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 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. International Journal of Malacology. The clades have been given names which are similar to, or in some cases the same as, traditional Linnaean names for wnd above the level of superfamily.
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.
It is worth bearing in mind however that this taxonomy is provisional: A clearer sense of the hierarchy of the clades can be drawn from the list immediately above this one. The first three of these major clades have no nesting clades within them: This page was last edited on 25 Julyat 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.
In some parts of the taxonomy, instead of “clade”, Bouchet and Rocroi labelled groupings of taxa as a “group” or an “informal group”.
Details – Classification and Nomenclator of Gastropod Families – Biodiversity Heritage Library
The clade names are not indented, but their hierarchy is indicated by the size of the font used. 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.
Thus a taxonomy such as this one can be seen as an attempt to elucidate part of the tree of lifea phylogenetic tree. Retrieved from ” https: 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.
In this taxonomy valid families are recognized. Classification of families into subfamilies however is often not well resolved, gastorpod should be regarded as the best possible hypothesis. Systems of classification such as this one are primarily of value to malacologists people who study mollusks and other biologists. Bouchet and Rocroi use six main clades: Wikimedia Commons has media related to Template: This system supersedes the system of Ponder and Lindberg from In contrast, within the Heterobranchia, for some of nomenclafor nudibranch groups clasxification are six separate clades above nomeclator level of superfamily, and in the case of most of the land snailsthere are four clades above the level of superfamily.
The clades are unranked.
Views Read Edit View history. Contains the Caenogastropoda of uncertain systematic position, the informal group Architaenioglossa and the clades Sorbeoconcha and Hypsogastropoda.
This cladogram is based on the following information. Gastropod taxonomy Systems of animal taxonomy Malacological literature. 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.
Contains the clades LittorinimorphaNeogastropoda and the informal group Ptenoglossa. PatellogastropodaVetigastropodaCocculiniformiaNeritimorphaCaenogastropodaand Heterobranchia.
Here the information is displayed in the form of a cladogram an evolutionary tree of descent. In the following, more detailed list, indentation is used only for the ranks of superfamily and family. 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.
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.
Within the Caenogastropoda there is one extra clade. Two other superfamilies are part of the clade Sigmurethra, but they are not in the limacoid clade:. Both Linnaean taxa and clades are invalid if it turns out they are polyphyleticin other words if they consist of more than one lineage.
Contains the subclades ElasmognathaOrthurethra and the informal group Sigmurethra. Contains the Palaeozoic Neritomorpha of uncertain position and the clades Cyrtoneritimorpha and Cycloneritimorpha. The paper setting out this taxonomy was published in the journal Malacologia. Since the publication of classificayion taxonomic system invarious changes have been published by other authors, for more information see changes in the taxonomy of gastropods since Nomenclatod have adopted again the common additional ranks above superfamily: