Tryphosella sorell, Lowry & Stoddart, 2011

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 : 55-59

publication ID

https://doi.org/ 10.11646/zootaxa.2956.1.1

persistent identifier

https://treatment.plazi.org/id/DC2F87F6-F63B-FFAA-A69E-FF0EBED9FE7A

treatment provided by

Felipe

scientific name

Tryphosella sorell
status

sp. nov.

Tryphosella sorell sp. nov.

( Figs 37–40 View FIGURE 37 View FIGURE 38 View FIGURE 39 View FIGURE 40 )

Tryphosella sp. 135. — Lowry & Smith, 2003: 56.

Type material. HOLOTYPE, female, ovigerous (4 eggs), 5.6 mm, AM P.69380, about 100 m west of Turners Rock and 80 m offshore, north side of Cape Sorell, Tasmania, Australia, 42°11.5'S 145°10.8'E, 13 m, baited trap, probably rocky bottom with sand patches, 27–28 April 1991, RV Flying Scud, J.K. Lowry & S.J. Keable, stn TAS- 301 GoogleMaps . PARATYPES: 1 male, 5.5 mm, AM P.69381; 1 male, AM P.69382; 1 female, AM P.69383; 1085 specimens, AM P.69384; same data as Holotype GoogleMaps .

Additional material examined. New South Wales: 1 specimen, AM P.48399, off Wollongong , 34°26.42'S 150°58.04'E, 50 m, baited trap, 7–8 May1993, P. Freewater, MV GoogleMaps Robin E, stn NSW-792; 6 specimens, AM P.44299, off Wollongong , 34°26.54'S 150°57.98'E, 50 m, baited trap, 27–28 March 1994, J.K. Lowry & K. Dempsey, MV GoogleMaps Robin E, stn NSW-939; 1 specimen, AM P.44315, same data, stn NSW-940 ; 5 specimens, AM P.44331, same data, 28–29 March 1994, stn NSW-958 . Victoria: 85 specimens, AM P.84634, Bay of Islands , 38°35'S 142°49.5'E, 1.5 m, airlift over rubble, 28 April 1988, R. T GoogleMaps . Springthorpe , stn VIC-76 . Tasmania: 14 specimens, MV J2682 , 20 km north-north-east of North Point, central Bass Strait , 40°38.0'S 145°23'E, 36 m, muddy shell grit, epibenthic sled, 4 November 1980, M. Gomon & G.C.B. Poore, FRV Sarda , stn BSS 117S; 1 ovigerous female, 6.1 mm, AM GoogleMaps P.71615, 1 mature male, 4.8 mm, AM P.71616, 1 immature male, 4.5 mm, AM P.71617 and 296 specimens, AM P.51830, east of Fortescue Bay, north of Hippolyte Rocks , 43°06.70'S 148°03.45'E, 100 m, baited trap, 15.8°C, 17–18 April 1993, J.K. Lowry & P. Freewater, MV GoogleMaps Tasmanian Enterprise , stn TAS-371 ; 163 specimens, AM P.51831, same data, stn TAS-372 ; 1 specimen, AM P.51832, mouth of Fortescue Bay , 43°07.77'S 145°59.47'E, 50 m, baited trap, 8–9 April 1994, J.K. Lowry & K. Dempsey, MV GoogleMaps Martrudan , stn TAS-386 ; 1 specimen, AM P. 58249, east of Fortescue Bay, north of Hippolyte Rocks , 43°06.70'S 148°03.45'E, 100 m, baited trap, 8–9 April 1994, J.K. Lowry & K. Dempsey, MV GoogleMaps Martrudan , stn TAS-389 . South Australia: many specimens, SAM C6950 View Materials and 21 specimens, AM P.85257, Marion Bay, Yorke Peninsula , approx. 35º14'S 136º59'E, 3 m, on dead crayfish in pot, 3 January 1977, W. Zeidler; many specimens, SAM C6951 View Materials GoogleMaps , Marion Bay, Yorke Peninsula , approx. 35°14’S 137°00’E, 6–10 m, bait in craypot, 29 January 1979, W. Zeidler GoogleMaps ; 35 specimens, SAM C6952 View Materials , Marion Bay, Yorke Peninsula , approx. 35º14'S 136º59'E, 15 m, on bait in cray pot, 28 January 1980, W. Zeidler GoogleMaps .

Type locality. About 100 m west of Turners Rock and 80 m offshore, north side of Cape Sorell , Tasmania, Australia, 42°11.5'S 145°10.8'E, 13 m depth GoogleMaps .

Etymology. The species is named for its type locality.

Diagnostic description. Head lateral cephalic lobe rounded, 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 strong 2-field callynophore, robust setae absent from proximal articles; calceoli absent. Antenna 2 peduncular article 3 short; articles 4 and 5 not enlarged; flagellum short, calceoli absent. Epistome/Upper lip separate; epistome produced equally with upper lip, broadly rounded; upper lip slightly produced, straight. Mandible molar with asymmetrically reduced column, proximally setose, distally triturating; palp attached about midway, article 3 with proximal A3-seta. Maxilla 1 outer plate setal-tooth 7 left and right asymmetrical, left cuspidate along most of sinusoidal inner margin, right cuspidate along most of curved inner margin; palp distal margin with apical robust setae. Maxilliped basis without recurved hook; outer plate with 1 short apicolateral robust seta and 3 short apical robust setae.

Gnathopod 1 subchelate; coxa small (length 1.3 x breadth), subtriangular, tapering distally; basis moderately setose along anterior margin; ischium short; carpus long, subequal in length to propodus, without posterior lobe; propodus small, margins subparallel, sparsely setose along posterior margin, palm transverse. Gnathopod 2 palm transverse. 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, not posteroproximally excavate, posterior margin not 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 not projecting over urosomite 2, with anterodorsal notch and rounded boss. Uropods 1 and 2 outer rami with all robust setae stout and striated. 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 deeply cleft, with dorsal robust setae, with 2 apical robust setae on each lobe.

Male (sexually dimorphic characters). Head lateral cephalic lobe subtriangular. Antenna 1 calceoli present, proximal calceolus very large. Antenna 2 peduncular articles 4 and 5 enlarged; flagellum long, calceoli present. Epistome/Upper lip epistome produced beyond upper lip, narrowly rounded. Uropod 3 with plumose setae on both rami.

Remarks. Tryphosella sorell is one of the group of six Australian species with stout striated robust setae on the outer rami of uropods 1 and 2 (see Remarks under T. fortescue ). Only two species, T. freycinet and T. sorell , have all of the robust setae in this form. See Remarks under T. freycinet .

Tryphosella sorell appears to be a widespread shallow-water scavenger in New South Wales, Victoria, Tasmania and South Australia from the subtidal down to 100 m depth (up to about 1085 specimens in a trap).

Distribution. South-eastern and southern Australia, 1.5–100 m depth.

AM

Australian Museum

RV

Collection of Leptospira Strains

MV

University of Montana Museum

R

Departamento de Geologia, Universidad de Chile

T

Tavera, Department of Geology and Geophysics

SAM

South African Museum

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Amphipoda

Family

Tryphosidae

Genus

Tryphosella

Loc

Tryphosella sorell

Lowry, J. K. & Stoddart, H. E. 2011
2011
Loc

Tryphosella sp.

Lowry, J. K. & Smith, S. D. A. 2003: 56
2003