Euonyx urania Lowry & Kilgallen, 2014, sp. nov.

Euonyx urania sp. nov.

(Figs 10–12)

Types. Holotype, female, 19.0 mm, AM P.68881, east of Broken Bay, New South Wales, Australia (33°35.0’S 152°05.0’E to 37°37.0’S 152°05.0’E), 1144 m, dredge 10 December 1980, FRV Kapala [K80-20-10].

Type locality. East of Broken Bay, New South Wales, Australia (33°35.0’S 152°05.0’E to 37°37.0’S 152°05.0’E), 1144 m depth.

Etymology. Named for the sailing vessel Urania lost off the central New South Wales coast in December 1876; used as a noun in apposition.

Description. Based on holotype, female, 19.0 mm. Head, lateral cephalic lobe subtriangular, apically acute and slightly upturned; eyes apparently absent. Antenna 1 peduncular article 1 with well-developed anterodistally rounded lobe; accessory flagellum with an elongate article 1 (at least twice as long as article 2) partially covering callynophore, 6-articulate, terminal article not offset; primary flagellum with strong 2-field callynophore; robust setae present on proximal articles; calceoli absent. Antenna 2 peduncle articles 3 to 5 not enlarged, brush setae absent; flagellum long; calceoli absent. Labrum, epistome and upper lip separate; epistome less produced than upper lip, slightly concave; upper lip produced, downward-pointing and acute apically. Mandible incisor small, left and right slightly asymmetrical; molar absent; palp attached about midway, article 2 with central bulge. Maxilla 1 outer plate setal-tooth 7 present, not cuspidate; palp distal margin with apical robust setae. Maxilla 2 inner plate significantly shorter than outer plate. Maxilliped outer plate apical robust setae absent (with 3 subapical robust setae along inner margin).

Gnathopod 1 chelate; coxa vestigial, significantly shorter than coxa 2, subquadrate; basis sparsely setose along anterior margin; ischium very long (length 4 × to 6 × breadth); carpus very long (length more than 4 × breadth), longer than propodus, without posterior lobe; propodus margins subparallel, palm obtuse, entire, straight; 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 forming, weak spine. Urosomite 1 not projecting over urosomite 2, with a weakly produced, broadly truncated boss. Uropod 2 inner ramus without constriction. Peduncle without dorsolateral flange; outer ramus article 2 short, without plumose setae on rami. Telson deeply cleft.

Sexually dimorphic characters. Unknown.

Depth range. 1144 m.

Remarks. See remarks under E. chelatus.

Distribution. Australia. New South Wales.