Tryphosella cameloides, Lowry & Stoddart, 2009

Lowry, J. K. & Stoddart, H. E., 2009, Lysianassidae *, Zootaxa 2260 (1), pp. 561-597 : 584-586

publication ID

https://doi.org/ 10.11646/zootaxa.2260.1.31

persistent identifier

https://treatment.plazi.org/id/03FCB50C-B909-9703-FF16-82BF9FDEFF57

treatment provided by

Felipe

scientific name

Tryphosella cameloides
status

sp. nov.

Tryphosella cameloides View in CoL sp. nov.

( Figs 15 View FIGURE 15 , 16 View FIGURE 16 )

Tryphosella sp. 1 . — Keable, 1995: 42.

Type material. Holotype, female, ovigerous (3 eggs), 3.5 mm, AM P69362, Blue Lagoon between South and Palfrey Islands, Lizard Island, Queensland, Australia (14°40'S 145°28'E), very exposed, bare consolidated reef flat with boulders 30–40 cm in diameter, very few branching hard corals, occasional patch of soft corals, mainly Sarcophyton , baited trap, 0.5 m, S.J. Keable & D.J. Townsend, 25-26 June 1989 ( QLD 429 ) GoogleMaps . Paratypes: 1 male, 3.0 mm, AM P69363 ; 1 male, 2.8 mm, AM P69364; 35 unsexed, AM P69365, same station data as holotype GoogleMaps .

Additional material examined. 1 unsexed, AM P69371 ( BK 126); 1 unsexed, AM P69372 ( BK 131); 1 unsexed, AM P69368 ( JDT / LIZ 15); 1 unsexed, AM P69370 ( JDT / LIZ 17); 1 unsexed, AM P69369 ( JDT / LIZ 19); 1 unsexed, AM P69373 ( JDT / OPH 1); 1 unsexed, AM P69352 ( QLD 291); 1 unsexed, AM P69353 ( QLD 311); 1 unsexed, AM P69354 ( QLD 323); 1 unsexed, AM P69355 ( QLD 325); 2 unsexed, AM P69356 ( QLD 372); 8 unsexed, AM P69357 ( QLD 374); 1 unsexed, AM P69358 ( QLD 379); 1 unsexed, AM P69359 ( QLD 396); 7 unsexed, AM P69360 ( QLD 401); 1 unsexed, AM P69361 ( QLD 427); 3 unsexed, AM P69366 ( QLD 481); 1 unsexed, AM P69367 ( QLD 575); 5 unsexed, P69351 ( QLD 631); 3 unsexed, AM P69350 ( QLD 673); 1 unsexed, AM P69349 ( QLD 746); 4 unsexed, AM P69346 ( QLD 763); 1 unsexed, AM P69347 ( QLD 764); 1 unsexed, AM P69348 ( QLD 767); 1 unsexed, P71934 ( QLD 1364); 1 unsexed, P70775 ( QLD 1653); 2 unsexed, ( SEL /LZI-1-2); 3 unsexed ( SEL /LZI-2-1); 1 unsexed ( SEL /LZI-2-7).

Type locality. Blue Lagoon between South and Palfrey Islands, Lizard Island, Queensland, Australia (14°40'S 145°28'E), 0.5 m depth GoogleMaps .

Etymology. The name cameloides indicates the close similarity to Tryphosella camela ( Stebbing, 1910) .

Description. Based on holotype female, 3.5 mm, AM P69362.

Head and body. Body without dorsal carina. Head lateral cephalic lobes rounded, with apically rounded margins. Antenna 1 subequal to antenna 2; with weak 2-field callynophore, robust setae absent from proximal articles; calceoli absent; accessory flagellum with 3 articles. Antenna 2 less than 40% of body length; peduncular articles 3 to 5 not enlarged, without brush setae; calceoli absent. Mouthparts forming a subquadrate bundle. Epistome produced beyond upper lip, narrowly rounded. Mandible molar with asymmetrically reduced column, proximally setose, distally triturating; palp attached midway, article 3 with proximal A3-seta. Maxilla 1 outer plate with setal-teeth in 6/5 arrangement; setal-tooth 7, left and right symmetrical, cuspidate along most of sinsusoidal inner margin; palp distal margin with apical robust setae. Maxilliped inner plates well developed, about half the length of outer plate; outer plate with 3 short, slender apical robust setae; palp 4–articulate, article 4 well developed.

Pereon. Gnathopod 1 subchelate; coxa slightly reduced, slightly shorter than coxa 2, tapering distally; basis sparsely setose along anterior margin; ischium short (length 1.7 x breadth); carpus long (length 2.3 x breadth), subequal in length to propodus, without posterior lobe; propodus longer than broad, margins subparallel, palm slightly acute; dactylus inner face serrated. Gnathopod 2 chelate; carpus 1.5 x length of propodus; palm slightly obtuse; dactylus minute. Pereopod 4 coxa with well developed posteroventral lobe. Pereopod 5 coxa equilobate; basis about as long as broad, posterior margin not strongly serrated. Pereopod 7 basis posterior margin slightly serrated.

Pleon. Epimeron 3 posterior margin smooth, posterodistal corner subquadrate. Urosomite 1 with deep notch and subtriangular, subacute boss. Uropod 1 rami subequal. Uropod 2 rami subequal, inner ramus without marginal constriction. Uropod 3 rami distinctly unequal, without plumose setae; outer ramus 2- articulate, article 2 long (about 0.5 x article 1); inner ramus not extending beyond article 1 of outer ramus. Telson distinctly longer than broad, deeply cleft, with dorsal robust setae, with 1 apical robust seta on each lobe.

Male (sexually dimorphic characters). Based on paratype male, 3 mm, AM P69363. Head lateral cephalic lobes semidome, with apically truncated margins. Antenna 1 flagellum with strong 2-field callynophore; calceoli present. Antenna 2 about half body length; calceoli present. Epistome produced beyond upper lip (more so than in female). Uropod 3 with a few plumose setae on each ramus.

Habitat. Scavenger living on sand patches among corals on reef top and in coral rubble on reef slopes from the intertidal to 30 m depth.

Remarks. Tryphosella cameloides is most similar to T. camela ( Stebbing, 1910) . Tryphosella camela has not been redescribed, but we have examined new material. In T. cameloides the gnathopod 2 palm is slightly obtuse (transverse in T. camela ). Both species have a distinctive subtriangular, subacute boss on urosomite 1. In T. cameloides the boss is laterally very thin whereas in T. camela it is more robust and is preceded by a very deep incision. The two species also differ slightly in the shape of the basis of pereopods 5 to 7.

Distribution. Australia. Queensland: Lizard Island; Eagle Island; Orpheus Island; Boot Reef; Great

Detached Reef; Ashmore Reef (all current study).

AM

Australian Museum

BK

Department of Agriculture

SEL

Marie Selby Botanical Gardens

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Amphipoda

Family

Tryphosidae

Genus

Tryphosella

Loc

Tryphosella cameloides

Lowry, J. K. & Stoddart, H. E. 2009
2009
Loc

Tryphosella sp. 1

Keable, S. J. 1995: 42
1995
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