List of ichthyosauromorph genera
Thislist of ichthyosauromorphsis a comprehensive listing of allgenerathat have ever been included in the cladeIchthyosauromorpha,excluding purely vernacular terms. The list includes all commonly accepted genera, but also genera that are now considered invalid, doubtful (nomen dubium), or were not formally published (nomen nudum), as well asjunior synonymsof more established names, and genera that are no longer considered ichthyopterygian. Non-ichthyosaur ichthyopterygians shall be noted as such. This list contains108genera.
Scope and terminology[edit]
There is no official, canonical list of ichthyosauromorph genera but one of the most thorough attempts can be found at the "Ichthyosauromorpha" section of Mikko Haaramo's Phylogeny Archive.[1]
Naming conventions and terminology follow theInternational Code of Zoological Nomenclature.Technical terms used include:
- Junior synonym:A name which describes the same taxon as a previously published name. If two or more genera are formally designated and thetype specimensare later assigned to the same genus, the first to be published (in chronological order) is the senior synonym, and all other instances are junior synonyms. Senior synonyms are generally used, except by special decision of the ICZN, but junior synonyms cannot be used again, even if deprecated. Junior synonymy is often subjective, unless the genera described were both based on the same type specimen.
- Nomen nudum(Latin for "naked name" ): A name that has appeared in print but has not yet been formally published by the standards of the ICZN.Nomina nuda(the plural form) are invalid, and are therefore not italicized as a proper generic name would be. If the name is later formally published, that name is no longer anomen nudumand will be italicized on this list. Often, the formally published name will differ from anynomina nudathat describe the same specimen. In this case, thesenomina nudawill be deleted from this list in favor of the published name.
- Preoccupied name:A name that is formally published, but which has already been used for another taxon. This second use is invalid (as are all subsequent uses) and the name must be replaced. As preoccupied names are not valid generic names, they will also go unitalicized on this list.
- Nomen dubium(Latin for "dubious name" ): A name describing a fossil with no unique diagnostic features. As this can be an extremely subjective and controversial designation, this term is not used on this list.
The list[edit]
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See also[edit]
- Ichthyosaur
- Ichthyopterygia
- List of dinosaurs
- List of mosasaurs
- List of plesiosaurs
- List of pterosaurs
- List of ichthyosaur type specimens
- Timeline of ichthyosaur research
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