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 3965 10.11646/zootaxa.3867.1.1 e5bb465f-e713-45c1-8e0f-2c6125494b44 1175-5326 5585734 B7C6EC5F-5AA3-43B1-BD3D-D8111E0EC3A7 Stephonyx pirloti ( Sheard, 1938 ) ( Figs 42–44 ) Euonyx normani .— Chilton, 1921: 52 , figs 5a–d.— Pirlot, 1933: 120 (key).— Sheard, 1937: 19 . Euonyx pirloti Sheard, 1938: 170 , figs 1–3.—J.L. Barnard, 1958: 92 .— Zeidler, 1986: 109 .— Barnard & Ingram, 1990: 3 (key).— Barnard & Karaman, 1991: 485 . Euonyx pirloti .— Springthorpe & Lowry, 1994: 28 . Stephonyx pirloti .— Lowry & Stoddart, 1989: 521 .— Lowry & Stoddart, 2003: 284 .— Diffenthal & Horton, 2007: 39 (key).— Senna & Serejo, 2007: 13 (key).— Narahara et al. , 2012: 1505 (key). Types. Syntypes , five specimens (one dissected), SAMA C2177 ; one microscope slide (lost) SAMA C2201 . Type locality. Nepean Bay , Kangaroo Island , South Australia (~ 35°42'S 137°45'E ) . Additional material examined. New South Wales . 1 specimen , AM P.57649, north-east of Coffs Harbour ( 30°14.63’S 153°24.68’E ), 199 m , baited trap , 12–13 August 1993 , P.B. Berents , R . T . Springthorpe & W. Vader , MV Cheryl Lee [NSW-882]; 5 specimens , AM P.63983; 320 specimens , AM P.44268; 1 specimen , AM P.63984, off Wollongong ( 34°31.48’S 151°13.22’E ), 200 m , baited trap, 27–28 March 1994 , J.K. Lowry & K. Dempsey, MV Robin E [NSW-946]; 628 specimens , AM P.44258, off Wollongong ( 34°31.48’S 151°13.22’E ), 200 m , baited trap , 27–28 March 1994 , J.K. Lowry & K. Dempsey , MV Robin E [NSW-944]; 87 specimens , AM P.43486, off Wollongong ( 34°31.48’S 151°13.22’E ), 200 m , baited trap , 27–28 March 1994 , J.K. Lowry & K. Dempsey , MV Robin E [NSW-945]; 446 specimens , AM P.44245; 446 specimens , AM P.44307, off Wollongong ( 34°31.48’S 151°13.22’E ), 200 m , Globigerina ooze, baited trap , 28–29 March 1994 , J.K. Lowry & K. Dempsey , MV Robin E [NSW-964]; 439 specimens , AM P.46909, off Wollongong ( 34°32.02’S 151°13.0’E ), 200 m , baited trap , 6–7 May 1993 , P. Freewater & party, MV Robin E [NSW-781]; 2 specimens , AM P.44417, off Wollongong ( 34°33.02’S 151°16.53’E ), 400 m , Globigerina ooze, baited trap , 7–8 May 1993 , P. Freewater & party, MV Robin E [NSW-803]; 1 female , AM P.96595; 1 male , AM P.96594, 1832 specimens, AM P.44231, off Wollongong ( 34°31.48’S 151°13.22’E ), 200 m , Globigerina ooze, baited trap , 28–29 March 1994 , J.K. Lowry & K. Dempsey , MV Robin E [NSW-962]; 1 specimen , AM P.44429, off Wollongong ( 34°32.38’S 151°15.0’E ), 300 m , Globigerina ooze, baited trap , 7–8 May 1993 , P. Freewater & party, MV Robin E [NSW-801]; 377 specimens , AM P.46928, off Wollongong ( 34°32.02’S 151°13.0’E ), 200 m , baited trap , 6–7 May 1993 , P. Freewater & party, MV Robin E [NSW-780]; 437 specimens , AM P.47037, off Wollongong ( 34°32.08’S 151°12.55’E ), 200 m , baited trap , 7–8 May 1993 , P. Freewater & party, MV Robin E [NSW-797]; 1 specimen , AM P.51131, north-east of Coffs Harbour ( 30°10.88’S 153°32.22’E ), 1000 m , baited trap , 12–13 August 1993 , P.B. Berents , R . T . Springthorpe & W. Vader , MV Cheryl Lee [NSW-877] ; 1 specimen , AM P.85714, south-east of Port Stephens ( 32°52’S 152°32’E ), 145 m , dredge, 6 December 1978 , FRV Kapala [K78-26-07]; 367 specimens , AM P.47023, off Wollongong ( 34°32.08’S 151°12.55’E ), 200 m , baited trap , 7–8 May 1993 , P. Freewater & party, MV Robin E [NSW-798]; 1 specimen , AM P.85715, east of The Entrance ( 33°22’S 152°04’E ), 205 m , benthic trawl, 11 February 1986 , FRV Kapala [K86-01- 04]; 59 specimens , AM P.43513, off Wollongong ( 34°31.48’S 151°13.22’E ), 200 m , baited trap , 28–29 March 1994 , J.K. Lowry & K. Dempsey , MV Robin E [NSW-963]; 1 specimen , AM P.24235, east of Long Reef ( 33º44’S 151º22’E ) 32 m , 1973, Australian Museum Shelf Benthic Survey . South Australia . 1 specimen , AM P.68511, Kangaroo Island , Penneshaw , 8 km off Hogg Point , ( 35°37’S 137°57’E ), 25 m , trawl, 30 May 2001 , W. Rumball , MRV Ngérin ; 1 specimen , AM P.85719, Gulf St Vincent , 8–10 km off Semaphore ( 34°52'S 138°20'E ), 9 m , 1925–1925, H.M. Hale [ SA 74 ]; 1 specimen , AM P.85718, Investigator Strait ( 35°33'S 137°37'E ), 50–80 m , J.C. Verco ; 5 specimens , AM P.85709, Yorke Peninsula, Edithburgh Pier ( 35°05'S 137°45'E ), 3 m , baited trap , 16 April 2008 , T . Laperousaz ; 2 specimens , AM P.85713, Gulf St Vincent , Marino ( 35°03'S 138°31'E ), 1910, W.H. Baker [ SA 79 ]; 2 specimens , SAMA C8034 , Dangerous Reef , Spencer Gulf , South Australia , [approx. 34°49’S 136°12’E ], dredged, K. Sheard ; 1 specimen , SAMA C8035 , 8 miles off Halletts Cove , Gulf St Vincent , South Australia [approx. 35°05’S 138°30’E ], 30 m , A. T . trawl, 2-2.30 a.m., 14 April 1945 , H.M. Hale & K. Sheard ; 1 specimen , SAMA C8036 , Whalers Bay , Thistle Island , South Australia [approx. 35°00’S 136°11’E ], 7 fms [ 12.8 m ], 3 March 1941 , K. Sheard . Tasmania . 1 male , AM E.6521, Bass Strait , east coast of Flinders Island ( 40°00'S 148°30'E ), 1909-1914, FIS Endeavour ; 87 specimens , AM P.38829; 11 specimens , AM P.50876; 450 specimens , AM P.50877, mouth of Fortescue Bay ( 43°07.76’S 147°59.98’E ), 50 m , baited trap , 8–9 April 1994 , J.K. Lowry & K. Dempsey , MV Martrudan [TAS-386]; 549 specimens , AM P.51037, east of Fortescue Bay ( 43°06.7’S 148°13.6’E ), 200 m , baited trap , 17–18 April 1993 , J.K. Lowry & P. Freewater , MV Tasmanian Enterprise [TAS-376]; 1 specimen , AM P.51224, east of Fortescue Bay ( 43°06.7’S 148°13.6’E ), 200 m , baited trap , 8–9 April 1994 , J.K. Lowry & K. Dempsey , MV Martrudan [TAS-393]; 1 specimen , AM P.57709, east of Fortescue Bay ( 43°09.36’S 148°13.6’E ), 300 m , baited trap , 17–18 April 1993 , J.K. Lowry & P. Freewater , MV Tasmanian Enterprise [TAS-378]; 52 specimens , AM P.51015, east of Fortescue Bay ( 43°06.7’S 148°13.6’E ), 200 m , baited trap , 16–17 April 1993 , J.K. Lowry & P. Freewater , MV Tasmanian Enterprise [TAS-356]; 17 specimens , AM P.50932, east of Fortescue Bay ( 43°06.7’S 148°13.6’E ), 200 m , baited trap , 16–17 April 1993 , J.K. Lowry & P. Freewater , MV Tasmanian Enterprise [TAS-357]; 1 specimen , AM P.85717, off Babel Island ( 39°55'S 148°31'E ), 25 m over a bottom depth of 51 m , horizontal plankton haul, 20 January 1939 , CSIRO , FRV Warreen [29/39]; 8 specimens , AM P.51147, east of Fortescue Bay ( 43°09.36’S 148°13.6’E ), 300 m , baited trap , 17–18 April 1993 , J.K. Lowry & P. Freewater , MV Tasmanian Enterprise [TAS-377]; 1 specimen , AM P.51139, east of Fortescue Bay ( 43°09.36’S 148°13.6’E ), 300 m , baited trap , 16–17 April 1993 , J.K. Lowry & P. Freewater , MV Tasmanian Enterprise [TAS-359]; 2 specimens , AM P.51227, east of Fortescue Bay ( 43°06.7’S 148°13.6’E ), 200 m , baited trap , 8–9 April 1994 , J.K. Lowry & K. Dempsey , MV Martrudan [TAS-394]; 700 specimens , AM P.50891, east of Fortescue Bay , north of Hippolyte Rocks ( 43°06.7’S 148°03.45’E ), 100 m , baited trap , 8–9 April 1994 , J.K. Lowry & K. Dempsey , MV Martrudan [TAS-390]; 771 specimens , AM P.51188; 41 specimens , AM P.51190, east of Fortescue Bay , north of Hippolyte Rocks ( 43°06.7’S 148°03.45’E ), 100 m , baited trap , 8–9 April 1994 , J.K. Lowry & K. Dempsey , MV Martrudan [TAS-391]; 1820 specimens, AM P.51329, east of Fortescue Bay , north of Hippolyte Rocks ( 43°06.7’S 148°03.45’E ), 100 m , baited trap , 9–10 April 1994 , J.K. Lowry & K. Dempsey , MV Martrudan [TAS-408]; 356 specimens , AM P.51315, east of Fortescue Bay , north of Hippolyte Rocks ( 43°06.7’S 148°03.45’E ), 100 m , baited trap , 9–10 April 1994 , J.K. Lowry & K. Dempsey , MV Martrudan [TAS-409]; 2903 specimens, AM P.51033, east of Fortescue Bay , north of Hippolyte Rocks ( 43°06.7’S 148°03.45’E ), 100 m , baited trap , 17–18 April 1993 , J.K. Lowry & P. Freewater , MV Tasmanian Enterprise [TAS-372]; 11004 specimens, AM P.50821, east of Fortescue Bay , north of Hippolyte Rocks ( 43°06.7’S 148°03.45’E ), 100 m , baited trap , 16–17 April 1993 , J.K. Lowry & P. Freewater , MV Tasmanian Enterprise [TAS-354]; 3187 specimens, AM P.50866, east of Fortescue Bay , north of Hippolyte Rocks ( 43°06.7’S 148°03.45’E ), 100 m , baited trap , 17–18 April 1993 , J.K. Lowry & P. Freewater , MV Tasmanian Enterprise [TAS-371]; 188 specimens , AM P.51157, east of Fortescue Bay ( 43°06.7’S 148°13.6’E ), 200 m , baited trap , 17–18 April 1993 , J.K. Lowry & P. Freewater , MV Tasmanian Enterprise [TAS-374]; 1 specimen , AM P.85712, Bass Strait , east of Flinders Island ( 40°01'S 148°02'E ), m, FIS Endeavour , 1909-1914, FIS Endeavour ; 67 specimens , AM P.46651, mouth of Fortescue Bay ( 43°07.76’S 147°59.98’E ), 50 m , baited trap , 17–18 April 1993 , J.K. Lowry & P. Freewater , MV Tasmanian Enterprise [TAS-368]; 2 specimens , AM P.85711, north side of Cape Sorell ( 42°11.5’S 145°10.8’E ), 13 m , baited trap , 27–28 April 1991 , J.K. Lowry & S.J. Keable , Flying Scud [TAS-301]; 35 specimens , AM P.85716, Freycinet Peninsula , about 800 m east of Point Geographe ( 42°17.0'S 148°18.8'E ), 45 m , baited trap , 30 April 1991 – 1 May 1991 , J.K. Lowry & S.J. Keable , Flying Scud [TAS-337]; 13 specimens , AM P.50839, mouth of Fortescue Bay ( 43°07.76’S 147°59.98’E ), 50 m , baited trap , 17–18 April 1993 , J.K. Lowry & P. Freewater , MV Tasmanian Enterprise [TAS-370]; 200 specimens , AM P.50915, mouth of Fortescue Bay ( 43°07.76’S 147°59.98’E ), 50 m , baited trap , 9–10 April 1994 , J.K. Lowry & K. Dempsey , MV Martrudan [TAS-405]; 1 specimen , AM P.85710, off the coast of Tasmania , Australia ( 42°00'S 146°45'E ), 1909-1914, FIS Endeavour ; 259 specimens , AM P.50884, mouth of Fortescue Bay ( 43°07.76’S 147°59.98’E ), 50 m , baited trap , 8–9 April 1994 , J.K. Lowry & K. Dempsey , MV Martrudan [TAS-387]; 9963 specimens, AM P.45772, east of Fortescue Bay , north of Hippolyte Rocks ( 43°06.7’S 148°03.45’E ), 100 m , baited trap , 16–17 April 1993 , J.K. Lowry & P. Freewater , MV Tasmanian Enterprise [TAS-353]; 511 specimens , AM P.45741, mouth of Fortescue Bay ( 43°07.76’S 147°59.98’E ), 50 m , baited trap , 16–17 April 1993 , J.K. Lowry & P. Freewater , MV Tasmanian Enterprise [TAS-350]; 47 specimens , AM P.51394, mouth of Fortescue Bay ( 43°07.76’S 147°59.98’E ), 50 m , baited trap , 9–10 April 1994 , J.K. Lowry & K. Dempsey , MV Martrudan [TAS-406]; 86 specimens , AM P.46644, mouth of Fortescue Bay ( 43°07.76’S 147°59.98’E ), 50 m , baited trap , 16–17 April 1993 , J.K. Lowry & P. Freewater , MV Tasmanian Enterprise [TAS-352]; 2 specimens , AM P.51167, east of Fortescue Bay ( 43°07.36’S 148°13.75’E ), 400 m , baited trap , 17–18 April 1993 , J.K. Lowry & P. Freewater , MV Tasmanian Enterprise [TAS-380]; 2 specimens , AM P.51173, east of Fortescue Bay ( 43°07.36’S 148°13.75’E ), 400 m , baited trap , 17–18 April 1993 , J.K. Lowry & P. Freewater , MV Tasmanian Enterprise [TAS-382]; 1 specimen , AM P.51181, east of Fortescue Bay ( 43°08.96’S 148°15.36’E ), 1000 m , baited trap , 17–18 April 1993 , J.K. Lowry & P. Freewater , MV Tasmanian Enterprise [TAS-384]; 1 specimen , NMV J67769 , 5 km north-east of Mistaken Cape, Maria Island , Tasmania ( 42º37.0’S 148º12.5’E ), 100 m , fine muddy bryzoan, epibenthic sled, 23 April 1985 , RV Challenger [ MV TAS-31]; 2 specimens , NMV J67766 , 25 km north-east of Deal Island , Tasmania , eastern Bass Strait , Australia ( 39°16.8'S 147°33.2'E ), 57 m , medium sand, epibenthic sled, 18 November 1981 , RV Tangaroa [ BSS 174 S]; 1 specimen , NMV J67761 , 9 km south-south-west of Cape Adansan , Three Hummock Island , central Bass Strait , Australia ( 40°30.9'S 144°56'E ), 27 m , very coarse sand, epibenthic sled, 2 November 1980 , M. Gomon & G.C.B. Poore , FRV Sarda [ BSS 109 S]; 5 specimens , NMV J67762 , 9 km south-south-west of Cape Adansan , Three Hummock Island , central Bass Strait , Australia ( 40°30.9'S 144°56'E ), 27 m , very coarse sand, epibenthic sled, 2 November 1980 , M. Gomon & G.C.B. Poore , FRV Sarda [ BSS 109 S] . Victoria . 1 specimen , NMV J67767 , south of Point Hicks ( 38°17.70'S 149°11.30'E ), 400 m , coarse sand, gravel, mud, many sponges, WHOI epibenthic sled, 24 July 1986 , M.F. Gomon et al., RV Franklin [ SLOPE 40 ]; 1 specimen , NMV J7469 , 51 km south-south-west of Cape Otway, western Bass Strait , Australia ( 39°16'S 143°17'E ), 90 m , medium sand, dredge, 10 October 1980 , G.C.B. Poore , HMAS Kimbla [BSS-73D]; 3 specimens , NMV J67764 , 15 km east of Cape Wellington , Wilsons Promontory , Victoria , eastern Bass Strait , Australia ( 39º03.2'S 146º39.5'E ), 55 m , muddy fine sand, epibenthic sled, 18 November 1981 , R . Wilson , RV Tangaroa [BSS-179S]; 1 specimen , NMV J7446 , 25 km west-south-west of Cape Otway , western Bass Strait , Australia ( 38°55'S 143°25'E ), 67 m , coarse sand, dredge, G.C.B. Poore , 8 October 1980 , HMAS Kimbla [BSS-53D]; 1 specimen , NMV J67763 , 70 km south-west of Cape Otway , western Bass Strait , Australia ( 39°26.3'S 143°06.8'E ), 115 m , sand, epibenthic sled, 21 November 1981 , R . Wilson , RV Tangaroa [BSS-194S] . Western Australia . 5 specimens , AM P.78479, north-east of Dampier , drill platform, ( 19°46.28'S 115°20.03'E ), 222 m , baited trap , 17 July 2008 , H. Smith . Description. Based on female, 18.9 mm , AM P.96595. Head, lateral cephalic lobe rounded; eyes reniform. Antenna 1 peduncular article 1 without anterodistal lobe; accessory flagellum not forming cap, 10-articulate, terminal article not offset; primary flagellum with strong 2-field callynophore; calceoli absent. Antenna 2 peduncular article 3 short; articles 3 to 5 not enlarged, brush setae absent; flagellum long; calceoli absent. Labrum, epistome and upper lip fused, slightly concave proximally, with central bulge . Mandible molar setose with vestigial triturating surface; palp attached proximally, article 2 not broadened distally, article 3 blade-like. Maxilla 1 outer plate setal-tooth 7 present, cuspidate distally along inner margin; palp distal margin with apical robust setae. Maxilliped outer plate with 3 long apical robust seta. Gnathopod 1 chelate; coxa reduced, significantly shorter than coxa 2, subquadrate; basis sparsely setose along anterior margin; ischium very long (length 4 × to 6 × breadth); carpus very long (length more than 4 × breadth), subequal in length to propodus, without posterior lobe; propodus margins subparallel, palm obtuse, entire, straight; dactylus simple. Gnathopod 2 propodus palm transverse to slightly acute , straight . Pereopod 4 coxa with a welldeveloped posteroventral lobe. Pereopod 5 coxa without distinct lateral ridge; basis broader than long, posterior margin not serrate. Pereopod 7 basis posterodistally produced less than halfway along merus. Pleonite 3 without mid-dorsal carina, not produced dorsodistally, posterodorsal margin not produced. Epimeron 3 posterior margin smooth, posteroventral corner narrowly rounded . Urosomite 1 not projecting over urosomite 2, with anterodorsal notch and slightly rounded boss. Uropod 2 inner ramus without constriction. Uropod 3 peduncle without dorsolateral flange; outer ramus article 2 short, with strong plumose setae on both rami. Telson deeply cleft ; without dorsal robust setae; with 1 apical robust setae on each lobe. Sexually dimorphic characters. Based on male, 17.0 mm, AM P.96594. Antenna 1 flagellum article 1 longer than female, with strong 2-field callynophore, stronger than female; calceoli present. Antenna 2 flagellum calceoli present. FIGURE 42. Stephonyx pirloti ( Sheard, 1938 ) , female, 18.9 mm, AM P. 96595, from off Wollongong, New South Wales, Australia. FIGURE 43. Stephonyx pirloti ( Sheard, 1938 ) , female, 18.9 mm, AM P. 96595; male 17.0 mm, AM P. 96594, from off Wollongong, New South Wales, Australia. Scale bars: 0.5 mm. FIGURE 44. Stephonyx pirloti ( Sheard, 1938 ) , female, 18.9 mm, AM P. 96595, from off Wollongong, New South Wales, Australia. Scale bars: 0.5 mm. Habitat. Marine. Depth range. 3–1000 m (this study). Feeding strategies. Scavenger, taken in baited traps. Remarks. Stephonyx pirloti is a distinctive species. It differs from other species in the genus by the epistome which is fused and by the long first article on the mandibular palp. The gnathopod 2 carpus, as illustrated by Sheard (1938) was about 3.5 × as long as the propodus. In material we have examined from Kangaroo Island, the type locality, the carpus is about 2.5 × as long as the propodus. In a selection of material we found a range from 2.2 × to 2.8 × the propodus, well outside the length ratio of Sheard. The most frequent length ratio is about 2.5. In all other respects our material corresponds with the material of Sheard 1938 . Distribution. Australia . Coasts of New South Wales (this study); Flinders Islands, Victoria ( Chilton 1921 ); Gulf St Vincent, Kangaroo Island South Australia ( Sheard 1938 ; this study); Tasmania (this study); Western Australia (this study).