Maeridae from the Indo-Pacific: Elasmopus, Leeuwinella gen. nov., Maeropsis, Pseudelasmopus and Quadrimaera (Amphipoda: Crustacea) Author Hughes, Lauren E. text Zootaxa 2015 4059 2 201 256 journal article 39226 10.11646/zootaxa.4059.2.1 7dbcc655-553b-4d35-8562-1a98c4555b89 1175-5326 232164 F9ED6784-D8C0-409E-9E4F-73879B265BC4 Quadrimaera gregoryi sp. nov. ( Figs 33–35 ) Type material. Holotype male, 5 mm , dissected, 3 slides, AM P.92788, off end of South Mole, Arthur Head, Fremantle, Western Australia , 32°03'S , 115°44'E , 6 m , sponges, 25 December 1983 , coll. R.T. Springthorpe, WA 276. FIGURE 31. Quadrimaera brownorum sp. nov. holotype male 4.5 mm, AM P. 92677, Cygnet Bay, Western Australia, scales 0.1 mm. Paratypes : B female, 7.2 mm , dissected, 1 slide, AM P.92789, off end of South Mole, Arthur Head, Fremantle, Western Australia 32°03'S , 115°44'E , 6 m , sponges, 25 December 1983 , coll. R.T. Springthorpe WA 276; 19 specimens 10 males , 4 gravid females and 5 juveniles , AM P.79370, off end of South Mole, Arthur Head, Fremantle, Western Australia , 32°03'S , 115°44'E , 6 m , sponges, 25 December 1983 , coll. R.T. Springthorpe, WA 276; 25+ specimens, AM P.79308, off end of South Mole, Arthur Head, Fremantle, Western Australia 32°03'S , 115°44'E , 6 m , spirorbid tube worms, 25 December 1983 , coll. J.K. Lowry, WA 283. Additional material examined. 31 specimens ( 1 male , 5 gravid females and 25 juveniles , AM P.79413, 1 km west of Red Bluff, Kalbarri, Western Australia , 27°42'S , 114°09'E , 18 m , macroalga Ecklonia sp. bed, rocky bottom, Ecklonia sp. holdfasts, 9 January 1984 , coll. R.T. Springthorpe, WA 453; 16 specimens , ( 1 male , 3 gravid females and 12 juveniles ), AM P. 79409, inshore limestone reef, Neds Camp, Cape Range National Park, Western Australia , 21°59'S , 113°55'E , 1 m , green/brown algae, 2 January 1984 , coll. R.T. Springthorpe, WA 373. FIGURE 32. Quadrimaera brownorum sp. nov. holotype male 4.5 mm, AM P. 92677, Cygnet Bay, Western Australia, scales 0.1 mm. Type locality. South Mole, Arthur Head, Fremantle, Western Australia , 3203'S, 11544'E. Etymology. Name for the explorers Sir Augustus Charles Gregory and his brother Francis Thomas Gregory, who conducted survey expeditions along the Western Australian coast. Description. Of holotype male, 5 mm , AM P.92788. Head. Eyes ovate; lateral cephalic lobe broad, apically truncate, anteroventral margin with excavate, anteroventral corner acute. Antenna 1 longer than antenna 2; peduncular article 1 shorter than article 2, with 3 robust setae on posterior margin; peduncular article 2 longer than article 3; flagellum articles as long as broad, or longer than broad, with 9 articles; accessory flagellum long, more than half length of primary flagellum, with 8 articles. Antenna 2 peduncular article 4 longer in length than article 5; flagellum with 8 articles. Mandible accessory setal row, well developed with 5 setae; palp well developed, article 1 length 1.2 × width, shorter than article 2, inner margin distally produced rounded; article 2 length 0.9 × article 3, lined with long slender setae; article 3 rectilinear, long, 2.8 × as long as broad, longer than article 1, with 5 lateral and 2 apical slender setae. Lower lip inner lobes present; outer lobes without apical ducts, mandibular lobes apically rounded to subacute (not illustrated). Maxilla 1 inner plate with 3 slender setae. Pereon. Gnathopod 1 coxa anterior margin concave, anteroventral corner produced, acute, ventral margin without robust setae, posteroventral corner without notch; basis anterodistal corner without lobes; ischium anterodistal corner without lobes; merus with posteroventral corner subquadrate; carpus length twice width, 1.2 × propodus length, posterior margin lined with long setae, with rows of setae covering medial surface; propodus subovate, medial surface setal comb absent, palm subacute, weakly convex, entire, lined with slender setae, defined by posterodistal corner with 3 robust setae; dactylus posterior margin lined with setules, closing along palm, unguis present. Gnathopod 2 subchelate; coxa posteroventral corner without notch, ventral margin without robust setae; basis broad, anterodistal corner with pair of well-developed rounded lobes ; ischium anterodistal corner with pair of well-developed rounded lobes; merus with acute posteroventral corner; carpus compressed, length 0.7 × width, anterior margin with 2 robust setae, posterior margin a few slender setae; propodus quadrate, length 1.1 × width, anterior and posterior margin with clusters of long slender setae, palm length less than one third of propodus posterior margin, angle transverse, distal shelf subquadrate with 3 pairs of robust setae, palm