e/List of prehistoric medusozoans

Information
has gloss	eng: This list of prehistoric medusozoans is an attempt to create a comprehensive listing of all genera that have ever been included in the subphylum Medusozoa, 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 medusozoans.
lexicalization	eng: List of prehistoric medusozoans
instance of	(noun) (biology) a taxonomic group containing one or more orders class