Tryphosella bicheno, 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 : 21-23

publication ID

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

persistent identifier

https://treatment.plazi.org/id/DC2F87F6-F619-FF86-A69E-F8F3B91EF87C

treatment provided by

Felipe

scientific name

Tryphosella bicheno
status

sp. nov.

Tryphosella bicheno sp. nov.

( Figs 10–12 View FIGURE 10 View FIGURE 11 View FIGURE 12 )

Tryphosella sp. 168/182. — Lowry & Smith, 2003: 56.

Type material. HOLOTYPE, female, 7.0 mm, P.70514, east of Fortescue Bay , Tasmania, Australia, 43°8.96'S 145°15.36'E, 1000 m, baited trap, 5.1°C, 17–18 April 1993, J.K. Lowry & P. Freewater, MV Tasmanian Enterprise, stn TAS-384 GoogleMaps . PARATYPES: 1 female, 7.2 mm, AM P.70513; 1 male, 7.5 mm, AM P.70515; 1 male, 6.4 mm, AM P.70516; 1 female, 4.6 mm, AM P.70517; 1 male, 4.6 mm, AM P.70518; 1?female, 4.2 mm, AM P.70519; 1?male, 4.1 mm, AM P.70520; 1 female, 7.8 mm, AM P.70521; 2242 specimens, P.51935; all with same data as Holotype. 1611 specimens, P.51934, same data, stn TAS-383 GoogleMaps ; 21 specimens, P.51928, same data, 16–17 April 1993, stn TAS- 365 GoogleMaps ; 69 specimens, P.51929, same data, stn TAS-367 GoogleMaps .

Additional material examined. Queensland: 5 specimens, P.58073, east of Flynn Reef , 16°41.61’S 146°17.94’E, 100 m, baited trap, 6–7 June 1993, J.K. Lowry, P. Freewater & W. Vader, RV GoogleMaps Sunbird , stn QLD-918 ; 8 specimens, P.58071, same data, stn QLD-936 ; 971 specimens, P.57744, same locality, 50 m, baited trap, 18–19 May, 1994 J.K. Lowry & K. Dempsey, RV Sunbird , stn QLD-1033 . New South Wales: 1 specimen, P.44409, off Wollongong , 34°32.53'S 151°17.07'E, 400 m, baited trap, 6–7 May 1993, P. Freewater, S. Keable & W. Vader, MV GoogleMaps Robin E, stn NSW-787; 4 specimens, P.44435 and 1 specimen, P.44446, off Wollongong , 34°32.39'S 151°15.00'E, 300 m, baited trap, 7–8 May 1993, P. Freewater, S. Keable & W. Vader, MV GoogleMaps Robin E, stn NSW-802; 2 specimens, P.44420, off Wollongong , 34°33.01'S 151°16.54'E, 400 m, baited trap, 7–8 May 1993, P. Freewater, S. Keable & W. Vader, MV GoogleMaps Robin E, stn NSW-804. Tasmania: 4 specimens, MV J62304 View Materials , off Freycinet Peninsula , 41°58.60'S 148°38.80'E, 500 m, coarse shell, WHOI GoogleMaps epibenthic sled, M.F. Gomon et al., 27 July 1986, RV Franklin , stn SLOPE 47 ; 4 specimens, P.51936, mouth of Fortescue Bay , 43°07.77'S 145°59.47'E, 50 m, baited trap, 16.6°C, 8– 9 April 1994, J.K. Lowry & K. Dempsey, MV GoogleMaps Martrudan , stn TAS-387 ; 33 specimens, P.57706, east of Fortescue Bay, north of Hippolyte Rocks , 43°6.70'S 148°03.45'E, 100 m, baited trap, 17–18 April 1993, J.K. Lowry & P. Freewater, MV GoogleMaps Tasmanian Enterprise , stn TAS-372 ; 2 specimens, P.52239 and 12 specimens, P.58241, same locality, 100 m, baited trap, 8–9 April 1994, 15.6°C, J.K. Lowry & K. Dempsey on MV Martrudan , stn TAS-389 ; 3 specimens, P.57704, east of Fortescue Bay , 43°06.70'S 145°13.6'E, 200 m, baited trap, 16–17 April 1993, J.K. Lowry & P. Freewater, 16–17 April 1993, MV GoogleMaps Tasmanian Enterprise , stn TAS-356 ; 2 specimens, P.57705, same data, stn TAS-357 ; 1 specimen, P.57707, same data, 17–18 April 1993, stn TAS-376 ; 7 specimens, P.51937 and 17 specimens, P.57711, same locality, 200 m, baited trap, 13.2° C, J.K. Lowry & K. Dempsey, MV Martrudan , 8–9 April 1994, stn TAS-392 ; 1 specimen, P.51938, same data, stn TAS-393 ; 30 specimens, P.51226, same data, stn TAS-394 ; 1 specimen, P.51944, same data, 9–10 April 1994, stn TAS-412 ; 64 specimens, P.51925, east of Fortescue Bay , 43°09.37'S 145°13.6'E, 300 m, baited trap, 16–17 April 1993, J.K. Lowry & P. Freewater, 16–17 April 1993, MV GoogleMaps Tasmanian Enterprise , stn TAS-359 ; 30 specimens, P.51926, same data, stn TAS-361 ; 11 specimens, P.51930, same data, 17–18 April 1993, stn TAS-377 ; 3 specimens, P.51931, same data, stn TAS-378; 1414 specimens, P.51939, same locality, 300 m, baited trap, 11.0° C, J.K. Lowry & K. Dempsey, MV Martrudan , 8–9 April 1994, stn TAS-395 ; 758 specimens, P.51235, same data, stn TAS-396 ; 459 specimens, P.51940, same data, stn TAS-397 ; 274 specimens, P.51945, same data, 9–10 April 1994, stn TAS-414 ; 247 specimens, P.51946, same data, stn TAS-415; 1269 specimens, P.51022, east of Fortescue Bay , 43°07.36'S 145°13.75'E, 400 m, baited trap, 16–17 April 1993, J.K. Lowry & P. Freewater, 16–17 April 1993, MV GoogleMaps Tasmanian Enterprise , stn TAS-362; 1707 specimens, P.51927, same data, stn TAS-364; 1003 specimens, P.51932, same data, 17–18 April 1993, stn TAS-380 GoogleMaps ; 234 specimens, P.51933, same data, stn TAS-382 GoogleMaps ; 537 specimens, P.51941, same locality, 400 m, baited trap, 10.0° C, J.K. Lowry & K. Dempsey, MV GoogleMaps Martrudan , 8–9 April 1994, stn TAS-398 ; 885 specimens, P.51942, same data, stn TAS-399; 1457 specimens, P.51943, same data, stn TAS-400; 1337 specimens, P.51947, same data, 9–10 April 1994, stn TAS-417; 1531 specimens, P.51948 and 1 specimen, P.71633, same data, stn TAS-418 .

Type locality. East of Fortescue Bay , Tasmania, Australia, 43°08.96'S 14515.36'E, 1000 m depth .

Etymology. The species is named for the town of Bicheno on the east coast of Tasmania.

Diagnostic description. Head lateral cephalic lobe a semidome, apically rounded; eyes lageniform but fading completely in alcohol. 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 present on 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 beyond 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 slightly 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 long apicolateral seta and 3 long apical robust setae.

Gnathopod 1 subchelate; coxa small (length 1.3 x breadth), subtriangular, tapering distally; basis moderately setose along anterior margin; ischium long; carpus long, longer than propodus, without posterior lobe; propodus small, margins subparallel, sparsely setose along posterior margin, palm moderately acute, entire, straight. 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, 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 acutely produced. Urosomite 1 not projecting over urosomite 2, with anterodorsal notch and rounded 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 2 short apicomedial robust setae; inner and outer rami well developed, outer ramus article 2 short, without plumose setae on rami. Telson deeply cleft, with dorsal robust setae, with 1 apical robust seta on each lobe.

Male (sexually dimorphic characters). Head lateral cephalic lobe subtriangular. Antenna 1 calceoli present, small. Antenna 2 flagellum long, calceoli present. Uropod 3 with plumose setae on both rami.

Remarks. Tryphosella bicheno appears to be most similar to T. astrolabensis and T. wongada (both from northern Papua New Guinea). They all have a long ischium on gnathopod 1, robust setae on the proximal articles of antenna 1 flagellum, an acutely produced posteroventral corner on epimeron 3 and a rounded boss on urosomite 1. Tryphosella bicheno differs from T. astrolabensis and T. wongada in having 1 long apicolateral and 3 long apical setae on the maxilliped outer plate, a transverse palm on gnathopod 2 and only 1 apical robust seta on each lobe of the telson.

Tryphosella bicheno is a scavenger along the east coast of Australia. It occurred in 50 to 100 m depth off the Great Barrier Reef (up to 970 specimens in a trap) and in small numbers off the New South Wales central coast in 300 to 400 m depth (up to 5 specimens in a trap). Off the Tasmanian coast it occurred in small numbers from 50 to 200 m depth (up to 65 specimens in a trap), but most frequently and in the highest numbers in depths from 300 to 1000 m (up to 2250 specimens in a trap) .

Distribution. Queensland to Tasmania, eastern Australia; 50–1000 m depth.

MV

University of Montana Museum

AM

Australian Museum

RV

Collection of Leptospira Strains

WHOI

Woods Hole Oceanographic Institution

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Amphipoda

Family

Tryphosidae

Genus

Tryphosella

Loc

Tryphosella bicheno

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

Tryphosella sp.

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