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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This cladogram is based on the following information. 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.

IMIS | Flanders Marine Institute

This page was last edited on 25 Julyat This system supersedes the system of Ponder and Lindberg familues 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. Views Read Edit View history. 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 ov 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.

The famjlies format used below makes clear which taxa are informal groups rather than clades:. Wikimedia Commons classitication media related to Template: 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.

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Further research will eventually resolve these questions.

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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. Both Linnaean taxa and nad are invalid if it turns out they are polyphyleticin nommenclator words if they consist of more than one lineage. Contains the Caenogastropoda of uncertain systematic position, the informal group Architaenioglossa and the clades Sorbeoconcha and Hypsogastropoda.

The system encompasses both living and extinct groups, as well as some fossils whose classification as gastropods is uncertain. 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.

In contrast, within hastropod 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. From Wikipedia, the free ad.

Classification and nomenclator of gastropod families.

The clade names are not indented, but their hierarchy is indicated by the size of the font used. Contains the clades LittorinimorphaNeogastropoda and the informal group Ptenoglossa. Biological classification schemes are not merely a convenience, they are an attempt to show the actual phylogeny the evolutionary relatedness within a group of organisms.

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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 It is worth bearing in mind however that this taxonomy is provisional: Systems of classification such as this one are primarily of value to malacologists people who study mollusks and other biologists.

Gastropod taxonomy Systems of animal taxonomy Malacological literature.

Bouchet and Rocroi use six main clades: The clades are unranked. Two other superfamilies are part of the clade Sigmurethra, but they are not in the limacoid clade:.

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

The paper setting out this taxonomy was published in the journal Malacologia. By using this site, you agree to the Terms of Use and Privacy Policy. Retrieved from ” https: 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 noenclator part of a lineage.