Paralysianopsis dandenong Lowry & Kilgallen, 2014, sp. nov.
Creators: name: Lowry, J. K.
name: Kilgallen, N. M.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Tryphosidae
Paralysianopsis
Paralysianopsis dandenong

description: Paralysianopsis dandenong sp. nov.
(Figs 20–22)
Types. Holotype, female, 2.2 mm, AM P.70314, off Moona Moona Creek, Jervis Bay, New South Wales, Australia (35º3.5’S 150º40.8’E), 4.6 m, kelp holdfasts, hand collected on SCUBA, 15 August 1981, coll. P.B. Berents. Paratypes: 2 males, 2.4–3.2 mm, AM P.70315, same collection details as holotype; 1 male, 2.3 mm, AM P.70316, off mouth of Moona Moona Creek, Jervis Bay, New South Wales, Australia (35º2.9’S 150º40.8’E), 4 m, Ecklonia holdfast, hand collected on scuba, September 1981 coll. P.B. Berents.
Type locality. Off Moona Moona Creek, Jervis Bay, New South Wales, Australia; 4.6 m depth.
Etymology. Named for the steamer Dandenong, sunk off Jervis Bay in September 1876; used as a noun in apposition.
Description. Based on female, 2.2 mm, AM P.70314. Head lateral cephalic lobe rounded; eyes oval. Antenna 1 accessory flagellum not forming operculum; primary flagellum with weak 2-field callynophore, robust setae absent from proximal articles; 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; epistome less produced than upper lip, straight; upper lip weakly produced, slightly subacute apically. Mandible molar a reduced column with reduced triturating surface. 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 apical robust setae absent.
Pereonites 1–7 dorsally smooth. Gnathopod 1 subchelate; coxa large, about as long as coxa 2, subrectangular with straight anterior margin; basis sparsely setose along anterior margin; ischium short; carpus short, subequal in length to propodus, without posterior lobe; propodus small, sparsely setose along posterior margin, palm moderately acute, entire, straight. Gnathopod 2 propodus palm moderately obtuse, with minutely serrate pad on posterior corner. Pereopod 5 basis about as long as broad, not posteroproximally excavate, 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 narrowly rounded. Urosomite 1 with slight notch. Uropod 2 inner ramus with constriction. Uropod 3 inner and outer rami well developed, outer ramus article 2 long, without plumose setae on rami. Telson entire, longer than wide, apically rounded, without dorsal robust setae, with 1 subapical robust seta on each apical corner.
Sexually dimorphic characters. Based on male, 2.3 mm, AM P.70316. Antenna 1 primary flagellum with strong 2-field callynophore.
Remarks. Paralysianopsis dandenong sp. nov. is very similar to P. padoz Lowry & Stoddart, 1995b. The distinguishing characters of these taxa are antenna 1 flagellum article 1, which is shorter than the remaining articles combined in P. dandenong (longer than the remaining articles combined in P. padoz); antenna 2 without brush setae (brush setae present in P. padoz); and the telson, which is apically rounded in P. dandenong (apically truncated in P. padoz).
Depth range. 4–4.6 m.
Distribution. Australia. Recorded only from Jervis Bay, New South Wales.
description: Published as part of Lowry, J. K. & Kilgallen, N. M., 2014, New tryphosine amphipods from Australian waters (Crustacea, Amphipoda, Lysianassoidea, Lysianassidae, Tryphosinae), pp. 1-64 in Zootaxa 3844 (1) on pages 28-31, DOI: 10.11646/zootaxa.3844.1.1, http://zenodo.org/record/5116622