This list of ichthyosauromorphs is a comprehensive listing of all genera that have ever been included in the clade Ichthyosauromorpha, 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 as junior synonyms of more established names, and genera that are no longer considered ichthyopterygian. Non-ichthyosaur ichthyopterygians shall be noted as such. This list contains 108 genera.
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 the International 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 the type specimens are 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 a nomen nudum and will be italicized on this list. Often, the formally published name will differ from any nomina nuda that describe the same specimen. In this case, these nomina nuda will 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
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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
References
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- ^ a b c d Robin S. Cuthbertson; Anthony P. Russell & Jason S. Anderson (2013). "Cranial morphology and relationships of a new grippidian (Ichthyopterygia) from the Vega-Phroso Siltstone Member (Lower Triassic) of British Columbia, Canada". Journal of Vertebrate Paleontology. 33 (4): 831–847. Bibcode:2013JVPal..33..831C. doi:10.1080/02724634.2013.755989. S2CID 131501541.
- ^ Barrientos-Lara, Jair Israel; Alvarado-Ortega, Jesús (2021-11-01). "A new ophthalmosaurid (Ichthyosauria) from the Upper Kimmeridgian deposits of the La Casita Formation, near Gómez Farías, Coahuila, northern Mexico". Journal of South American Earth Sciences. 111: 103499. Bibcode:2021JSAES.11103499B. doi:10.1016/j.jsames.2021.103499. ISSN 0895-9811.
- ^ a b c d Aubrey Jane Roberts; Patrick Scott Druckenmiller; Glenn-Peter Sætre & Jørn Harald Hurum (2014). "A New Upper Jurassic Ophthalmosaurid Ichthyosaur from the Slottsmøya Member, Agardhfjellet Formation of Central Spitsbergen". PLOS ONE. 9 (8): e103152. Bibcode:2014PLoSO...9j3152R. doi:10.1371/journal.pone.0103152. PMC 4118863. PMID 25084533.
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- ^ a b c Shang Qing-Hua; Li Chun (2009). "On the occurrence of the ichthyosaur Shastasaurus in the Guanling Biota (Late Triassic), Guizhou, China" (PDF). Vertebrata PalAsiatica. 47 (3): 178–193.
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