List of chitinozoan genera

A Chitinozoan (Sphaerochitina cf. diezae) from the late Silurian Burgsvik beds, Gotland, Sweden, prepared by dissolution in HF acid.

This list of chitinozoan genera is an attempt to create a comprehensive listing of all genera that have ever been included in the chitinozoa. This list excludes purely vernacular terms. It includes all commonly accepted genera, but also genera that are now considered invalid, doubtful (nomina dubia), or were not formally published (nomina nuda), as well as junior synonyms of more established names, and genera that are no longer considered acanthodians.

Naming conventions and terminology

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.
• 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.

Contents:	A B C D E F G H I J K L M N O P Q R S T U V W X Y Z — See also

The List

Genus	Status	Age	Location	Description	Images
*Acanthochitina	Valid.
*Alpenachitina	Valid.
*Amphorachitina	Valid.
*Ancyrochitina	Valid.
*Angochitina	Valid.
*Anthochitina	Valid.
*Belonechitina	Valid.
*Bursachitina	Valid.
*Calpichtina	Valid.
*Cingulochitina	Valid.
*Cladochitina	Valid.
*Clathrochitina	Valid.
*Clavachitina	Valid.
*Conochitina	Valid.
*Coronochitina	Valid.
*Cyathochitina	Valid.
*Cylindrochitina	Valid.
*Desmochitina	Valid.
*Earlachitina	Valid.
*Eisenackitina	Valid.
*Eremochitina	Valid.
*Euconchitina	Valid.
*Fungochitina	Valid.
*Fustichitina	Valid.
*Gotlandochitina	Valid.
*Halochitina	Valid.
*Hercochitina	Valid.
*Hetcochitina	Valid.
*Hoegisphaera	Valid.
*Kalochitina	Valid.
*Lagenochitina	Valid.
*Linochitina	Valid.
*Margachitina	Valid.
*Muscochitina	Valid.
*Parisochitina	Valid.
*Pistillachitina	Valid.
*Plectochitina	Valid.
*Pogonochitina	Valid.
*Pseudoclathrochitina	Valid.
*Pterochitina	Valid.
*Ramochitina	Valid.
*Rhabdochitina	Valid.
*Ollachitina	Valid.
*Sagenachitina	Valid.
*Salopochitina	Valid.
*Siphonochitina	Valid.
*Sphaerochitina	Valid.
*Spinachitina	Valid.
*Tanuchitina	Valid.
*Urochitina	Valid.
*Velatachitina	Valid.

References

• Journal of Paleontology, Jul 1999 by Paris, Florentin, Grahn, Yngve, Nestor, Viiu, Lakova, Iskra
• Institut National de la Recherche Scientifique-Géoressources, C.P. 7500, Sainte-Foy, QC, Canada G1V 4C7
• Geological Survey of Canada (GSC-Québec Division), C.P. 7500, Sainte-Foy, QC, Canada G1V 4C7
• 15466-79A Avenue, Surrey, BC, Canada V3S 8N8 Received 21 October 1999; accepted 1 February 2000. Available online 15 January 2001