page_title: List of prehistoric malacostracans
section_title: Infraorder Astacidea
hierarchical_section_title: List of prehistoric malacostracans / Order Decapoda / Infraorder Astacidea
caption_attribution_description: English: Fossil lobster Palaeonephrops browni from the Cretaceous Bearpaw Shale in Montana, on display at the San Diego County Fair, California, USA.
context_page_description: This list of prehistoric malacostracans illustrates the genera from the fossil record that have ever been considered to be malacostracans, a class of crustacean arthropod, excluding purely vernacular terms. The list includes all commonly accepted genera, but also genera that are now considered invalid, doubtful, or were not formally published, as well as junior synonyms of more established names, and genera that are no longer considered malacostracans. The majority of the genera are from the order Decapoda, for which a recent synopsis allows invalid names to be excluded.
caption: Palaeonephrops browni (Bearpaw Shale, Cretaceous)
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