontologists often still use the name Pleurotomariacea instead.

Evolutionary history

Forming the first evidence of crown-group gastropods when they appeared in the Upper Cambrian, the fossil record of the Pleurotomarioideans has no substantial gaps until today. The group took quite a hit at the Cretaceous–Paleogene boundary (K–T boundary), with only the Pleurotomariidae surviving the Cretaceous–Paleogene extinction event – and then only in deep waters. [3]

Living representatives of the group were first discovered in the mid-19th century, and their unusual mix of primitive and derived characters perplexed biologists. The researchers originally responded by re-working their ideas of how the gastropod lineage evolved, but with the introduction of cladistics, attempts are currently underway to fit them into a molluscan phylogeny. [3]

Taxonomy

2004 taxonomy

J. D. Stilwell et al. 2004 [4] put the Pleurotomarioidea in the order Archaeogastropoda which is included in the Prosobranchia.

1993 and 2005 taxonomy

The following families have been recognized in taxonomy by Tracey at al. (1993) [5] and in the taxonomy of Bouchet & Rocroi (2005):

Bouchet and Rocroi (2005) includes the Pleurotomarioidea in the Vetigastropoda, following Ponder and Lindberg (1997), but refers to the Vetigastropoda simply as a clade.

2008 taxonomy

P. J. Wagner 2008 [6] includes the superfamily Pleurotomarioidea, (ex Pleurotomariacea) in the suborder Pleurotomariina and superorder Vetigastropoda. This is an as yet (September 2010) unpublished opinion by Wagner. [6]

Related Research Articles

Neogastropoda Clade of sea snails

Neogastropoda is a clade of sea snails, both freshwater and marine gastropod molluscs.

Caenogastropoda Clade of sea snails

Caenogastropoda is a taxonomic clade, a large diverse group which are mostly sea snails and other marine gastropod mollusks, but also includes some freshwater snails and some land snails. The clade is the most diverse and ecologically successful of the gastropods.

Cocculinoidea Superfamily of gastropods

The Cocculinoidea is a superfamily of deepwater limpets, the only superfamily in the order Cocculinida , one of the main orders of gastropods according to the taxonomy as set up by. The clade Cocciliniformia used to be designated as a superorder.

Neomphaloidea Superfamily of gastropods

Neomphaloidea is a superfamily of deep-sea snails or limpets, marine gastropod mollusks. Neomphaloidea is the only superfamily in the order Neomphalida.

Trochoidea (superfamily) Superfamily of sea snails

Trochoidea is a superfamily of small to very large vetigastropod sea snails with gills and an operculum. Species within this superfamily have nacre as the inner shell layer. The families within this superfamily include the Trochidae, the top snails. This superfamily is the largest vetigastropodan superfamily, containing more than 2,000 species.

Pleurotomariidae Family of gastropods

Pleurotomariidae, common name the "slit snails", is a family of large marine gastropods in the superfamily Pleurotomarioidea of the subclass Vetigastropoda. This family is a very ancient lineage; there were numerous species in the geological past. The genus includes several hundred fossil forms, mostly Paleozoic. It is one of the oldest gastropod families, commencing in the Cambrian.

Lepetodrilidae Family of gastropods

Lepetodrilidae is a family of small, deep-sea sea snails, hydrothermal vent limpets, marine gastropod mollusks in the clade Vetigastropoda.

Pleurotomariacea

Pleurotomariacea is one of two names that are used for a taxonomic superfamily of sea snails that are an ancient lineage and are well represented in the fossil record. The name Pleurotomariacea is used by paleontologists, who, because they usually have only the hard parts of mollusks to study, often use a slightly different scheme of classification from that used by scientists who study living mollusks.

The taxonomy of the Gastropoda, as revised by Winston Ponder and David R. Lindberg in 1997, is an older taxonomy of the class Gastropoda, the class of molluscs consisting of all snails and slugs. The full name of the work in which this taxonomy was published is Towards a phylogeny of gastropod molluscs: an analysis using morphological characters.

Vetigastropoda Clade of sea snails

Vetigastropoda is a major taxonomic group of sea snails, marine gastropod mollusks that form a very ancient lineage. Taxonomically the Vetigastropoda are sometimes treated as an order, although they are treated as an unranked clade in Bouchet and Rocroi, 2005.

Neritimorpha Subclass of gastropods

Neritimorpha is a taxonomic grouping, an unranked clade of snails, gastropod mollusks. This grouping includes land snails, sea snails, some deepwater limpets, and also freshwater snails. This clade used to be known as the superorder Neritopsina.

Sigmurethra Informal group of gastropods

Sigmurethra is a taxonomic category of air-breathing land snails and slugs, terrestrial pulmonate gastropod molluscs. This is an informal group which includes the majority of land snails and slugs.

Cerithioidea Superfamily of gastropods

The Cerithioidea is a superfamily of marine, brackish water and freshwater gastropod containing more than 200 genera. The Cerithoidea are included in the clade Sorbeoconcha. The original name of this superfamily was Cerithiacea, in keeping with common superfamily endings at the time.

Ampullinidae Family of gastropods

Ampullinidae are a mostly extinct taxonomic family of deep-water sea snails, marine gastropod molluscs in the clade Caenogastropoda.

Ptenoglossa Suborder of gastropods

The Ptenoglossa is an informal taxonomic group of sea snails. This group was considered paraphyletic or polyphyletic by Ponder and Lindberg (1997) in their classification of gastropod molluscs.

Murchisonioidea is an extinct superfamily of small to large sea snails, marine gastropod mollusks in the clade Vetigastropoda.

Seguenzioidea Superfamily of gastropods

Seguenzioidea is a superfamily of minute to medium-sized sea snails, marine gastropod mollusks in the clade Vetigastropoda.

Euomphaloidea Extinct superfamily of gastropods

Euomphaloidea, originally Euomphalacea, is an extinct superfamily of marine molluscs that lived from the Early Ordovician to the Late Cretaceous, included in the Gastropoda but speculated as instead perhaps Monoplacophora.

This overview lists proposed changes in the taxonomy of gastropods at the family level and above since 2005, when the taxonomy of the Gastropoda by Bouchet & Rocroi (2005) was published. In other words, these are recent updates in the way various groups of snails and slugs are classified.

Trochida is an order of small to very large vetigastropod, Recent and extinct sea snails with gills and an operculum.

References

  1. ↑ Lindberg, edited by Winston F. Ponder, David R. (2008). Phylogeny and evolution of the Mollusca. Berkeley: University of California Press. ISBN   978-0-520-25092-5.CS1 maint: extra text: authors list (link)
  2. ↑ Bouchet, P.; Rocroi, J.-P. (2005). "Classification and Nomenclator of Gastropod Families". Malacologia. 47 (1–2).
  3. 1 2 Harasewych, M. (2002). "Pleurotomarioidean gastropods". Advances in Marine Biology. 42: 237–294. doi:10.1016/S0065-2881(02)42015-9. ISBN   9780120261420. ISSN   0065-2881. PMID   12094724.Cite journal requires |journal= (help)
  4. ↑ Classification of J. D. Stilwell et al. 2004 J. D. Stilwell, W. J. Zinsmeister, and A. E. Oleinik. 2004. Early Paleocene Mollusks of Antarctica: Systematics, Paleoecology and Paleobiogeographic Significance. Bulletins of American Paleontology 367
  5. ↑ Tracey, S.; J.A. Todd; D.H. Erwin (1993). Mollusca, Gastropoda; in : M.J. Benton (ed.) The Fossil Record, volume 2. London: Chapman & hall. pp. 131–167.
  6. 1 2 [ unreliable source? ] Classification of P. J. Wagner 2008 P. J. Wagner. 2008. Paleozoic Gastropod, Rostroconch, Helcionelloid and Tergomyan Database. http://paleodb.org/cgi-bin/bridge.pl?action=displayReference&reference_no=9042 (unpublished).
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