Euonyx xarifa, Lowry & Kilgallen, 2014

Lowry, J. K. & Kilgallen, N. M., 2014, A generic review of the lysianassoid family Uristidae and descriptions of new taxa from Australian waters (Crustacea, Amphipoda, Uristidae), Zootaxa 3867 (1), pp. 1-92 : 25-28

Euonyx xarifa sp. nov.

( Figs 13–15 )

Types. Holotype, female, 10.7 mm, AM P.68882, east of Cape York , Queensland, Australia (11°35.62’S 145°28.42’E), 1770–1863 m, epibenthic sled, 22 August 1988, P.A. Hutchings et al., RV Franklin [FR0688-14] . Paratype, male, 8.5mm, AM P.68883, same collection details as holotype .

Type locality. East of Cape York , Queensland, Australia (11°35.62’S 145°28.42’E), 1770–1863 m east of Cape York , Queensland, Australia (11°35.62’S 145°28.42’E), 1770–1863 m .

Etymology. Named for the pearling lugger ‘Xarifa’ one of the fleet wrecked off Cape York (probably Thursday Island) during the severe cyclone Mahine on 4 March 1899; used as a noun in apposition.

Description. Based on holotype, female, 10.7 mm, AM P.68882. Head lateral cephalic lobes small, rounded; eyes apparently absent. Antenna 1 peduncular article 1 without anterodistal lobe; accessory flagellum with an elongate article 1 (at least twice as long as article 2) partially covering callynophore, 4-articulate, terminal article large, offset; primary flagellum with strong 2-field callynophore; calceoli absent. Antenna 2 peduncular article 3 short; articles 3 to 5 not enlarged, brush setae absent; flagellum short; calceoli absent. Labrum, epistome and upper lip separate. Mandible incisor very reduced, left and right slightly asymmetrical; molar an asetose flap; palp attached distally, article 2 with central bulge. Maxilla 1 outer plate setal-tooth 7 present, not cuspidate; palp distal margin with apical robust setae. Maxilliped outer plate without apical robust setae.

Gnathopod 1 chelate; coxa vestigial, significantly shorter than coxa 2, subquadrate; basis sparsely setose along anterior margin; ischium long (length 2 × to 4 × breadth); carpus long (length 2 to 4 × breadth), longer than propodus, without posterior lobe; propodus margins subparallel, palm obtuse, entire, slightly convex; dactylus simple. Gnathopod 2 propodus palm slightly acute. Pereopod 4 coxa with a well-developed posteroventral lobe. Pereopod 5 coxa without distinct lateral ridge; basis broader than long, posterior margin weakly or not serrate. Pereopod 7 basis posterodistally produced 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 subquadrate. Urosomite 1 not projecting over urosomite 2, with rounded boss. Uropod 2 inner ramus without constriction. Peduncle without dorsolateral flange; outer ramus article 2 short, without plumose setae on rami. Telson deeply cleft , or moderately cleft.

Depth range. 1770–1863 m.

Remarks. See remarks under E. chelatus .

Distribution. Australia. Queensland.

Figures

FIGURE 13. Euonyx xarifa sp. nov., holotype, female, 10.7 mm, AM P.68882, from east of Cape York, Queensland, Australia.

FIGURE 14 Euonyx xarifa sp. nov., holotype, female, 10.7 mm, AM P.68882; paratype, male 8.5 mm, AM P.68883, from east of Cape York, Queensland, Australia. Scale bars: 0.2 mm.

FIGURE 15. Euonyx xarifa sp. nov., holotype, female, 10.7 mm, AM P.68882, from east of Cape York, Queensland, Australia. Scale bars: 0.5 mm.