Tmetonyx mucronatus Pirlot, 1936: 275
Barnard, 1958: 100
Barnard, 1962: 30
Tryphosella mucronata
Barnard & Karaman, 1991: 537
The tryphosine genera Photosella gen. nov. and Tryphosella Bonnier, 1893 (Crustacea: Amphipoda: Lysianassoidea: Lysianassidae: Tryphosinae) in Australian waters 2956
Lowry, J. K.
Stoddart, H. E.
Zootaxa
2011
2011-07-08
2956
1
1
76
4GT9N
(Pirlot, 1936)
Pirlot
1936
[151,588,151,177]
Malacostraca
Tryphosidae
Photosella
Animalia
Amphipoda
11
12
Arthropoda
species
mucronata
( Figs 5, 6)
Tmetonyx mucronatus Pirlot, 1936: 275, fig. 108. —J.L. Barnard, 1958: 100. —J.L. Barnard, 1962: 30(key). Tryphosella mucronata. — Barnard & Karaman, 1991: 537.
Typelocality. North-west of Waigeo Island, West New Guinea, Indonesia, 0°3'8''N 130°24'E, 141 mdepth. Material examined.All stations are north-west of Port Hedland, North West Shelf, Western Australiaand were collected by the CSIROon FRV Soela. 1 femaleand 1 male, AMP.71828, 19°56.8'S 117°53.4'Eto 19°56.4'S 117°53.7'E, 42 m, beam trawl, 22 April 1983, stn NWS 02.B2.BT; 6 specimens, AMP.71829, 19°56.9'S 117°53.7'Eto 19°56.4'S 117°53.8'E, 42–43 m, epibenthic sled, 22 April 1983, stn NWS 02.B2.S; 1 specimen, AMP.71830, 19°05.4'S 118°53.3'Eto 19°05.428.2'S 118°54.1'E, 82 m, epibenthic sled, 27 April 1983, stn NWS 02.B4.S; 1 ovigerous female, AMP.71831, 19°56.4'S 117°53.9'Eto 19°56.8'S 117°53.6'E, 44 m, epibenthic sled, 25 June 1983, stn NWS 03.B2.S; 3 specimens, AMP.71832, 19°56.8'S 117°53.5'Eto 19°56.4'S 117°53.9'E, 44 m, beam trawl, 25 June 1983, stn NWS 03.B2.BT; 1 male, AMP.71833, 19°56.6'S 117°54.1'Eto 19°56.3'S 117°53.9'E, 44 m, beam trawl, 26 August 1983, stn NWS 04.B2.BT; 1 male, AMP.71834, 19°56.7'S 117°53.6'Eto 19°56.4'S 117°54.0'E, 41 m, epibenthic sled, 26 October 1983, stn NWS 05.B2.S; 1 male, AMP.71835, 19°29.7'S 118°52.0'Eto 19°29.4'S 118°52.5'E, 39 m, epibenthic sled, 25 October 1983, stn NWS 05.D3.S; 1 female, AMP.71836, 19°29.6'S 118°51.7'Eto 19°29.9'S 118°51.0'E, 40–41 m, epibenthic sled, 25 October 1983, stn NWS 05.D7.S; 1 male, AMP.71837, 19°04.1'S 118°47.8'Eto 19°04.7'S 118°47.2'E, 82 m, beam trawl, 23 October 1983, stn NWS 05.B10.BT. Diagnostic description. Headlateral cephalic lobe subtriangular, apically rounded; eyes (fading in alcohol), large, subtriangular with ventral concave lens. Antenna 1flagellum with strong 2-field callynophore, robust setae absent from proximal articles; calceoli absent. Antenna 2peduncular articles 4 and 5 not enlarged; flagellum short, calceoli absent. Epistome/Upper lipepistome less produced than upper lip, straight. Mandiblemolar with asymmetrically reduced column, proximally setose, distally triturating. Maxilla 1setal-tooth 7, left and right symmetrical, cuspidate along most of straight inner margin; palp distal margin with apical robust setae. Maxillipedouter plate with 2 short apical robust setae. Gnathopod 1subchelate; coxa large (length 1.9 x breadth), subrectangular, distally subovate; basis moderately setose along anterior margin; ischium short (length 1.6 x breadth); carpus long (length 2 x breadth), shorter than propodus, without posterior lobe; propodus margins subparallel, palm moderately acute. Gnathopod 2propodus palm moderately obtuse. Pereopod 4coxa without distinct lateral ridge. Pereopod 5coxa with distinct lateral ridge; basis about as long as broad, with photophore. Epimeron 3posterior margin smooth, posteroventral corner broadly rounded. Uropod 3outer ramus article 2 short, with plumose setae on both rami. Telsondeeply cleft, with dorsal robust setae, with 2 to 3 apical robust setae on each lobe. Male(sexually dimorphic characters). Antennae 1 and 2calceoli present. Antenna 2peduncular articles 4 and 5 enlarged.
Remarks.When Pirlot first described this species he recognised its similarity to the species now known as Photosella miersibut noted the lack of a ridge on coxa 5 of Stebbing's species. Photosella mucronatadiffers from P. miersiin having a ridge on the coxa of pereopod 5. In Australiait is currently known only from the North West Shelf of Western Australia.
Distribution.Eastern Indonesiaand north-western Australia, 39–141 mdepth.
[151,1350,355,380]
Guinea-Bissau
141
0.052222222
North-west of Waigeo Island
925
130.4
West New
11
12
1
holotype
1983-04-22
AM
42
-19.94
126
117.895
11
12
2
1
1
1983-04-22
AM
43
-19.94
126
117.89667
11
12
6
1983-04-27
1983-06-25
1983-04-27
AM
82
-19.946667
126
117.89333
11
12
1
1983-06-25
AM
44
-19.94
126
117.89833
11
12
3
1983-08-26
AM
44
-19.938334
126
117.89833
11
12
1
1
1983-10-26
AM
41
-19.94
126
117.9
11
12
1
1
1983-10-25
AM
39
-19.49
127
118.875
11
12
1
1
1983-10-25
AM
41
-19.498333
127
118.85
11
12
1
1
1983-10-23
AM
82
-19.078333
127
118.78667
11
12
1
1