CLASSIFICATION AND NOMENCLATOR OF GASTROPOD FAMILIES PDF

Article: Classification and Nomenclator of Gastropod Families. Add this to your Mendeley library Report an error. Summary; Details; MODS; BibTeX; RIS. About names at the rank of subtribe, tribe, subfamily, family and superfamily have been proposed for Recent and fossil gastropods. All these names are. Classification and Nomenclator of Gastropod Families. Philippe Bouchet, Jean- Pierre Rocroi ยท Page [1]. Page 2. Page 3. Page 4. Page 5.

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Since the publication of this taxonomic system invarious proposals for changes have been published by other authors, for more information see changes in the taxonomy of gastropods since PatellogastropodaVetigastropodaCocculiniformiaNeritimorphaCaenogastropodaand Heterobranchia. Bouchet and Rocroi use six main clades: This proposed classification has tried to integrate the results of recent molecular work by using unranked clades for taxa below the traditional rank of class class Gastropoda but above the rank of superfamily replacing the ranks subclass, superorder, order, and suborderwhile still using the traditional Linnaean ranks for superfamilies and all taxa below the rank of superfamily i.

Two other superfamilies are part of the clade Sigmurethra, but they are not in the limacoid clade:. Gastropods are a taxonomic class of animals which consists of snails and slugs of every kind, from the land, from freshwaterand from saltwater. Systems of classification such as this one are primarily of value to malacologists people who study mollusks and other biologists.

Further research will eventually resolve these questions.

A clearer sense of the hierarchy of the clades can be drawn from the list immediately above this one. Classification of families into subfamilies however is often not well resolved, and should clasisfication regarded as the best possible hypothesis. By using this site, you agree to the Terms of Use and Privacy Policy.

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Classification and nomenclator of gastropod families.

A full bibliographic reference is provided for each taxon, giving the name of the authority, the original publication, the date of that publication, the type genus for the taxon, its nomenclatural status, and its validity under the rules of the ICZN.

The nomencltaor have been given names which are similar to, or in some cases the same as, traditional Linnaean names for taxa above the level of superfamily.

Since the publication of gastropoe taxonomic system invarious changes have been nonenclator by other authors, for more information see changes in the taxonomy of gastropods since This cladogram is based on the following information.

Superfamily names are standardized so that they all end in the suffix “-oidea”, also commonly used for superorders and subclasses, replacing the “-acea” ending found especially in the older literature. It is worth bearing in mind however that this taxonomy is provisional: Whenever monophyly a single ancestry has not yet been tested and confirmed, or where a traditional taxon of gastropods has already been discovered to be paraphyletic that it excludes some of its descendants the term “group” or “informal group” has been used.

Thus a taxonomy such as this one can be seen as an attempt to elucidate part of the tree of lifea phylogenetic tree. Views Read Edit View history.

Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005)

The clades are unranked. This system supersedes the system of Ponder and Lindberg from Both Linnaean taxa and clades are invalid if it turns out they are polyphyleticin other words if they consist of more than one lineage.

From Wikipedia, the free encyclopedia. In the following, more detailed list, indentation is used only for the ranks of superfamily and family. In some parts of the taxonomy, instead of “clade”, Bouchet and Rocroi labelled groupings of taxa as a “group” or an “informal group”. This shift in emphasis has meant that the newer taxa and their hierarchy are subject to debate, a debate that is not nomenclatlr to be resolved soon.

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The system encompasses both living and extinct groups, as well as some fossils whose classification as gastropods is uncertain. The first three of these major clades have no nesting clades within them: In this taxonomy valid families are recognized. The taxonomy of the Gastropoda as it was revised in by Philippe Bouchet and Jean-Pierre Rocroi is a system for the scientific classification of gastropod mollusks. Contains the subclades ElasmognathaOrthurethra and the informal group Sigmurethra.

Here the information is displayed in the form of a cladogram an evolutionary tree of descent.

Classification and nomenclator of gastropod families.

In contrast, within the Heterobranchia, for some of the nudibranch groups there are six separate clades above the level of superfamily, and in the case of most of the land snailsthere are four clades above the level of superfamily. The clade names are not indented, but their hierarchy is indicated by the size of the font used.

This page was last edited on 25 Julyat They have adopted again the common additional ranks above superfamily: In contrast, most of the previous overall taxonomic schemes for gastropods relied on morphological features to classify these animals, and used taxon ranks such as ordersuperorder and suborder, which are typical of classifications that are still inspired by Linnaean taxonomy.

Contains the clades LittorinimorphaNeogastropoda and the informal group Ptenoglossa. Wikimedia Commons classfiication media related to Template:

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