|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
It was reranked as the class Crustacea by Latreille (1802), Phleger (1933), Mason (1935) and Riccio (1952); it was reranked as the unranked clade Crustacea by Martens et al. (2005).
It was assigned to Animalia by Latreille (1802); to Branchiata by Mason (1935); to Arthropoda by Martin (1904), Phleger (1933), Riccio (1952) and Martens et al. (2005); and to Pancrustacea by Nielsen (2012).
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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.