Metoptomatidae

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Metoptomatidae
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda or Monoplacophora
Family:Metoptomatidae
Wenz, 1938 [1]
Genera

See text

Metoptomatidae is an extinct family of fossil mollusks from the Paleozoic era. These mollusks are either (Gastropoda or Monoplacophora).

Family is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy; it is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as being the "walnut family".

The PaleozoicEra is the earliest of three geologic eras of the Phanerozoic Eon. It is the longest of the Phanerozoic eras, lasting from 541 to 251.902 million years ago, and is subdivided into six geologic periods : the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian. The Paleozoic comes after the Neoproterozoic Era of the Proterozoic Eon and is followed by the Mesozoic Era.

Gastropoda class of molluscs

The gastropods, more commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca, called Gastropoda. This class comprises snails and slugs from saltwater, from freshwater, and from the land. There are many thousands of species of sea snails and slugs, as well as freshwater snails, freshwater limpets, and land snails and slugs.

Contents

Taxonomy

The taxonomy of the Gastropoda by Bouchet & Rocroi, 2005 [2] categorizes Metoptomatidae within the Paleozoic molluscs of uncertain systematic position. This family is unassigned to superfamily. This family has no subfamilies.

The taxonomy of the Gastropoda as it was revised in 2005 by Philippe Bouchet and Jean-Pierre Rocroi is a system for the scientific classification of gastropod mollusks. The paper setting out this taxonomy was published in the journal Malacologia. The system encompasses both living and extinct groups, as well as some fossils whose classification as gastropods is uncertain.

Genera

Genera in the family Metoptomatidae include:

Type genus term in zoological nomenclature (also non-officially in botanical nomenclature)

In biological classification, especially zoology, the type genus is the genus which defines a biological family and the root of the family name.

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Neritimorpha subclass of molluscs

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.

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

Pseudolivoidea is a taxonomic superfamily of sea snails, marine gastropod mollusks in the clade Neogastropoda.

Subulitoidea is an extinct superfamily of fossil sea snails, marine gastropod mollusks in the clade Caenogastropoda.

Khairkhaniidae is an extinct family of Paleozoic fossil molluscs of uncertain position. They are thought to belong to either the Gastropoda or Monoplacophora. They possess planispiral coiled shells with a columnar microstructure.

Patelliconidae is an extinct family of Paleozoic fossil molluscs. It is not known whether these were Gastropoda or Monoplacophora.

Protoconchoididae is an extinct family of Paleozoic molluscs of uncertain taxonomic position, i.e. they were either.

†Archaeopragidae is an extinct family of paleozoic molluscs of uncertain position.

Pelagiellidae family of molluscs (fossil)

Pelagiellidae is an extinct family of Paleozoic fossil marine molluscs.

Tropidodiscidae is an extinct family of Paleozoic fossil molluscs with isostrophically coiled shells. They are of uncertain position taxonomically, in other words it is not known whether they were s.

Euphemitidae is an extinct family of Paleozoic fossil molluscs of uncertain position. They have isostrophically coiled shells and may be either Gastropoda sea (snail)s, or Monoplacophora.

Pterothecidae is an extinct family of Paleozoic molluscs of uncertain position, either Gastropoda or Monoplacophora, with isostrophically coiled shells.

Omphalotrochidae is an extinct taxonomic family of Paleozoic molluscs (gastropods?) with anisostrophically coiled shells of uncertain position (Gastropoda?).

Omphalocirridae is an extinct family of Paleozoic molluscs (gastropods?) with anisostrophically coiled shells of uncertain position (Gastropoda?).

Helicotomidae is an extinct family of Paleozoic molluscs (gastropods?) with anisostrophically coiled shells of uncertain position (Gastropoda?).

Isospiridae is an extinct family of fossil sea snails, Paleozoic gastropod mollusks.

Planitrochidae is an extinct family of fossil sea snails, Paleozoic gastropod mollusks.

Scoliostomatidae is an extinct family of Paleozoic fossil sea snails, marine gastropod mollusks.

Sinuopeidae is an extinct family of fossil sea snails, Paleozoic gastropod mollusks.

References

  1. ↑ Wenz (March) 1938. Handbuch der Paläozoologie, 6(1): 38, 43, 92.
  2. ↑ Bouchet P. & Rocroi J.-P. (Ed.); Frýda J., Hausdorf B., Ponder W., Valdes A. & Warén A. 2005. Classification and nomenclator of gastropod families. Malacologia: International Journal of Malacology, 47(1-2). ConchBooks: Hackenheim, Germany. ISBN   3-925919-72-4. ISSN 0076-2997. 397 pp. http://www.vliz.be/Vmdcdata/imis2/ref.php?refid=78278


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