Tryphosella camela ( Stebbing, 1910 )

Lowry, J. K. & Stoddart, H. E., 2011, The tryphosine genera Photosella gen. nov. and Tryphosella Bonnier, 1893 (Crustacea: Amphipoda: Lysianassoidea: Lysianassidae: Tryphosinae) in Australian waters 2956, Zootaxa 2956 (1), pp. 1-76 : 25-27

Tryphosella camela ( Stebbing, 1910)

( Figs 13–16 )

Tryphosa camelus Stebbing, 1910: 574 , pl. 47A. — Sheard, 1937: 19. —J.L. Barnard, 1962: 29, 30 (key). — Springthorpe & Lowry, 1994: 11.

Tryphosa nana . Chilton, 1921: 43.

Tryphosella camelus . — Hutchings et al., 1989: 362. — Barnard & Karaman, 1991: 537.

Tryphosella camela . — Lowry & Smith, 2003: 56. — Lowry & Stoddart, 2003: 171.

Type material examined. SYNTYPE, female, AM P.2470, 5.5–6.5 km off Wattamolla , New South Wales, Australia, 34°10'S, 151°11'E, 99–108 m, mud, trawl, 22 March 1898, E. R. Waite, H.M.C.S. Thetis, stn 57 .

Additional material examined. Queensland: 1 ovigerous female, AM P.49513, east of Flynn Reef , 16°40.82'S 146°18.81’E, 200 m, baited trap, 7–8 June 1993, J.K. Lowry, P. Freewater & W. Vader, RV Sunbird , stn QLD-939 ; 1 specimen, AM P.58056, east of Flynn Reef , 16°41.61'S 146°17.94'E, 50 m, baited trap, 25.9°C, 18–19 May 1994, J.K. Lowry & K. Dempsey, RV Sunbird , stn QLD-1032 ; 1 adult male, AM P.47812, east of Mooloolaba , 26°36.21'S 153°34.90'E, 116 m, baited trap, 20.4°C, 2–3 August 1994, J.K. Lowry & K. Dempsey, MV Capricorn I, stn QLD-1125; 6 specimens, AM P.47925, same data, 3–4 August 1994, J.K. Lowry & K. Dempsey, MV Capricorn I, stn QLD-1145; 4 specimens, AM P.47928, same data, stn QLD-1147 ; 2 males, AM P.48019, east of Mooloolaba , 26°36.21'S 153°34.90'E, 100 m, baited trap, 17.2°C, 2–3 July 1995, J.K. Lowry & K. Dempsey, MV Capricorn I, stn QLD-1198; 2 females, AM P.48030, same data, stn QLD-1199 . New South Wales: 6 specimens, AM P.55972, due east of Coffs Harbour , 30°17.49'S 153°13.90'E, 45.4 m, baited trap, 11–12 August 1993, P. Berents, R. T . Springthorpe & W. Vader, MV Cheryl Lee , stn NSW-873 ; 1 specimen, AM P.55974, north-east of Coffs Harbour , 30°15.75'S 15321.98'E, 98 m, baited trap, set 1520 hrs, retrieved 1115 hrs, 12–13 August 1993, P. Berents, R. T . Springthorpe & W. Vader, MV Cheryl Lee , stn NSW-885 ; 1 specimen, AM P.52618, same data, stn NSW-886 ; 2 specimens, AM P.52648, same data, stn NSW-887; 1 ovigerous female and 1 adult male, AM P.48203, north-east of Coffs Harbour , 30°15.94'S 153°21.90'E, 100 m, baited trap, 18.6°C, 8–9 September 1994, J.K. Lowry & K. Dempsey, MV Carrie Anne , stn NSW-984 ; 1 female, AM P.48187, same data, stn NSW-985 ; 6 specimens, AM P.48429, same data, 9–10 September 1994, stn NSW-1006 ; 4 females, AM P.48410, same data, stn NSW- 1007 ; 1 male, 4.4 mm, AM P.69405 and 6 males, AM P.69406, east of Newcastle, 32°53’S 152°35’E, 165 m, bottom tow with plankton net, 15 August 1985, FRV Kapala , stn K85-12-23 ; 1 specimen, AM P.69407, east of Long Reef Point , 33°43’S 151°46’E to 33°44’S 151°46’E, 174 m, epibenthic sled, 20 December 1985, J.K. Lowry & R. T . Springthorpe , FRV Kapala , stn K85-21-08 ; 1 female, ovigerous (4 eggs), 4.0 mm, AM P.69404, east of Port Jackson , 33°52’S 151°23’E, 80 m, shelly mud, epibenthic sled, 11 December 1980, R. T . Springthorpe , FRV Kapala , stn K80-20-11 ; 1 specimen, AM P.41960, 800– 1000 m off Port Botany, east side of Botany Bay , 33°58.75'S 151°11.03'E, 7 m, Smith-McIntyre grab, Australian Museum Party, April or July 1992, stn NSW-769 ; 1 specimen, AM P.69394, Cape Banks , 34°00'S 151°16'E, 65–70 m, The Ecology Lab, January 1991, stn S2 T3-185 ; 2 specimens, AM P.69408, Jibbon Point, Port Hacking , 34°05'S 151°10'E, 15 m, sediment and algae scrapings from rocky substrate, J.K. Lowry & R. T . Springthorpe , 13 August 1981, stn NSW-76 ; 2 specimens, AM P.69396, south-east of Bate Bay , 34°05.9'S 151°12'E, 65–70 m, The Ecology Lab, July 1990, stn S2 T2 ; 1 specimen, AM P.69397, southeast of Bate Bay , 34°06.8'S 151°11'E, 65–70 m, The Ecology Lab, July 1990, stn S3 T2 - R2 ; 1 female, AM P.69398, off Providential Head, Wattamolla , 34°08'S 151°08.5'E, 25–30 m, Smith-Macintyre grab, January 1990, The Ecology Lab, stn S2P2 ; 1 specimen, AM P.52936, same data, stn S2P3 ; 1 specimen, AM P.69395, Bass Point , 34°36'S 150°54'E, 45–50 m, The Ecology Lab, January 1991, stn S2 T4 - R1 ; 1 specimen, AM P.46872, off Wollongong , 34°28.15'S 151°02.37'E, 100 m, baited trap, 15.5°C, 6–7 May 1993, P. Freewater, S. Keable & W. Vader, MV Robin E, stn NSW-776; 2 specimens, AM P.69399, near Moona Moona Creek, Jervis Bay , 35°03.5'S 150°41'E, 4.6 m, kelp holdfasts, 15 August 1981, P.B. Berents, stn NSW-87; 1 ovigerous female, 4.7 mm, AM P.69402, 1 ovigerous female and 2 mature males, AM P.69403, near mouth of Moona Moona Creek, Jervis Bay , 35°03.5'S 150°41'E, 8 m, plankton net by hand along bottom, 2100 hrs, 1 December 1983, P.B. & P.M. Berents, stn NSW-1036; 1 ovigerous female, AM P.69400, Jervis Bay , approx. 35°03’S 150°44’E, 18 m, red algal turf, 5 November 1978, N. Coleman, stn NSW-222 ; 1 specimen, AM P.36210, Murrumbulga Point, Twofold Bay , 37°04'42"S 149°53'06"E, subtidal rock platform, 11 December 1984, S.J. Keable & E.A. Bamber, stn Q2 ; 1 specimen, AM P.36016, same locality, 1.5 m, subtidal rock platform, 9 October 1984, P.A. Hutchings, stn Q5 ; 1 specimen, AM P.36017, north-west of Tararago Point, Twofold Bay , 37°05'S 149°56'E, 23.8 m, 20 February 1985, S.J. Keable & E.L. Albertson, stn E-107 . Victoria: 2 females, MV J62305 , 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 , stn SLOPE 40 . Tasmania: 1 ovigerous female and 1 male, MV J2684 , 42 km south-west of Babel Island, eastern Bass Strait , 40°14.4'S 148°40.0'E, 60 m, muddy sand, grab, 14 November 1981, R . Wilson , RV Tangaroa , stn BSS-165G; 3 specimens, MV J2685 , same data, dredge, stn BSS-165D ; 8 specimens, MV J2686 , 20 km north-north-east of North Point, central Bass Strait , 40°38.0'S 145°23'E, 36 m, muddy shell grit, grab, 4 November 1980, M. Gomon & G.C.B. Poore, FRV Sarda , stn BSS 117G ; 3 males, MV J2687 , same data, epibenthic sled, stn BSS 117S ; 1 specimen, MV J62306 , off Freycinet Peninsula , 41°57.50'S 148°37.90'E, 400 m, coarse shell, WHOI epibenthic sled, 27 July 1986, M.F. Gomon et al., RV Franklin stn SLOPE 48 ; 1 specimen, AM P.51949, east of Fortescue Bay, north of Hippolyte Rocks , 43°06.70'S 148°03.45'E, 100 m, baited trap, 15.6°C, 8–9 April 1994, J.K. Lowry & K. Dempsey, MV Martrudan , stn TAS- 390 ; 1 specimen, AM P.51950, east of Fortescue Bay , 43°07.36'S 145°13.75'E, 400 m, baited trap, 10.0°C, 8–9 April 1994, J.K. Lowry & K. Dempsey, MV Martrudan , stn TAS-400 .

Type locality. 5.5–6.5 km off Wattamolla , New South Wales, Australia, [approximately 34°10'S 151°11'E], 99–108 m depth .

Diagnostic description. Head lateral cephalic lobe subtriangular, apically rounded; eyes apparently absent. Antenna 1 peduncular articles 1 and 2 without anterodistal lobe; accessory flagellum not forming cap, terminal article not offset; flagellum with weak 2-field callynophore, robust setae absent from proximal articles; calceoli absent. Antenna 2 peduncular article 3 short; peduncular articles 4 and 5 not enlarged; flagellum short, calceoli absent. Epistome/Upper lip separate; epistome produced slightly beyond upper lip, broadly rounded; upper lip not produced, straight. Mandible molar with asymmetrically reduced column, proximally setose, distally triturating; article 3 with proximal A3-seta. Maxilla 1 setal-tooth 7 left and right symmetrical, cuspidate along most of sinusoidal inner margin; palp distal margin with apical robust setae. Maxilliped basis without recurved hook; outer plate with 2 short apical robust setae.

Gnathopod 1 subchelate; coxa medium length (length 1.6 x breadth), subtriangular, tapering distally; basis sparsely setose along anterior margin; ischium short; carpus long, subequal in length to propodus, without posterior lobe; margins subparallel, palm slightly acute. Gnathopod 2 palm slightly obtuse. Pereopod 4 coxa without distinct lateral ridge, with a well-developed posteroventral lobe. Pereopod 5 coxa without distinct lateral ridge, without umbo; basis about as long as broad, without photophore, not posteroproximally excavate, posterior margin weakly serrate. Pereopod 7 basis posterodistally produced less than halfway along merus, not posterodistally excavate.

Pleonites 1–3 without mid-dorsal carina, not produced dorsodistally. Epimeron 3 posterior margin smooth, posteroventral corner subquadrate. Urosomite 1 with deep notch and subtriangular, subacute boss. Uropods 1 and 2 outer rami without stout striated robust setae. Uropod 2 inner ramus without constriction. Uropod 3 peduncle without dorsolateral flange, with 1 short apicomedial robust seta; inner and outer rami well developed, outer ramus article 2 short, without plumose setae on rami. Telson moderately cleft, with dorsal robust setae, with 1 apical robust seta on each lobe.

Male (sexually dimorphic characters). Head lateral cephalic lobe a semidome, apically truncated. Antenna 1 flagellum with strong 2-field callynophore; calceoli present, proximal calceolus very large. Antenna 2 peduncular articles 4 and 5 enlarged, proximal calceolus very large; flagellum long, calceoli present. Uropod 3 with plumose setae on both rami.

Remarks. Tryphosella camela is most similar to T. cameloides Lowry & Stoddart, 2009 . Both species have a distinctive subtriangular, subacute boss on urosomite 1. In T. camela this boss is more robust and is preceded by a very deep incision whereas in T. cameloides the boss is laterally very thin. The two species also differ slightly in the shape of the basis of pereopods 5 to 7 and in the number of apical robust setae on the maxilliped outer plate (two in T. camela , three in T. cameloides ).

Tryphosella camela occurred in low numbers (1– 6 specimens) from 50 to 200 m depth from northern Queensland to southern Victoria. In Bass Strait and Tasmania it occurred in samples down to 400 m depth, but still in low numbers. Although it was taken in baited traps all along the coast it was also captured in sledges and grabs .

Distribution. Eastern Australia, from north Queensland to Tasmania, 1.5–400 m depth.

Figures

FIGURE 13. Tryphosella camela (Stebbing, 1910). Female, 4.5 mm, AM P.69402, Jervis Bay, New South Wales.

FIGURE 14. Tryphosella camela (Stebbing, 1910). Female, 4.0 mm, AM P.69404, east of Port Jackson, New South Wales; male, 4.4 mm, AM P.69405, east of Newcastle, New South Wales. Scales represent 0.1 mm.

FIGURE 15. Tryphosella camela (Stebbing, 1910). Female, 4.0 mm, AM P.69404, east of Port Jackson, New South Wales. Scales represent 0.2 mm.

FIGURE 16. Tryphosella camela (Stebbing, 1910). Female, 4.0 mm, AM P.69404, east of Port Jackson, New South Wales; male, 4.4 mm, AM P.69405, east of Newcastle, New South Wales. *syntype female, AM P.2470, off Wattamolla, New South Wales. Scales represent 0.1 mm.