Siphonoecetini Just, 1983 (Crustacea, Amphipoda, Ischyroceridae) 13: Western Australian species of Bubocorophiina in Rhinoecetes, Cephaloecetes, Sinoecetes, Borneoecetes and Pararhinoecetes gen. nov. Just, Jean Zootaxa 2019 2019-02-08 4554 1 101 140 7ZL3P Just, 2019 Just 2019 [151,474,439,465] Malacostraca Ischyroceridae Rhinoecetes GBIF Animalia Amphipoda 7 108 Arthropoda species rockinghamia sp. nov.   Figures 5–6   Type fixation. Holotype, ♂, here designated.   Etymology.The species is named for the township of Rockingham south of Perth.   Material examined.   Holotype, ♂, 3.9 mm. Northside of Point John, Rockingham, Western Australia, 32°15.53’S 115°41.10’E,  1.5 m, coarse sand with some detritus immediately outside dense belt of  Amphibolissea grass and algae, hand dredge, J. Just,  8 March 1984. stn AU 5, WAMC73434.    Paratypes. Samesample as holotype, WAMC73435 ( ♀A, 3.7 mm, 8 ♀♀). Samesample as holotype, WAMC73436 (ca. 100 abodes). Samesample as holotype, WAMC73437 (ca. 100 free specimens). Samesample as holotype, WAMC73438 (abode aggregates). Northside of Point John, Rockingham, Western Australia, 32°15.55’S 115°41.15’E, 2.0 m, coarse sand outside sea grass belt, hand dredge, J. Just,  12 March 1984, stn AU9, WAMC73439 ( 2 specimens). Northside of Point John, Rockingham, Western Australia, 32°15.54’S 115°41.12’E, 2.0 m, coarse sand just outside dense sea grass belt, hand dredge, J. Just,  6 April 1984, stn AU29, WAMC73440 (a few abodes and specimens). Samesample as holotype, NHMD-233133 ( 8 specimens). Reefwest of Groyne, 2 kmsouth of Cape Peron, Western Australia, 32°16’S 115°41’E,  6 m, sand pockets, JK Lowry,  26 Dec. 1983, stn WA- 292, AMP35071 (ca. 100 specimens). Reefwest of Groyne, 2 kmsouth of Cape Peron, Western Australia, 32°16’S 115°41’E,  6 m,  Caulerpa, JK Lowry,  26 Dec. 1983, stn WA-302, AMP35072 ( 1 specimenwith abode).   Description( ♂). Headas long as pereonites 1 and 2 combined along dorsal midline; mid-anterior depression moderately deep, encompassing approximately 0.5 head length. Rostrumstraight, acutely pointed, in dorsal view reaching beyond apices of eye lobes with about half length. Eye lobesbroadly rounded in lateral view, lower distal margin with 1–2 simple setae.  Antenna 1approximately as long as head and pereonites 1–4 combined, reaching to proximal 1/4 of antenna 2 peduncle article 5; flagellum of 5+ articles, as long as peduncle articles 2 and 3 combined, peduncle article 1 medial margin with proximal bulge. Antenna 2approximately as long as head and pereonites 1–6 and half of 7 combined; ventral projection of peduncle article 2 approximately as long as broad at base ( Fig. 5vp, in slightly oblique view), tapering to rounded apex, with short fringe of long simple setae apically and laterally; peduncle articles 4–5 with dorsal, ventral and lateral groups of simple setae, longest and densest on article 5; article 5 length 0.9 of article 4; flagellum articles 1 and 2 with many slender robust setae.  Mouthparts,mandible palp article 1 with 4 lateral, 4 medial and 3 or 4 apical long setae.  Gnathopod 1propodus length 3.2 width, with 3 mid-posterior robust setae. Gnathopod 2propodus length 2.0 greatest width. Pereopods 3–4basis with sequentially long and short setae along anterior margin, group of long setae submarginally in distal half of posterior margin; merus with mid-anterior and anterodistal long setae, posterior margin with 4–5 groups of unequally long setae. Pereopods 5–6basis anterior margin with 2 submarginal, transverse rows of long setae in distal half, posterior margin with a few short setae.  Uropod1 peduncle dorsolaterally with row of 5–7 robust setae, 1 simple seta proximally, and tuft of long setae distally, ventral apical margin with corona of strong denticles; outer ramus slightly inwardly curved, approximately 0.45 dorsal length of peduncle, lateral margin with 3–4 robust setae; inner ramus 0.8 length of outer ramus, straight. Uropod 2peduncle approximately half length of peduncle of uropod 1, with finely fimbriate corona; ramus 0.4 length of peduncle, 0.5 length of uropod 1 inner ramus, reaching just beyond uropod 3 ramus. Uropod 3peduncle with rounded median projection carrying a few simple setae apically; ramus with 2 long simple setae.  Telsonwidth approximately 1.4 length, apex evenly convex.  Female. Generally as male. Pereonite 7 ventrally with short, forward curving sternal papillae ( Fig. 6Fsp).  Size. Largest ♂, 3.9 mm; largest ♀, 3.7 mm.   FIGURE 5.  Rhinoecetes rockinghamia  sp. nov.Holotype, ♂, except F, ♀ paratype. a2 flag, antenna 2 flagellum; cdv, cephalon dorsal view; clv, cephalon lateral view; vp, ventral projection of article 2 of antenna 2. Scale for habitus and F: 1 mm.   FIGURE 6.  Rhinoecetes rockinghamia  sp. nov.Holotype, ♂, except F, ♀ paratype. gp1, gnathopod 1; gp2, gnathopod 2; md plp,mandible palp; p4, pereopod 4; p6, pereopod 6; up ped vv, uropods 1 and 2 peduncles, ventral apical margin; us, urosome; sp, sternal papilla (left lateral view).  Colour.Antenna 1 transparent colourless, except articles with fine white or reddish rings apically; peduncle article 1 red brown at base; antenna 2 and entire body white, entrails faintly shining through in yellowish-brown; mandible palp brown; all other appendages mostly transparent colourless; eyes white with black ocelli. Abodes.The numerous abodes from the typelocality were all microprosobranch shells. A few abode aggregates was observed.   Distribution. Western Australia, Rockingham, 1– 2 m.   Remarks.  Rhinoecetes rockinghamia  sp. nov.shares with  R. lowryi  sp. nov.(below) the long row of 5–7 robust setae on the peduncle of uropod 1. It differs from  R. lowryiby its broadly rounded eye lobes in lateral view (elongate, apically truncate), and in the strongly denticulate uropod 1 peduncular corona (finely fimbriate). 2234227315 1984-03-08 WAM J. Just North 2 -32.258835 Rockingham 12 115.685 Point John 7 108 1 1 Western Australia holotype 2234227414 1983-12-26 1984-04-06 1983-12-26 WAM, AM J. Just & JK Lowry Same 6 -32.266666 Same 1211 115.683334 Same 7 108 120 9 Western Australia paratype