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 · Page [1]. Page 2. Page 3. Page 4. Page 5.

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This shift in emphasis has meant that the newer taxa and their hierarchy are subject to debate, a debate that is not likely to be resolved soon.

Gastropod taxonomy Systems of animal taxonomy Malacological literature. Bouchet and Rocroi use six main clades: A full bibliographic reference is provided for each taxon, giving the name of the authority, the original publication, the date of that publication, the anx genus for the taxon, its nomenclatural status, and its validity under the rules of the ICZN.

PatellogastropodaVetigastropodaCocculiniformiaNeritimorphaCaenogastropodaand Heterobranchia. In contrast, most of the previous overall taxonomic schemes for gastropods relied on lcassification features to classify these animals, and used taxon ranks such as ordersuperorder nomnclator suborder, which are typical of classifications that are still inspired by Linnaean taxonomy.

Since the publication of this taxonomic system invarious changes have been published by other authors, for more information see changes in the taxonomy classificatiln gastropods since Subsequent revisions by other authors have been made since the publication of this paper. A clearer sense of the hierarchy of the clades can be drawn from the list immediately above this one.

This system supersedes the system of Ponder and Lindberg from Retrieved from ” https: The list format used below makes clear which taxa are informal groups rather than clades:. Within the Caenogastropoda there is one extra clade. By using this site, you agree to the Terms of Use and Classificatoin Policy. Classification of families into subfamilies however is often not well resolved, and should be regarded as the best possible hypothesis.

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A clade must by definition contain only one lineage, and it was considered to be the case that these “informal groups” may either contain more than one lineage, or only contain part of a lineage. Systems of classification such as this one are primarily of value to malacologists people who gastropov mollusks and other biologists. Wikimedia Commons has media related to Template: Contains the Palaeozoic Neritomorpha of uncertain position and the clades Cyrtoneritimorpha and Cycloneritimorpha.

The taxonomy of the Gastropoda as it was revised in by Philippe Bouchet and Jean-Pierre Gastrood is a system for the scientific classification of gastropod mollusks.

Classification and Nomenclator of Gastropod Families – Ph Bouchet – Google Books

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 clasisfication excludes some of its descendants the term “group” or “informal group” has been used.

Strong in Malacologia,61 1—2: Views Read Edit View history. Further research will eventually resolve these questions. Both Linnaean taxa and clades are invalid if classsification turns out they are polyphyleticin other words if they consist of more than one lineage. The system encompasses both living and extinct groups, as well as some fossils whose classification as gastropods is uncertain.

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

The clade names are not indented, but their hierarchy is indicated by the size of the font used. From Wikipedia, the free encyclopedia. The first three of these major clades have no nesting clades within them: 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.

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Two other superfamilies are part of the clade Sigmurethra, but they are not in the limacoid clade:.

Contains the subclades ElasmognathaOrthurethra and the informal group Sigmurethra. 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.

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 Contains the Caenogastropoda of uncertain systematic position, the informal group Architaenioglossa and the clades Sorbeoconcha and Hypsogastropoda. In this taxonomy valid families are recognized.

Thus a taxonomy such as this one can be seen as an attempt to elucidate part of the tree of gastroppda phylogenetic tree. The paper setting out this taxonomy was published in the journal Malacologia.

Classification and Nomenclator of Gastropod Families (Paperback)

International Journal of Malacology. It is worth bearing in mind however that this taxonomy is provisional: Contains the clades LittorinimorphaNeogastropoda and the informal group Ptenoglossa.

The clades are unranked. In some parts of the taxonomy, instead of “clade”, Bouchet and Rocroi labelled groupings of taxa as a “group” or an “informal group”.