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 . Page 2. Page 3. Page 4. Page 5.
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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 this taxonomy valid families are recognized. Both Linnaean taxa and clades are invalid if it turns out they are polyphyleticin other words if they consist of more than one lineage.
Strong in Malacologia,61 nomenclatkr From Wikipedia, the free encyclopedia. In contrast, within the Heterobranchia, for famjlies 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.
Biological classification schemes are not merely claesification convenience, they are an attempt to show the actual phylogeny the evolutionary relatedness within a group of organisms. International Journal of Malacology. This shift in emphasis has meant that the newer taxa and their hierarchy are subject to debate, a gastropdo that is not likely to be resolved soon.
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In the following, more detailed list, indentation is used only for the ranks of superfamily and family. Here claesification information is displayed in cclassification form of a cladogram an evolutionary tree of descent. Bouchet and Rocroi use six main clades: 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.
Contains the clades LittorinimorphaNeogastropoda and the informal group Ptenoglossa. Within the Caenogastropoda there is one extra clade.
The first three of these major clades have no nesting clades within them: Contains the Caenogastropoda of uncertain systematic position, the informal group Architaenioglossa and the clades Sorbeoconcha and Hypsogastropoda. The clades have been given names which are similar to, or in some cases the same as, traditional Linnaean names for taxa above the level of superfamily.
A full bibliographic reference gastropdo provided for each taxon, giving the name of the authority, the original publication, the date of that publication, the type genus for the familirs, its nomenclatural status, and its validity under the rules of the ICZN. 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 Two other superfamilies are part of the clade Sigmurethra, but they are not in the limacoid clade:.
The paper setting out this taxonomy was published in the journal Malacologia.
Classification and Nomenclator of Gastropod Families
The list format used below makes clear which taxa are informal groups rather than clades:. In the past, 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 structure of the radula and details of the reproductive system.
This system supersedes the system of Ponder and Lindberg from The clade names are not indented, but their hierarchy is indicated by the size of the font used.
This page was last edited on 25 Julyat Wikimedia Commons has media related to Template: Gastropod taxonomy Systems of animal taxonomy Malacological literature.
Contains the subclades ElasmognathaOrthurethra and the informal group Sigmurethra.
Whenever monophyly a single ancestry has not yet been tested and confirmed, or where a traditional taxon nomenclaotr gastropods has already been discovered to be paraphyletic that it excludes some of its descendants the term “group” or “informal group” has been used.
Subsequent revisions by other authors have been made since the publication of this paper. 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.
The clades are unranked. They have adopted again the common additional ranks above superfamily: Thus a taxonomy such as this one can be seen as an attempt to elucidate part of the tree of lifea phylogenetic tree. Superfamily names are standardized so that they all end in the suffix “-oidea”, also commonly used for superorders and subclasses, classificagion the “-acea” ending found especially gastropoc the older literature.
Gastropods are a taxonomic class of animals which consists of snails and slugs of every kind, from the land, from freshwaterand from saltwater.
Taxonomy of the Gastropoda (Bouchet & Rocroi, ) – Wikipedia
This cladogram is based on the following information. Views Read Edit View history. Classification of families into subfamilies however is often not gastrpod resolved, and should be regarded as the best possible hypothesis.
Systems of classifjcation such as this one are primarily of value to malacologists people who study mollusks and other biologists. A clearer sense of the hierarchy of the clades can be drawn from the list immediately above this one. PatellogastropodaVetigastropodaCocculiniformiaNeritimorphaCaenogastropodaand Heterobranchia.
In some parts of the taxonomy, instead of “clade”, Bouchet and Rocroi labelled groupings of taxa as a “group” or an “informal group”.