|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
It was reranked as the class Malacostraca by Martin (1904), Bengtson (1992), Martin and Davis (2001), Sepkoski (2002), Kiessling (2003) and Briggs et al. (2004).
It was assigned to Crustacea by Latreille (1802); to Arthropoda by Sepkoski (2002); and to Crustacea by Martin (1904), Bengtson (1992), Martin and Davis (2001), Kiessling (2003) and Briggs et al. (2004).
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.