A generic review of the lysianassoid family Uristidae and descriptions of new taxa from Australian waters (Crustacea, Amphipoda, Uristidae) Author Lowry, J. K. Author Kilgallen, N. M. text Zootaxa 2014 2014-09-26 3867 1 1 92 journal article http://dx.doi.org/10.11646/zootaxa.3867.1.1 e5bb465f-e713-45c1-8e0f-2c6125494b44 1175-5326 5585734 B7C6EC5F-5AA3-43B1-BD3D-D8111E0EC3A7 Abyssorchomene distinctus ( Birstein & Vinogradov, 1960 ) Orchomene distinctus Birstein & Vinogradov, 1960: 191 , fig. 10. Orchomene ( Abyssorchomene ) distinctus .— Barnard & Ingram, 1990: 22 , figs 12–14.— Vinogradov, 1993: 43 . Abyssorchomene distinctus .—? Thurston, 1990: 264 (ecology).— Lowry & Stoddart 2003: 281 .— Jamieson, Kilgallen, Rowden, Fujii, Lorz, Kitazawa & Priede, 2011: 55, table 3, 58, table 6 (ecology).—Horton, Thurston & Duffy, 2013: 355, table 2 (ecology). Orchomene distinctus .— Barnard & Karaman, 1991: 508 . Orchomenella distinctus .— Lowry & Stoddart 1994: 181 . Types . Unknown. Type locality. Near Palau , western South Pacific Ocean ( 5°02'N 135°33’E ) 4732 m , trawl 0–2000 m ; East Pacific vent region 13°N, 2635 m . Material examined. 1 female , AM P.70533, east of Sydney , New South Wales , Australia ( 33°50.9’S 152°15.2’E ), 3178–4860 m , Isaacs-Kidd midwater trawl, 26–27 April 1989 , J. R . Paxton , NMAS Cook [ JP 89-2 ] ; 1 specimen , AM P.96583, Hill D 1, south-southeast of South East Cape ( 44°23.4'S 147°16.2'E ), 1942 m , baited trap , 31 January 1997 , CSIRO party on FRV Southern Surveyor , FRV Southern Surveyor [SS01/97/65] . Diagnostic description. Mandible molar setose with triturating surface. Maxilla 2 inner plate significantly shorter than outer plate. Gnathopod 1 subchelate; coxa 1 large, about as long as coxa 2, subtriangular, adze-shaped; ischium not enlarged; propodus margins subparallel; palm transverse, slightly convex . Gnathopod 2 subchelate; palm transverse, margin sinusoidal. Pereopod 7 basis tapering distally . Epimeron 3 posteroventral corner broadly rounded . Telson moderately cleft . Remarks. Abyssorchomene distinctus has a broadly rounded posteroventral corner on epimeron 3 such as A. charcoti , A. musculosus and A. nodimanus . Gnathopod 1 is subchelate in A. distinctus and A. musculosus (parachelate in A. charcoti and A. nodimanus ). There is little difference between A. distinctus and A. musculosus . The palm of gnathopod 1 is slightly convex in A. distinctus (straight in A. musculosus ) and the setal-teeth on maxilla 1 appear to be more slender, but this could be the angle of the illustration. In other respects they appear to be the same. Depth range. 2635–5173 m ( Barnard & Ingram 1990 , Jamieson et al . 2011 ). Distribution. Pacific Ocean: Near Palau ( 5°02'N 135°33’E ) ( Birstein & Vinogradov 1960 ); East Pacific vent region 13°N ( Barnard & Ingram 1990 ); Loyalty Islands ( Lowry & Stoddart 1994 ); Kermadec Trench ( Jamieson et al . 2011 ). North Atlantic Ocean. Cape Verde Plain ( Thurston 1990 ).