Rectarcturidae Poore, 2001 rediagnosed with descriptions of new Australian genera and species (Isopoda: Valvifera) Author Poore, Gary C. B. Museum Victoria, GPO Box 666, Melbourne, Victoria 3001, Australia gpoore@museum.vic.gov.au text Memoirs of Museum Victoria 2013 2013-08-30 70 17 36 journal article 10.24199/j.mmv.2013.70.03 1447-2554 urn:lsid:zoobank.org:pub:84546808-FAA2-4838-BFBD-4D3582415F45 Galathearcturus gen. nov. Zoobank LSID. http://zoobank.org/ urn:lsid:zoobank.org:act: E79071AD-6121-4517-A9AB-A325E25456BA Type species . Galathearcturus antoniae sp. nov. , by monotypy and original designation. Diagnosis . Head with paired submedian tubercles, pereonites with smooth transverse ridges, anterior pleonites barely elevated. Antenna 1.5 times dorsal length of (head + pereonite 1); article 3 cuboid, as long as deep, without ventrolateral flange; article 4 subspherical, about as long as fused articles (1 + 2); article 5 cylindrical, 2.4 times as long as article 4, 5 times as long as wide. Pereopod 2 propodus palm convex, denticulate; (dactylus body + unguis) 3 times as long as propodus; unguis setiform, as long as dactylus body. Pereopod 3 similar to pereopod 2, unguis shorter. Male pleopod 1 exopod unknown. Oostegites 5 a pair of adjacent oval discs. Etymology . From Galathea , the ship and expedition that collected the type species, and Arcturus , generic stem. Composition . Type species only. Distribution . Southern Qld, Australia . Remarks . The sole species of Galathearcturus shares a short antenna and long pereopod 2 dactylus with the three species of Tasmarcturus , but differs in dorsal sculpture; this species is the least sculptured of all rectarcturid genera. Unfortunately, the male is unknown.