Paralysianopsis dandenong, Lowry & Kilgallen, 2014

Lowry, J. K. & Kilgallen, N. M., 2014, New tryphosine amphipods from Australian waters (Crustacea, Amphipoda, Lysianassoidea, Lysianassidae, Tryphosinae), Zootaxa 3844 (1), pp. 1-64 : 28-31

publication ID	https://doi.org/ 10.11646/zootaxa.3844.1.1
publication LSID	lsid:zoobank.org:pub:10B3C1CE-6279-4B4C-8139-C5D3EDB24255
DOI	https://doi.org/10.5281/zenodo.5116650
persistent identifier	https://treatment.plazi.org/id/3462395F-AB1F-FF98-6688-FEC8FC45FC94
treatment provided by	Felipe
scientific name	Paralysianopsis dandenong
status	sp. nov.

Treatment

Paralysianopsis dandenong View in CoL sp. nov.

( Figs 20–22 View FIGURE 20 View FIGURE 21 View FIGURE 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. GoogleMaps 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. GoogleMaps

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.