Sophrosyne californica Lowry &amp; Stoddart 2010, sp. nov.
Creators: name: Lowry, J. K.
name: Stoddart, H. E.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Sophrosynidae
Sophrosyne
Sophrosyne californica

description: <i>Sophrosyne californica</i> sp. nov. <i>Sophrosyne robertsoni</i>. —J.L. Barnard, 1966: 72, figs 21, 22. <b>Type material</b>. (not examined, material of J.L. Barnard, 1966, as <i>S. robertsoni</i>) 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. <b>Type locality.</b> 28.9 miles from China Point Light, Tanner Basin, southern California, east Pacific Ocean (32°33'36"N 118°55'40"W), 1298 m. <b>Etymology</b>. The specific name refers to the type locality. <b>Diagnostic description</b>. <i>Head</i> lateral cephalic lobe small, narrowly rounded; eyes round. <i>Antenna 1</i> 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. <i>Antenna 2</i> [peduncular article 3 unknown]; flagellum 8-articulate. <i>Mandible</i> incisors with straight margins; <i>palp article 2</i> slender, 1.3 x article 3, <b>with 2 distal A2-setae</b>, <b>D2-setae present</b>, <b>article 3</b> length 5.8 x breadth, <b>with 2 distal D3-setae</b>, with 4 apical E3-setae. <b> <i>Maxilla 1</i> outer plate with setal-teeth in a 2/3 arrangement</b> . <i>Maxilla 2</i> inner plate narrow, outer plate broader; inner plate length 0.64 x outer plate. <b> <i>Maxilliped</i> inner plate</b> subrectangular, <b>without apical nodular robust setae</b>; outer plate submarginal setae long, simple; <i>palp article 2 slender</i>, length 2.7 x breadth, 1.2 x article 3, article 3 slender, length 3.1 x breadth, dactylus with unguis absent. <i>Gnathopod 1</i> 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, <b>palm margin straight</b>, <b>posterodistal corner with produced subacute spine bearing vestigial seta</b>. <i>Gnathopod 2</i> 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; <i>palm</i> transverse, <i>with concave</i>, smooth margin. <i>Pereopod 3</i> merus weakly expanded anteriorly. <i>Pereopod 4</i> merus weakly expanded anteriorly. <i>Pereopod 5</i> basis moderately expanded posteriorly; merus slightly expanded posteriorly. <b> <i>Pereopod 6</i> coxa small, slightly lobate posteriorly</b> ; merus slightly expanded posteriorly. <i>Pereopod 7</i> 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. <b> <i>Epimeron</i> 3 posterior margin with strong upturned spine above rounded posteroventral corner</b> . <i>Urosomite 1</i> with anterodorsal notch and rounded boss, without lateral flange. <i>Uropod 1</i> rami subequal in length; outer ramus with 3 dorsal robust setae; inner ramus with 1 dorsal robust seta. <i>Uropod 2</i> rami subequal in length; rami without robust setae. <i>Uropod 3</i> peduncle length 1.5 x breadth; rami subequal in length. <i>Telson</i> longer than broad, length 1.2 x breadth, moderately cleft (62%), distal margins incised, with1 apical slender seta on each lobe. <b>Remarks.</b> <i>Sophrosyne californica</i> shares with <i>S. cantractia</i> 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. <i>Sophrosyne californica</i> differs from <i>S. cantractia</i> 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. <b>Distribution</b>. Tanner Basin, eastern North Pacific Ocean in 1298 m depth.
description: Published as part of <i>Lowry, J. K. &amp; Stoddart, H. E., 2010, Sophrosynidae, a new family in the Lysianassoidea (Crustacea: Amphipoda) with a revision of the genus Sophrosyne, pp. 1-35 in Zootaxa 2370 (1)</i> on pages 9-10, DOI: 10.11646/zootaxa.2370.1.1, http://zenodo.org/record/5306939
description: {"references": ["Barnard, J. L. (1966) Submarine canyons of southern California. Part V. Systematics: Amphipoda. Allan Hancock Pacific Expeditions, 27 (5), 1 - 166."]}