Sophrosynidae, a new family in the Lysianassoidea (Crustacea: Amphipoda) with a revision of the genus Sophrosyne Author Lowry, J. K. Author Stoddart, H. E. text Zootaxa 2010 2010-02-25 2370 1 1 35 https://biotaxa.org/Zootaxa/article/view/zootaxa.2370.1.1 journal article 10.11646/zootaxa.2370.1.1 1175-5326 5306939 Sophrosyne peartae sp. nov. ( Figs 14–16 ) Type material . HOLOTYPE , female, 4.6 mm , ovigerous ( 3 eggs ), MV J60733 , south of Point Hicks , Victoria , Australia ( 38°19.10'S 149°14.30'E ), 600 m , coarse sand, epibenthic sled, M.F. Gomon on RV Franklin , 24 July 1986 (stn SLOPE 39). Type locality. South of Point Hicks , Victoria , Australia ( 38°19.10'S 149°14.30'E ), 600 m . Etymology . This species is named for Rachael Peart, who illustrated many of our amphipods and found morphological characters we had not noticed. Diagnostic description . Head lateral cephalic lobe small, narrowly rounded; eyes oval. Antenna 1 peduncular article 1 short, length 1.4 x breadth; accessory flagellum long, 0.5 x primary flagellum, article 1 short, 0.9 x article 2; flagellum 7-articulate, without callynophore. Antenna 2 peduncular article 3 0.5 x article 4; flagellum 7-articulate. Mandible incisors with straight margins; palp article 2 slender , 1 x article 3, with 1 submarginal posterodistal A2-seta, without D2-setae, article 3 length 6.2 x breadth, without D3-setae , and/ with 4 apical E3-setae. Maxilla 1 outer plate with setal-teeth in a 2/4 arrangement . Maxilliped inner plate subrectangular, without apical nodular robust setae; outer plate submarginal setae long, simple; palp article 2 slender, length 2.2 x breadth, 1.1 x article 3, article 3 slender, length 2.5 x breadth, dactylus with unguis absent. Gnathopod 1 basis length 1.7 x breadth, anterior margin with slender setae; ischium length 1.4 x breadth; merus, posterior margin lined with long slender setae; carpus length 0.5 x propodus; propodus length 1.8 x breadth, posterior margin slightly concave, with robust setae, palm margin sinusoidal , posterodistal corner with produced subacute spine bearing vestigial seta. Gnathopod 2 grossly subchelate in female, [not known for male]; ischium length 2.9 x breadth; carpus long, length 2.4 x breadth, posterior margin broadly lobate; propodus subrectangular , short, length 1.8 x breadth; palm acute, with large, concave , smooth margin . Pereopod 3 merus not expanded anteriorly. Pereopod 4 merus not expanded anteriorly. Pereopod 5 basis moderately expanded posteriorly; merus slightly expanded posteriorly. Pereopod 6 coxa small, slightly lobate posteriorly; merus slightly expanded posteriorly. Pereopod 7 basis posterior margin almost straight, scalloped , posteroventral margin straight, posteroventral lobe not extending beyond ischium; merus not expanded posteriorly; propodus with setae along anterior margin. Epimeron 3 posterior margin with strong upturned spine above rounded posteroventral corner . Urosomite 1 with anterodorsal notch and rounded boss, with lateral flange. Uropod 1 outer ramus slightly longer than inner ramus; outer ramus with 2 dorsal robust setae; inner ramus without dorsal robust setae. Uropod 2 rami subequal in length; rami without robust setae. Uropod 3 peduncle length 1.5 x breadth. Telson longer than broad, length 1.2 x breadth, moderately cleft (50%), distal margins rounded, with1 apical slender seta on each lobe. FIGURE 14. Sophrosyne peartae sp. nov. , holotype female, 4.6 mm, MV J60733 , south of Point Hicks, Australia. Remarks . Only two species of Sophrosyne , S. peartae and S. murrayi , have a grossly expanded palm on gnathopod 2. They differ most noticeably in the shape of the propodus of gnathopod 2, (subquadrate in S. murrayi and subrectangular in S. peartae ) and in the posteroventral corner of epimeron 3 (subquadrate in S. murrayi and rounded in S. peartae ). Distribution . Slope off Bass Strait, Australia in 600 m depth.