New species and new records of Ampithoidae (Peracarida: Amphipoda) from Australian Waters Hughes, Lauren E. Peart, Rachael A. Zootaxa 2013 3719 1 1 102 4CWBQ [151,398,758,784] Malacostraca Ampithoidae Paragrubia Animalia Amphipoda 76 77 Arthropoda species dongara sp. nov.    Typematerial. Holotypemale, 16 mm, dissected, 4 slides, WAM C52215, Eagle Beach, near Cape Naturaliste, southwest of Busselton, Western Australia( 33°33’41”S 115°03’53”E), 0.5 m, fine brown alga  Sargassumsp., 5 December 2000, coll. R.A. Peart (WA 734); paratypefemale, 1 slide, WAM C52216, rocks near shore, Shelley Beach, Bunker Bay, near Cape Naturaliste, south of Busselton, Western Australia( 33°32’34”S 115°01’47”E), 0.5 m, mixed brown algae, 4 December 2000, coll. R.A. Peart (WA 731); 2 paratypespecimens, AM P.82628, rocks near shore, Shelley Beach, Bunker Bay, near Cape Naturaliste, south of Busselton, Western Australia( 33°32’34”S 115°01’47”E), 0.5 m, mixed brown algae, 4 December 2000, coll. R.A. Peart (WA 731).  Additional material examined.South Australia: Male, dissected, 4 slides, NMV J64949, point at north end of Little Beach, Two Peoples Bay ( 34°58’12”S 118°10’48”E), 5 m, 18 May 1986(SWA 72); 9 specimens, NMV J57020, point at north end of Little Beach, Two Peoples Bay ( 34°58’12”S 118°10’48”E), 5 m, 18 May 1986(SWA 72); 3 specimens, NMV J57111, Cliff Head, 30 kmsouth of Dongara( 29°32’00”S 114°59’00”E), 2 m, 22 April 1986(SWA 85); 1 specimen, NMV J57110, northern sided of West Island( 35°37’00”S 138°36’00”E), 5 m, 21 March 1985(SA 43).   Typelocality. Eagle Beach, near Cape Naturaliste, southwest of Busselton, Western Australia( 33°33’41”S 115°03’53”E).   Etymology.The species name is derived from the Western Australian township of Dongara, applied as a noun in apposition.   Diagnosis.Antenna 1 accessory flagellum 6-articulate. Mandible accessory setal row with 2 robust setae (3 on left). Lower lip outer plates notched; lateral lobes and medial lobes subequal in size; mandibular lobes with curved margins, rounded apically. Maxilla 1 outer plate palp slender, article 2 without robust setae. Gnathopod 1 similar to gnathopod 2; coxa 1 subequal to coxa 2, anterior margin concave, anteroventral corner produced subacute; basis shorter than coxa, posterior margin lined with slender setae, with single anterodistal lobe small, rounded, with 4 slender setae; ischium without well-developed lobe; propodus subovoid to subrectangular, length twice width, palm subacute, deeply excavate, palm defined by subquadrate corner with single robust seta. Gnathopod 2 basis subequal in length to coxa posterior margin with sparse slender setae, with single anterodistal lobe large, rounded, not reaching beyond ischium with 4 slender setae; propodus subrectangular, palm subacute, deeply excavate, palm defined by subquadrate corner with single robust seta. Telson subtriangular, apically rounded, oblique medial rows of slender setae and 4 pairs of short lateral slender setae.   Description of holotype. Head. Antenna 1 longer than antenna 2; peduncular article 1 length 1.2 times article 2; article 2 length 3.66 times article 3; article 3 length 0.23 times shorter than article 1; primary flagellum incomplete, more than 77 articles, accessory flagellum 6-articulate. Antenna 2 slender, similar to antenna 1; peduncle article 4 subequal in length to article 5; flagellum 34 articles. Mandible accessory setal row with 2 robust setae (3 on left); palp 3-articulate; article 2 with 2–3 slender setae; article 3 length 2.9 times width. Lower lip outer plates notched; lateral lobes and medial lobes subequal in size; mandibular lobes with curved margins, rounded apically. Maxilla 1 inner plate with 1 slender seta; outer plate palp slender, article 2 without robust setae. Maxilla 2 inner plate more narrow than outer plate. Maxillaped inner plate with small robust setae.  Pereon. Coxae 1–4 longer than broad. Gnathopod 1 similar to gnathopod 2; coxa 1 subequal to coxa 2, anterior margin concave, anteroventral corner produced subacute, posteroventral corner with tuft of long slender setae; basis shorter than coxa, posterior margin lined with slender setae, with single anterodistal lobe small, rounded, with 4 slender setae; ischium without well-developed lobe; merus anterodistal corner acute; carpus length twice width, 0.9 times propodus length; propodus subovoid to subrectangular, length twice width, palm subacute, deeply excavate, palm defined by subquadrate corner with single robust seta, palm length 0.5 times posterior margin; dactylus subequal in length to palm, apically acute, tapering evenly, inner margin crenate. Gnathopod 2 coxa posteroventral corner with tuft of long slender setae; basis subequal in length to coxa posterior margin with sparse slender setae, with single anterodistal lobe large, rounded, not reaching beyond ischium with 4 slender setae; merus anterodistal corner rounded; carpus subtriangular, length 1.5 times width, 0.9 times propodus length; propodus subrectangular, length 1.5 times width, palm subacute, deeply excavate, palm defined by subquadrate corner with single robust seta, palm length 0.5 times posterior margin; dactylus subequal in length to palm, apically acute, tapering evenly, without unguis, inner margin crenate.   FIGURE 48.  Paragrubia dongara  sp. nov.,holotype male, 16 mm, WAM C52215, Eagle Beach, near Cape Naturaliste, Western Australia.   FIGURE 49.  Paragrubia dongara  sp. nov.,holotype male, 16 mm, WAM C52215, Eagle Beach, near Cape Naturaliste, Western Australia, scales represent 0.5 mm for antennae 1–2 and 0.2 mm for mouthparts.   FIGURE 50.  Paragrubia dongara  sp. nov.,holotype male, 16 mm, WAM C52215, Eagle Beach, near Cape Naturaliste, Western Australia, scales 0.5 mm.   FIGURE 51.  Paragrubia dongara  sp. nov.,holotype male, 16 mm, WAM C52215, Eagle Beach, near Cape Naturaliste, Western Australia, scales 0.5 mm.  Pleon. Epimeron 1 subquadrate, posterior margin straight, posterodistal corner rounded. Epimera 2–3 subquadrate, posterior margin straight, posterodistal corner with small acute tooth. Uropod 1 reaching end of uropod 2 rami; peduncle length 2.5 times width, with 8 robust setae, without slender setal fringe, with large, acute distoventral spine; inner ramus 1.1 times length of peduncle, slightly longer than outer ramus, with 8 marginal robust setae; outer ramus with 10 marginal robust setae. Uropod 2 peduncle with 3 robust setae, with small distoventral spine; inner ramus subequal to outer ramus, with 8 marginal robust setae; outer ramus with 7 marginal robust setae. Uropod 3 peduncle length 1.41 times width, 1.58 times rami length, with 4 marginal robust setae, with 7 distal robust setae; inner ramus length twice width, with 4 lateral robust setae, 5 distal robust setae and 5 distal slender setae; outer ramus subequal in length to inner ramus with 2 small, distal robust setae, without recurved robust setae, with 3 lateral robust setae and lateral setal fringe. Telson subtriangular, apically rounded, with small apical cusps, oblique medial rows of slender setae, 4 pairs of short lateral slender setae and 2 pairs of lateral plumose setae.   Remarks.  Paragrubia dongara  sp. nov.and  P. mahafalensiscan be separated from all other  Paragrubiaby the deeply excavate propodus palms of both gnathopods 1 and 2, with the palms of  P. dwyeri  sp. nov.similar although more shallowly excavate and considered as concave.  Paragrubia dongara  sp. nov.can be distinguished from  P. mahafalensisby a number of characters including: the coxa 1 anterior margin more produced; mandible accessory setal row with only 3 setae and the rounded telson shape, where the latter species has coxa 1 weakly produced, 8 accessory setae and a trapezoidal shaped telson, respectively.   Paragrubia dongara  sp. nov.is also similar to  P. edgariin the gnathopod 1 propodus palm quadrate excavation but can be separated by the antenna 2 peduncle with less setose margins, and the coxa 1 anterior margin strongly produced. Overall the gnathopod 1 is only slightly larger than gnathopod 2 for  P. dongara  sp. nov., while in P. e d g a r ithe gnathopod 1 dominates gnathopod 2 by a greater ratio.   Distribution. Australia. Western Australia: Dongara; Two Peoples Bay; Busselton (current study). South Australia: West Island(current study).