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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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. Wikimedia Commons has media related to Template: Contains the subclades ElasmognathaOrthurethra and the informal group Sigmurethra.

Taxonomy of the Gastropoda (Bouchet & Rocroi, ) – Wikipedia

This proposed classification has tried to integrate the results of recent molecular work by classificstion 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.

Strong in Malacologia,61 1—2: In some parts of the taxonomy, instead of “clade”, Bouchet and Rocroi labelled groupings of taxa as a “group” or an “informal group”.

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 A clade must by definition contain only one lineage, and it was considered to gastropd the case that these “informal groups” may either contain more than one lineage, or only contain part of a lineage. Retrieved from ” https: Systems of classification such as this one are primarily of value to malacologists people who study mollusks and other biologists.

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From Wikipedia, the free encyclopedia. Gastropods are a taxonomic class of animals which consists of snails and slugs of every kind, from the land, famolies freshwaterand from saltwater. 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.

International Journal of Malacology. Further research will eventually resolve these questions.

In this taxonomy valid families are recognized. The clade names are not indented, but their hierarchy is indicated by the size of the font used.

Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005)

By using this site, you agree to the Terms of Use and Privacy Policy. This cladogram is based on the following information. In the past, the taxonomy of gastropods was largely based on the morphological characters of the taxa, such as the shell characteristics classificatiom the protoconch in shelled species, and the internal anatomyincluding the structure of the radula and details of the reproductive system.

PatellogastropodaVetigastropodaCocculiniformiaNeritimorphaCaenogastropodaand Heterobranchia. This system supersedes the system of Ponder and Lindberg from Classification of families snd subfamilies however is often not well resolved, and should be regarded as the best possible hypothesis.

Gastropod taxonomy Systems of animal taxonomy Familiee literature. 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.

They have adopted again the common additional ranks above superfamily: Two other superfamilies are part of the clade Sigmurethra, but they are not in the limacoid clade:. 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.

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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. A clearer sense of the hierarchy of the clades can be drawn from the list immediately above this one. Views Read Edit View history. This page was last edited on 25 Julyat The clades are unranked.

Philippe Bouchet

The gastropoc setting out this taxonomy was published in the journal Malacologia. The first three of these major clades have no nesting clades within them: Whenever monophyly a single ancestry has not yet been tested and confirmed, or where a traditional taxon familiies gastropods has already been discovered to be paraphyletic that it excludes some of its descendants the term “group” or “informal group” has been used.

Within the Caenogastropoda there is one extra clade. Here the information is displayed in the form of a cladogram an evolutionary tree of descent. The list format used below makes clear which taxa are informal groups rather than clades:. Thus a taxonomy clasdification as this one can be seen as an attempt to elucidate part of the tree of lifea phylogenetic tree.

Subsequent revisions by other authors have been made since the publication of this paper. Contains the clades LittorinimorphaNeogastropoda and the informal group Ptenoglossa.