First Australian records of Ethusina (Crustacea: Decapoda: Ethusidae) and additional records from New Zealand Author Ahyong, Shane T. Author Farrelly, Caroline A. text Zootaxa 2018 2018-09-27 4486 2 161 168 journal article 29547 10.11646/zootaxa.4486.2.5 f8bc1f95-5358-4af7-87f8-adff028aa4a2 1175-5326 1436719 7CE9F0D2-EF87-45DE-BE7C-73BC79BCA7F6 Ethusina robusta (Miers, 1886) ( Fig. 1D , 3D–E ) Ethusa ( Ethusina ) gracilipes var. robusta MierS, 1886: xxvii, 333, pl. 29 fig. 2 [TYpe lOcaliTY: Arafura Sea, INdONeSia, bY lecTOTYpe deSigNaTiON; CaSTrO 2005]. Ethusa ( Ethusina ) investigatoris AlcOck, 1896: 285 [TYpe lOcaliTieS: BaY Of BeNgal aNd Laccadive Sea]. Ethusina alcocki Ng & HO, 2003: 74, figS 4, 5 [TYpe lOcaliTY: Off SOuTHerN TaiWaN]. Ethusina robusta .—CaSTrO 2005: 570–575, figS. 22, 25. Ethusa Sp. MOV 5007.—POOre et al. 2008: 45 (parT). Material examined. AUSTRALIA : Queensland : QM w14203, 1 male (cl 7.8 mm , cw 6.9 mm ), Coral Sea, E of Cape York , 10°29.21'S , 144°49.23'E , 1503–1520 m , CIDARIS III Expedition , stn 5-1, beam trawl, M. Pichon , A. Birtles , P. Arnold , 10 February 1992 ; NMV J72891 , 1 female (cl 9.7 mm , cw 9.8 mm ), E of Gladstone , 23°35.22– 37.02'S, 154°11.64–11.68'E, 1013–1093 m , IN2017_ V03 _121_133, 13 June 2017 ; NMV J72889 , 1 juvenile male (cl 7.4 mm , cw 6.4 mm ), 1 ovigerous female (cl 8.6 mm , cw 8.2 mm ), 2 females (cl 8.5 mm , cw 7.5 mm ; cl 8.7 mm , cw 7.8 mm ), E of Gladstone , 23°35.22–37.02'S, 154°11.64–11.68'E, 1013–1093 m , IN2017_ V03 _121_132, 13 June 2017 ; NMV J72892 , 1 juvenile male (cl 6.9 mm , cw 6.0 mm), E of Burleigh Heads , 28°03.27–05.82'S, 154°04.98–04.86'E, 999–1013 m , IN2017_ V03 _100_134, 9 June 2017 . New South Wales : NMV J72887 , 1 female (cl 11.2 mm , cw 11.0 mm), E of woolgoolga, 30°05.94–07.68'S, 153°34.36–35.76'E, 1194–1257 m , IN2017_ V03 _080 -176, 5 June 2017 . Western Australia : NMV J58739 , 2 females (cl 7.0 mm, cw 5.6 mm ; cl 7.7 mm , cw 5.5 mm ), N of North west Cape , Barrow L 1 transect, 20°57.15–57.56'S, 114°00.78–00.56'E, 1000 m , SS05/07/002, coll. M. Gomon , 9 June 2007 ; NMV J55605 , 1 female (cl 8.4 mm , cw 7.2 mm ), off Two Rocks, 31°43.458–43.104'S, 115°14.640– 14.466'E, 102 m , beam trawl, SS10/05/002, coll. R. wilson, 19 November 2005 ; NMV J53952 , 1 juvenile male (cl 6.5 mm , cw 5.6 mm ), Perth Canyon, 31°58.283–57.317'S, 115°06.000–06.833'E, 848–1050 m , SS10/05/071, beam trawl, coll. R. wilson, 29 November 2005 . Remarks. The present specimens constitute the first records of E. robusta from Australia and conform well to recent published accounts of the species (i.e., Ho & Ng 2003, as E. alcocki ; Castro 2005). The western Australian material was among specimens listed by Poore et al. (2008) as “ Ethusa sp. MoV 5007” ( Fig. 3E ). In the present series, the length:height proportions of the pereopod 2 merus occupy a similar range in both sexes: 8.4–11.5 (males) and 8.4–11.0 (females) and largely correspond to ratios reported by Castro (2005). Apparently, the chelipeds and walking legs of E. robusta are more brightly pigmented in juveniles than adults ( Figs. 3D, E ). The males ( Fig. 3D ), all small, usually have proportionally shorter, less divergent outer orbital teeth than other specimens ( Fig. 3E ), approaching that figured by Alcock & MacGilchrist (1905: pl. 72 fig. 3, 3a) for a male syntype of E. investigatoris . In one male (QM w14203, cl 7.8 mm ; Fig. 1D ), the pereopod 2 merus is proportionally stouter than in other males (length:height 8.4 versus 10.1–11.5) and the cornea extends laterally to, but not beyond, the lateral margin of the outer orbital spine—these differences are probably a function of individual variation and small body size. Distribution. western India to Indonesia , the Solomon Islands , New Caledonia , Vanuatu , Taiwan and Fiji ; now also from Australia ; 102–2624 m (usually> 800 m ) (Castro 2005).