 The list consists of formal genera names in the class Gastropoda; it excludes purely vernacular names.It shows all commonly accepted genera, but it also includes genera which are now considered invalid or doubtful ("nomina dubia"), and names that were not formally published ("nomina nuda"), as well as junior synonyms of more established names.The list "also" includes some genera which were first described as gastropods, but which are no longer considered to be gastropods, and which in many cases are not even considered to be mollusks.