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 californica sp. nov. Sophrosyne robertsoni . —J.L. Barnard, 1966: 72 , figs 21, 22. Type material . (not examined, material of J.L. Barnard, 1966 , as S. robertsoni ) HOLOTYPE , female, 8.0 mm, LACM, 28.9 miles from China Point Light , Tanner Basin , southern California , east Pacific Ocean ( 32°33'36"N 118°55'40"W ), green mud, Campbell grab, 1298 m , 29 January 1960 , stn 6832 . PARATYPE , LACM, same data . Type locality. 28.9 miles from China Point Light , Tanner Basin , southern California , east Pacific Ocean ( 32°33'36"N 118°55'40"W ), 1298 m . Etymology . The specific name refers to the type locality. Diagnostic description . Head lateral cephalic lobe small, narrowly rounded; eyes round. Antenna 1 peduncular article 1 medium length, length 1.5 x breadth; accessory flagellum medium length, 0.36 x primary flagellum, article 1 short, 1.7 x article 2; flagellum 9-articulate, without callynophore. Antenna 2 [peduncular article 3 unknown]; flagellum 8-articulate. Mandible incisors with straight margins; palp article 2 slender, 1.3 x article 3, with 2 distal A2-setae , D2-setae present , article 3 length 5.8 x breadth, with 2 distal D3-setae , with 4 apical E3-setae. Maxilla 1 outer plate with setal-teeth in a 2/3 arrangement . Maxilla 2 inner plate narrow, outer plate broader; inner plate length 0.64 x outer plate. Maxilliped inner plate subrectangular, without apical nodular robust setae ; outer plate submarginal setae long, simple; palp article 2 slender , length 2.7 x breadth, 1.2 x article 3, article 3 slender, length 3.1 x breadth, dactylus with unguis absent. Gnathopod 1 basis length 2.2 x breadth, anterior margin with slender setae; ischium length 1 x breadth; merus, posterior margin lined with long slender setae; carpus length 0.6 x propodus; propodus length 1.9 x breadth, posterior margin slightly concave, with robust setae, palm margin straight , posterodistal corner with produced subacute spine bearing vestigial seta . Gnathopod 2 minutely subchelate; ischium length 3.25 x breadth; carpus long, length 3.8 x breadth, posterior margin straight; propodus subrectangular, long, length 2.7 x breadth; palm transverse, with concave , smooth margin. Pereopod 3 merus weakly expanded anteriorly. Pereopod 4 merus weakly 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 slightly rounded, minutely crenate, posteroventral margin rounded, 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, without lateral flange. Uropod 1 rami subequal in length; outer ramus with 3 dorsal robust setae; inner ramus with 1 dorsal robust seta. Uropod 2 rami subequal in length; rami without robust setae. Uropod 3 peduncle length 1.5 x breadth; rami subequal in length. Telson longer than broad, length 1.2 x breadth, moderately cleft (62%), distal margins incised, with1 apical slender seta on each lobe. Remarks. Sophrosyne californica shares with S. cantractia the same setal-tooth arrangement on the outer plate of maxilla 1, a vestigial seta on the posterodistal corner of the gnathopod 2 propodus and a curved posteroventral corner with a strong upturned tooth on epimeron 3. Sophrosyne californica differs from S. cantractia in the presence of D-setae on the mandibular palp, in the absence of apical nodular setae on the inner plate of the maxilliped and in the slender second article of the maxillipedal palp. Distribution . Tanner Basin, eastern North Pacific Ocean in 1298 m depth.