This paper addresses the phylogeny of the superfamily Paratanaidoidea using computer-assisted parsimony n~cthodsO. ur morphologically based, empirical analysis uses exeinplar species from all familics and most genera 111 thc superfamily. Specics of Apscudomorpha, Neotanaidomorpha and Tanaidoidea were employed as out-groups. Thc analysis supports most of the older systematics, including the inonophyly of Paratanaididae, Leptochcliidac (in part), Nototanaididae, Psendotanaididae and Pseudozeuxidae (excluding Heter.otnnnoides). Thc analysis does not support the monophyly of Typhlotanaididae and Anarthruridae and suggests that both families be split up. The corc gencra of Typhlotanaididae are combined with the Nototanaididae under thc name Nototanaididae. Other genera of Typhlotanaididae are left without family designation. Anartliruridae is divided into five families, Agathotanaididae, Anarthruridae, Leptognathiidae, Tanacllidae fam. nov. and Colletteidae fam. nov., but a large part of the anarthrurid genera could not bc designated to families. The Leptocheliidae could neither be rejected nor verified but a subfamilial division (Heterotanaidinae subfam. nov. and Lcptocheliinae) seems appropriate. A new proposal for the higher-level taxonomy of the Paratanaidoidca is presented. Many tanaidacean names have been corrected to make them agree with the presumed Latin stem 'tanaid-'.
