List Of Crinoid Genera
This list of crinoid genera is an attempt to create a comprehensive listing of all genera that have ever been considered to be crinoids, excluding purely vernacular terms. The list 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 crinoids. Naming conventions and terminology Naming conventions and terminology follow the International Code of Zoological Nomenclature (ICZN). 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 dec ...
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Abrotocrinus
''Abrotocrinus'' is an extinct genus of crinoids. Fossil records This genus is known in the fossil records of the Carboniferous period of United States and Canada (age range: 353.8 to 345.0 million years ago). See also * List of crinoid genera This list of crinoid genera is an attempt to create a comprehensive listing of all genera that have ever been considered to be crinoids, excluding purely vernacular terms. The list includes all commonly accepted genera, but also genera that a ... References Cladida Prehistoric crinoid genera Paleozoic life of Alberta Paleozoic echinoderms of North America {{paleo-crinoidea-stub ...
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