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. Both Linnaean taxa and clades are invalid if it turns out they are polyphyleticin other words if they consist of more than one lineage.

Here the information is displayed in the form of a cladogram an evolutionary tree of descent. Since the publication of this taxonomic system in classifcation, various proposals for changes have been published by other authors, for more information see changes in the taxonomy of gastropods since Superfamily names gastgopod 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.

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Classification and nomenclator of gastropod families.

International Journal of Malacology. Strong in Malacologia,61 1—2: The system encompasses both living and extinct groups, as well as some fossils whose classification as gastropods is uncertain.

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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.

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

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The first three of these major clades have no nesting clades within them: Two other superfamilies are part of the clade Sigmurethra, but they are not in the limacoid clade:. The clade names are not indented, but their hierarchy is indicated fastropod the size of the font used.

Contains the subclades ElasmognathaOrthurethra and the informal group Sigmurethra. The paper setting out this taxonomy was published in the journal Malacologia.

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. Subsequent revisions by other authors have been made since the publication of this paper. Bouchet and Classlfication use six main clades: 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 be regarded as the best possible hypothesis.

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Gastropods are a taxonomic class of animals which consists of snails and slugs of every kind, from the land, from freshwaterand from saltwater. PatellogastropodaVetigastropodaCocculiniformiaNeritimorphaCaenogastropodaand Heterobranchia.

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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 They have adopted again the common additional ranks above superfamily: 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.

From Wikipedia, the free encyclopedia. Gastropod taxonomy Systems nomenclatorr animal taxonomy Malacological literature. This cladogram is based on the following information. 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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Further research will eventually resolve these questions. Within the Caenogastropoda there is one extra clade.

The list format used below makes clear which taxa are informal groups rather than clades:. It is worth bearing in mind however that this taxonomy is provisional: Contains the clades LittorinimorphaNeogastropoda and the informal group Ptenoglossa. This system supersedes the system of Ponder and Lindberg from