Revision of Pleuroprion zur Strassen, 1903 (Holidoteidae) and re-evaluation of Spectrarcturus Schultz, 1981 (Arcturidae) (Crustacea, Isopoda, Valvifera) Author Stransky, Bente Author Svavarsson, Jörundur Department of Life and Environmental Sciences, University of Iceland, Askja-Natural Science Building, Sturlugata 7, 102 Reykjavík, Iceland and The University of Iceland´s Research Centre in Suðurnes, Garðvegur 1, 245 Suðurnesjabaer, Iceland Author Poore, Gary C. B. Museums Victoria, GPO Box 666, Melbourne, Vic. 3001, Australia Author Kihara, Terue Cristina INES Integrated Environmental Solutions UG, / Senckenberg am Meer-DZMB, Südstrand 22, 26382 Wilhelmshaven, Germany terue. kihara @ ines-solutions. eu; https: // orcid. org / 0000 - 0002 - 7292 - 251 X text Zootaxa 2020 2020-12-08 4894 1 1 52 journal article 9329 10.11646/zootaxa.4894.1.1 ae160f91-246d-4e3a-ab97-90db87794d20 1175-5326 4315364 A14A6A14-B008-4914-BE10-D4D3F9AEBBA6 Key to species of Spectrarcturus (females) 1a Posterior end of pleotelson bifid.......................................................................... 2 1b Posterior end of pleotelson rounded, pointed or truncated...................................................... 4 2a Distolateral spine on article 3 of antenna about as long as article width.......................... S. hystrix ( Sars, 1877 ) 2b Distolateral spine on article 3 of antenna short, much shorter than article width.................................... 3 3a Pleotelson with tubercles on most dorsal surface....................................... S. murdochi ( Benedict, 1898 ) 3b Pleotelson only with long spines on anterior part.................................. S. intermedius (Richardson, 1899) 4a Pleotelson bluntly truncated, slightly convex apically............................... S. chlebovitschi ( Kussakin, 1972 ) 4b Pleotelson rounded or pointed apically.................................................................... 5 5a Pleotelson widely rounded apically; body without dense setae.................................................. 6 5b Pleotelson pointed apically; body densely setose............................................................. 7 6a Body with numerous short, rounded tubercles............................... S. iturupicus ( Kussakin & Mezhov, 1979 ) 6b Body with several long, slender spines on each pereonite................................ S. toporoki ( Kussakin, 1972 ) 7a Pleotelson distally narrowly pointed; pereonite 4 twice as long as pereonite 3.............. S. fabulosus ( Gurjanova, 1955 ) 7b Pleotelson distally narrow, tounge-like; pereonite 4 1.7 times as long as pereonite 3........... S. furcatus ( Kussakin, 1982 )