List of prehistoric sea cucumbers
This article's factual accuracy is disputed. (May 2010) |
This list of prehistoric sea cucumbers is an attempt to create a comprehensive listing of all
junior synonyms
of more established names, and genera that are no longer considered sea cucumbers.
Naming conventions and terminology
Naming conventions and terminology follow the International Code of Zoological Nomenclature(ICZN). Technical terms used include:
- 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.
- Nomen oblitum (Latin for "forgotten name"): A name that has not been used in the scientific community for more than fifty years after its original proposal.
- 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
- List of prehistoric brittle stars
- List of prehistoric starfish
- List of crinoid genera
References
- Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (HOLOTHUROIDEA)". Bulletins of American Paleontology. 364: 560. Retrieved 2009-07-13.