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 . 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. Gastropod taxonomy Systems of animal taxonomy Malacological literature. 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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Whenever monophyly a classlfication 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. In the following, more detailed list, indentation is used only for the ranks of superfamily and family.
Contains the clades LittorinimorphaNeogastropoda and the informal group Ptenoglossa. Contains the subclades ElasmognathaOrthurethra and the informal group Sigmurethra.
Biological classification schemes are not merely a convenience, they are an attempt to show the actual classlfication the evolutionary relatedness within a group of organisms.
Classification and Nomenclator of Gastropod Families (Paperback)
The clades are unranked. 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. 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.
Details – Classification and Nomenclator of Gastropod Families – Biodiversity Heritage Library
A full bibliographic reference is provided for each taxon, giving the name of the authority, the original publication, the date of that publication, the gaastropod genus for the taxon, its nomenclatural status, and its validity under the rules of the ICZN.
The first three of these major clades have no nesting clades within them: This proposed classification has tried to integrate the results nomenxlator 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 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.
International Journal of Malacology. Wikimedia Commons has media related to Template: PatellogastropodaVetigastropodaCocculiniformiaNeritimorphaCaenogastropodaand Heterobranchia.
Classification and Nomenclator of Gastropod Families – Ph Bouchet – Google Books
The clade names are not indented, but their hierarchy is indicated by the size of the font used. Bouchet and Rocroi use six main clades: Since the publication of this taxonomic system invarious proposals for changes have classificatino 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.
The paper setting out this taxonomy was published in the journal Malacologia. In this taxonomy valid families are recognized. Classificatioon in Malacologia,61 1—2: Classification of families into subfamilies faamilies is often not well resolved, and should be regarded as the best possible hypothesis.
Subsequent revisions by other authors have been made since the publication of this paper. The list format used below makes clear which taxa are informal groups rather than clades:. This page was last edited on 25 Julyat Views Read Edit View history. Contains the Palaeozoic Neritomorpha of uncertain position and the clades Cyrtoneritimorpha and Cycloneritimorpha. Clazsification the information is displayed in the form of a cladogram an evolutionary tree of descent.