Lysianella moonamoona Lowry & Kilgallen, 2014, sp. nov.

Lysianella moonamoona sp. nov.

(Figs 9–11)

Types. Holotype, immature (?) male, 3.2 mm, AM P.68976, off mouth of Moona Moona Creek, Jervis Bay, New South Wales, Australia (35°2.9’S 150°41.0'E), 4 m, macroalga Ecklonia sp. holdfast, hand collected on scuba, September 1981, coll. P.B. Berents.

Type locality. Off mouth of Moona Moona Creek, Jervis Bay, New South Wales, Australia; 4 m depth.

Etymology. Named for Moona Moona Creek, the type locality; used as a noun in apposition.

Description. Based on holotype, (?) male, 3.2 mm. Head lateral cephalic lobe narrowly rounded; eyes oval. Antenna 1 accessory flagellum not forming operculum, 4-articulate; primary flagellum with weak 1-field callynophore, robust setae absent from proximal articles; calceoli absent. Antenna 2 peduncular article 3 short; article 4 slightly swollen; flagellum short, calceoli absent. Labrum, epistome and upper lip separate; epistome less produced than upper lip, straight; upper lip produced, apically subacute. Mandible molar with reduced column and reduced triturating surface; palp attached slightly distally, article 3 without A3-setae. Maxilla 1 outer plate setal-tooth 7 present, left and right symmetrical, cuspidate distally; palp distal margin with apical robust setae. Maxilliped outer plate with 1 short apical robust seta; palp article 4 well-developed.

Pereonites 1–7 dorsally smooth. Gnathopod 1 subchelate; coxa large, about as long as coxa 2, subrectangular, with straight anterior margin; basis without setae along anterior margin; ischium short; carpus short, subequal in length to propodus, without posterior lobe; propodus small, margins subparallel, sparsely setose along posterior margin, palm transverse to slightly acute, entire, straight. Gnathopod 2 minutely chelate; propodus palm slightly obtuse. Pereopod 4 coxa with a well-developed posteroventral lobe. Pereopod 5 basis about as long as broad, not posteroproximally excavate, posterior margin weakly 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 rounded. Urosomite 1 with slight notch. Uropod 2 inner ramus with weak constriction. Uropod 3 inner and outer rami well developed, outer ramus article 2 long, without plumose setae on rami. Telson entire, as long as wide, apically convex without dorsal robust setae, with 2 apical robust setae on each lobe.

Sexually dimorphic characters. Not known.

Remarks. We have tentatively placed this species in the genus Lysianella. The antenna 2 peduncle article 4 is not as enlarged as in other species of the genus. The description is based on a small, probably immature, specimen. We consider that this character has not yet fully developed in the material at hand.

Depth range. 4 m.

Distribution. Australia. Recorded only from Jervis Bay, New South Wales.