A new superfamily and family of the infraorder Hadziida (Amphipoda, Senticaudata) based on a new genus and species from the Clarion-Clipperton Zone, Pacific Ocean

A remarkable new amphipod species, Mirabestia maisie sp. nov., is described from the Clarion-Clipperton Zone, abyssal Pacific Ocean, at depths of 4130-4309 m. The species is described within the new taxa Mirabestioideasuperfam. nov., Mirabestiidaefam. nov., and Mirabestia gen. nov., within the suborder Senticaudata. Diagnoses and molecular sequences of five nuclear and mitochondrial genetic markers are provided for the new species. A preliminary phylogenetic reconstruction of the infraorder Hadziida is also presented, based on a concatenated dataset of the COI and histone 3 genetic markers.