Tryphosella flynnana Lowry &amp; Stoddart 2009, sp. nov.
Creators: name: Lowry, J. K.
name: Stoddart, H. E.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Tryphosidae
Tryphosella
Tryphosella flynnana

description: <i>Tryphosella flynnana</i> sp. nov. (Figs 19, 20) <b>Type material.</b> Holotype, female, ovigerous (2 eggs), 5.0 mm, AM P69587, east of Flynn Reef, Queensland, Australia (16°41.61'S 146°17.94'E), baited trap, 50 m, 25.9 ° C, J.K. Lowry &amp; K. Dempsey on RV <i>Sunbird</i>, 18–19 May 1994 (QLD 1032). Paratypes: ovigerous female, 4.5 mm, AM P69588; male, 4.2 mm, AM P69589; 903 unsexed, AM P52150; same station data as holotype. <b>Additional material examined.</b> 2 unsexed, AM P69590 (PNG 51); 47 unsexed, AM P49506 (QLD 916); 16 unsexed, AM P50366 (QLD 918); 93 unsexed, AM P50198 (QLD 919); 382 unsexed, AM P50249 (QLD 933); 105 unsexed, AM P50208 (QLD 935); 38 unsexed, AM P50374 (QLD 937); 22 unsexed, AM P50375 (QLD 938); 78 unsexed, AM P57615 (QLD 1034); 312 unsexed, AM P50341 (QLD 1052); 377 unsexed, AM P52250 (QLD 1054); 129 unsexed, AM P50346 (QLD 1055); 53 unsexed, AM P50350 (QLD 1057). <b>Type locality.</b> East of Flynn Reef, Great Barrier Reef, Queensland, Australia (16°41.61'S 146°17.94'E), 50 m depth. <b>Etymology.</b> Named for Flynn Reef, near the type locality. <b>Description.</b> Based on holotype female, 5.0 mm, AM P69587 and paratype female, 4.5 mm, AM P69588. <b>Head and body.</b> <i>Body</i> without dorsal carina. <i>Head</i> lateral cephalic lobes semidome, with apically rounded margins. <i>Antenna 1</i> subequal in length to antenna 2; flagellum with strong 2-field callynophore, robust setae absent from proximal articles; calceoli absent; accessory flagellum with 4 articles. <i>Antenna 2</i> less than 40% of body length; peduncular articles 3 to 5 not enlarged, without brush setae; calceoli present. <i>Mouthparts</i> forming a subquadrate bundle. <i>Epistome</i> produced beyond upper lip, broadly rounded. <i>Mandible</i> molar with asymmetrically reduced column, proximally setose, distally triturating; palp attached midway, article 3 with proximal A3-seta. <i>Maxilla 1</i> outer plate with setal-teeth in 6/5 arrangement; setal-tooth 7, left and right symmetrical, cuspidate along all of sinsusoidal inner margin; palp distal margin with apical robust setae. <i>Maxilliped</i> inner plates well developed, about half the length of outer plate; outer plate with 2 long, slender apical robust setae; palp 4–articulate, article 4 well developed. <b>Pereon.</b> <i>Gnathopod 1</i> subchelate; coxa reduced, significantly shorter than coxa 2, tapering distally; basis sparsely setose along anterior margin; ischium long length (2.3 x breadth); carpus long (length 2.5 x breadth), longer than (1.2 x) propodus, without posterior lobe; propodus longer than broad, margins subparallel, palm acute; dactylus inner face serrated. <i>Gnathopod 2</i> chelate; carpus much longer than (2.3 x) propodus; palm slightly obtuse; dactylus minute. <i>Pereopod 4</i> coxa with well developed posteroventral lobe. <i>Pereopod 5</i> coxa equilobate; basis about as long as broad, posterior margin not strongly serrated, with well developed rounded posteroventral lobe. <i>Pereopod 7</i> basis posterodistally produced less than halfway along merus, posterior margin slightly serrated. <b>Pleon.</b> <i>Epimeron 3</i> posterior margin smooth, posterodistal corner acute. <i>Urosomite 1</i> with anterodorsal notch and slightly rounded boss. <i>Uropod 1</i> rami subequal. <i>Uropod 2</i> rami subequal, inner ramus without marginal constriction. <i>Uropod 3</i> without plumose setae on rami; outer ramus 2-articulate, article 2 long (about 0.5 x article 1); inner ramus extending beyond article 1 of outer ramus. <i>Telson</i> longer than broad, deeply cleft, with dorsal robust setae, with 1 apical robust seta on each lobe. <b>Male</b> (sexually dimorphic characters). Based on paratype male AM P69589. <i>Antenna 1</i> flagellum with stronger 2-field callynophore; calceoli present. <i>Antenna 2</i> about half length of body; peduncular articles 4 and 5 with brush setae; calceoli present. <i>Epistome</i> more produced and broadly rounded. <i>Uropod 3</i> with plumose setae on both rami. <b>Habitat</b>. Soft bottoms in 10 to 100 m depth. <b>Remarks.</b> <i>Tryphosella flynnana</i> is very similar to <i>T. wongada</i> Lowry &amp; Stoddart, 1995, from Madang Lagoon in northern Papua New Guinea. However in <i>T. flynnana</i> antenna 1 is shorter than antenna 2 (subequal in <i>T. wongada</i>); <i>T. flynnana</i> has no robust setae on the proximal articles of antenna 1 (present in <i>T. wongada</i>); <i>T. flynnana</i> has 2 apical robust setae on the outer plate of the maxilliped (1 robust seta in <i>T. wongada</i>). The two species appear to live in different habitats: <i>T. flynnana</i> on the continental shelf down to about 100 m and <i>T. wongada</i> in a lagoon system in less than 20 m depth. <i>Tryphosella flynnana</i> is also similar to <i>T. astrolabensis</i> Lowry &amp; Stoddart, 1995 from Astrolabe Bay in northern Papua New Guinea. However <i>T. astrolabensis</i> has more rounded lateral cephalic lobes than does <i>T. flynnana</i>, antenna 1 is subequal to antenna 2 in males and the posterodistal corner of epimeron 3 is produced into a small spine. <i>Tryphosella flynnana</i> lives on the inner continental shelf between 50 and 100 m depth, but <i>T. astrolabensis</i> has a wider depth range living on the continental shelf and slope from 90 to at least 500 m depth. <b>Distribution</b>. <i>Australia</i>. Queensland: east of Flynn Reef (current study). <i>Papua New Guinea</i>. Bootless Bay (current study).
description: Published as part of <i>Lowry, J. K. &amp; Stoddart, H. E., 2009, Lysianassidae *, pp. 561-597 in Zootaxa 2260 (1)</i> on pages 590-593, DOI: 10.11646/zootaxa.2260.1.31, http://zenodo.org/record/5308147
description: {"references": ["Lowry, J. K. &amp; Stoddart, H. E. (1995) The Amphipoda (Crustacea) of Madang Lagoon: Lysianassidae, Opisidae, Uristidae, Wandinidae and Stegocephalidae. Records of the Australian Museum, Supplement, 22, 97 - 174."]}