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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Here the information is displayed in the form of a cladogram an evolutionary tree of descent. In the nomenclahor, the taxonomy of gastropods was largely based on the morphological characters of the taxa, such as the shell characteristics including the protoconch in shelled species, and the internal anatomyincluding the gzstropod of the radula and details of the reproductive system.

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.

Retrieved from ” https: The system encompasses both living and extinct groups, as well as some fossils whose classification as gastropods is uncertain. Further research will eventually resolve these questions. Subsequent revisions by other authors have been made since the publication of this paper.

IMIS | Flanders Marine Institute

The first three of these major clades have no nesting clades within them: In some parts of the taxonomy, instead of “clade”, Bouchet and Rocroi labelled groupings of taxa as a “group” or an “informal group”. Bouchet and Rocroi use six main clades: Biological classification anx 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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The paper setting out this taxonomy was published in the journal Malacologia. PatellogastropodaVetigastropodaCocculiniformiaNeritimorphaCaenogastropodaand Heterobranchia.

This page was famjlies edited on 25 Julyat International Journal of Malacology. Superfamily names are standardized so if they all end in the suffix “-oidea”, also commonly used for superorders and subclasses, replacing the “-acea” ending found especially in the older literature.

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 famolies of its descendants the term “group” or “informal group” has been used.

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 Both Linnaean taxa and clades are invalid if it turns out they are polyphyleticin other words if they consist of more than one lineage. Gastropods are a taxonomic class of animals which consists of snails and slugs of every kind, from the land, from freshwaterand from saltwater.

Classification and Nomenclator of Gastropod Families (Paperback)

A clearer sense of the hierarchy of the clades can be drawn from the list immediately above this one. This shift in emphasis has meant that the newer taxa and their hierarchy gastropof subject to debate, a debate that is not likely to be resolved soon.

In the following, more detailed list, indentation is used only for the ranks of superfamily and family. Contains the Caenogastropoda of uncertain systematic position, the informal group Architaenioglossa and the clades Sorbeoconcha and Hypsogastropoda.

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It is worth bearing in mind however that this taxonomy is provisional: 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.

Contains the Palaeozoic Neritomorpha of uncertain position and the clades Cyrtoneritimorpha and Cycloneritimorpha. From Wikipedia, the free encyclopedia. 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.

Contains the clades LittorinimorphaNeogastropoda and the informal group Ptenoglossa.

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.

Systems of classification such as this one are primarily of value to malacologists people who study mollusks and other biologists.

Wikimedia Commons has media related to Template: This system supersedes the system of Ponder and Lindberg from Two other superfamilies are part of the clade Sigmurethra, but they are not in the limacoid clade:. 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.

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