This list of prehistoric malacostracans illustrates the
genera from the fossil record that have ever been considered to be
malacostracans, a class of
crustaceanarthropod, 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 malacostracans.[1] The majority of the genera are from the order
Decapoda, for which a recent synopsis allows invalid names to be excluded.[2]