Paralysianopsis capricornia Lowry & Kilgallen 2014
- Dataset
- New tryphosine amphipods from Australian waters (Crustacea, Amphipoda, Lysianassoidea, Lysianassidae, Tryphosinae)
- Rank
- SPECIES
- Published in
- Lowry, J. K., Kilgallen, N. M. (2014): New tryphosine amphipods from Australian waters (Crustacea, Amphipoda, Lysianassoidea, Lysianassidae, Tryphosinae). Zootaxa 3844 (1): 1-64, DOI: 10.11646/zootaxa.3844.1.1
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Malacostraca
- order
- Amphipoda
- family
- Tryphosidae
- genus
- Paralysianopsis
- species
- Paralysianopsis capricornia
description
(Figs 17 – 19) Types. Holotype, female, 3.6 mm, AM P. 70543, east of Fitzroy Reef, Queensland, Australia (23 ° 32.53 ’ S 152 ° 16.45 ’ E), 105 m, baited trap, 16 June 1993 – 17 June 1993, J. K. Lowry, P. Freewater & R. T. Springthorpe, MV Reefknot stn QLD- 954 / SEAS. Paratypes: 1 male, 2.4 mm, AM P. 71608; 6 specimens, 2.9 – 4.2 mm, AM P. 49695; 1 specimen, AM P. 57642, 2.4 mm, east of Fitzroy Reef, Queensland, Australia (23 ° 32.53 ’ S 152 ° 16.45 ’ E), 105 m, baited trap, 16 June 1993 – 17 June 1993, J. K. Lowry, P. Freewater & R. T. Springthorpe, MV Reefknot stn QLD- 954 / SEAS; 1 male, 3.6 mm, AM P. 71609; 28 specimens, 2.4 – 3.6 mm, AM P. 57643, east of Fitzroy Reef, Queensland, Australia (23 ° 32.53 ’ S 152 ° 16.45 ’ E), 105 m, baited trap, 16 June 1993 – 17 June 1993, J. K. Lowry, P. Freewater & R. T. Springthorpe, MV Reefknot stn QLD- 955 / SEAS.
description
Description. Based on holotype, female, ~ 3.6 mm, AM P. 70543. Head lateral cephalic lobe broadly rounded; eyes oval to irregular. Antenna 1 accessory flagellum not forming operculum; primary flagellum with weak 2 - field callynophore, robust setae absent from proximal articles; calceoli absent. Antenna 2 peduncle weakly geniculate between articles 3 – 4; article 3 short; articles 3 to 5 not enlarged, brush setae absent; flagellum short, calceoli absent. Labrum, epistome and upper lip separate; epistome not produced, concave; upper lip slightly produced in front of epistome, rounded. Mandible molar weakly setose with a vestigial triturating surface. Maxilla 1 outer plate setal-tooth 7 present, left and right symmetrical, cuspidate distally; palp distal margin serrate / rugose, without apical robust setae. Maxilliped outer plate apical robust setae absent. Pereonites 1 – 7 dorsally smooth. Gnathopod 1 subchelate; coxa large, about as long as coxa 2, subrectangular with straight anterior margin; basis not setose along anterior margin; ischium short; carpus compressed, shorter than propodus, without posterior lobe; propodus large, not setose along posterior margin, palm transverse to slightly acute, irregular, with disk-like process on posterodistal corner. Gnathopod 2 minutely chelate; propodus palm transverse, convex. Pereopod 5 basis about as long as broad, not posteroproximally excavate, posterior margin weakly serrate. Pereopod 7 basis posterodistally produced to 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 with slight notch dorsally. Uropod 2 inner ramus with slight constriction. Uropod 3 inner and outer rami well developed, outer ramus article 2 long, without plumose setae on rami. Telson entire, longer than wide, apically truncate, without robust setae. Sexually dimorphic characters. Antenna 1 with strong 2 - field callynophore. Antenna 2 peduncle articles 4 and 5 elongate. Gnathopod 1 propodus longer than gnathopod 1 of female, palm with strong, posteromedial robust seta.
discussion
Remarks. Gnathopod 1 of P. capricornia differs from all other Paralysianopsis in having a carpus that is nearly compressed and a very broad, strongly subchelate propodus that bears an unusual disk-like process into which the tip of the dactylus appears to close. All other characters fit the diagnosis for Paralysianopsis. Depth range. 58 – 105 m.
distribution
Distribution. Australia. Great Barrier Reef, Queensland.
etymology
Etymology. The specific epithet “ capricornia ” refers to Capricornia Cays National Park, which includes Fitzroy Reef, the type locality; used as a noun in apposition.
materials_examined
Additional material examined. Queensland. 1 specimen, AM P. 57749, east of Flynn Reef (16 ° 41.32 ’ S 146 ° 18.27 ’ E), 100 m, baited trap, 06 June 1993 – 07 June 1993, J. K. Lowry, P. Freewater, W. Vader, RV Sunbird stn QLD- 919 / SEAS; 3 specimens, AM P. 51125, east of Fitzroy Reef (23 ° 34.82 ’ S 152 ° 11.77 ’ E), 58 m, baited trap, 3 June 1994 – 4 June 1994, J. K. Lowry & K. Dempsey, MV Reefknot stn QLD- 1091; 1 specimen, AM P. 57748, east of Flynn Reef (16 ° 41.32 ’ S 146 ° 18.27 ’ E), 100 m, baited trap, 6 June 1993 – 7 June 1993, J. K. Lowry, P. Freewater, W. Vader, RV Sunbird stn QLD- 918 / SEAS; 3 specimens, AM P. 50756, east of Fitzroy Reef (23 ° 32.47 ’ S 152 ° 16.45 ’ E), 58 m, baited trap, 2 June 1994 – 3 June 1994, J. K. Lowry & K. Dempsey, MV Reefknot stn QLD- 1073; 1 specimen, AM P. 51118, east of Fitzroy Reef (23 ° 34.92 ’ S 152 ° 11.77 ’ E), 58 m, baited trap, 16 June 1993 – 17 June 1993, J. K. Lowry, P. Freewater, R. T. Springthorpe, MV Reefknot stn QLD- 953 / SEAS; 5 specimens, AM P. 71610, east of Fitzroy Reef (23 ° 32.47 ’ S 152 ° 16.45 ’ E), 100 m, baited trap, 2 June 1994 – 3 June 1994, J. K. Lowry & K. Dempsey, MV Reefknot stn QLD- 1076; 39 specimens, AM P. 50764, east of Fitzroy Reef (23 ° 32.47 ’ S 152 ° 16.45 ’ E), 100 m, baited trap, 3 June 1994 – 4 June 1994, J. K. Lowry & K. Dempsey, MV Reefknot stn QLD- 1096; 8 specimens, AM P. 58238, east of Fitzroy Reef (23 ° 32.47 ’ S 152 ° 16.45 ’ E), 100 m, baited trap, 2 June 1994 – 3 June 1994, J. K. Lowry & K. Dempsey, MV Reefknot stn QLD- 1078; 15 specimens, AM P. 49629, east of Fitzroy Reef (23 ° 32.47 ’ S 152 ° 16.45 ’ E), 100 m, baited trap, 2 June 1994 – 3 June 1994, J. K. Lowry & K. Dempsey, MV Reefknot stn QLD- 1078. Type locality. East of Fitzroy Reef, Queensland, Australia (23 ° 32.53 ’ S 152 ° 16.45 ’ E), 105 m.