Hexapoda, Remipedia

    The placement of the extinct trilobites is also a frequent subject of dispute.[90] One of the newer hypotheses is that the chelicerae have originated from the same pair of appendages that evolved into antennae in the ancestors of Mandibulata, which would place trilobites, which had antennae, closer to Mandibulata than Chelicerata.[91]

Since the International Code of Zoological Nomenclature recognises no priority above the rank of family, many of the higher-level groups can be referred to by a variety of different names.[92][better source needed]

Interaction with humans