Sophrosyne murrayi Stebbing 1888

• Main Authors: Lowry, J. K., Stoddart, H. E.
• Format: Text
• Language: unknown
• Published: Zenodo 2010
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Amphipoda; Sophrosynidae; Sophrosyne; Sophrosyne murrayi; Antarctic; Southern Ocean; Kerguelen; Prydz Bay; Kerguelen Islands; New Zealand; Amery; Amery Ice Shelf; Seta; Larsemann Hills; Kerguelen Island; Lowry; Thurston; Amery Depression; Antarc*; Antarctica; aurora australis; Ice Shelf
• Online Access: https://dx.doi.org/10.5281/zenodo.5314957; https://zenodo.org/record/5314957

Sophrosyne murrayi Stebbing, 1888 (Fig. 13) Sophrosyne murrayi Stebbing, 1888: 652, pl. 15. — Della Valle, 1893: 795, pl. 60, fig. 38. — Stebbing, 1906: 21. —J.L. Barnard, 1958: 99. — Thurston & Allen, 1969: 368. — Lowry & Bullock, 1976: 105. — De Broyer, 1977: 331. — Barnard & Karaman, 1991: 533. — De Broyer & Jazdzewski, 1993: 75. — De Broyer et al ., 2007: 159. Material examined . HOLOTYPE, female, approx. 13 mm, BMNH 1889:5:15:16, off Christmas Harbour, Kerguelen Islands, Southern Ocean (approx. 48°40'S 69°03'E), unknown depth but less than 274 m, Challenger Collection. 1 female, ovigerous, 12.5 mm; 1 female with non-setose oostegites, 12.0 mm; MV J38221, Amery Depression, close to Amery Ice Shelf, Antarctica (68°56.69'S 73°36.78'E to 68°54.82'S 73°37.53'E), 786–791 m, epibenthic sled, M. O'Loughlin on RSV Aurora Australis , 17 February 1993 (stn AA93-157). 1 female with setose oostegites, 12.2 mm, MV J38222, eastern Prydz Bay, off Larsemann Hills, Antarctica (68°54.88'S 76°37.03'E to 68°54.82'S 76°37.71'E), 667–716 m, epibenthic sled, M. O'Loughlin on RSV Aurora Australis , 18 February 1993 (stn AA93-158). Type locality. Off Christmas Harbour, Kerguelen Islands, Southern Ocean (approx. 48°40'S 69°03'E). Diagnostic description . Head lateral cephalic lobe small, narrowly rounded; eyes apparently absent. Antenna 1 peduncular article 1 short, length 1.3 x breadth; accessory flagellum long, 0.6 x primary flagellum, article 1 long, 2.3 x article 2; flagellum 7+-articulate (broken), with weak 1-field callynophore. Antenna 2 peduncular article 3 0.53 x article 4; flagellum 9-articulate. Mandible incisors with slightly convex margins; palp article 2 slender , 1.1 x article 3, with 3 distal A2-setae and 2 submarginal posterodistal A2-setae, without D2-setae, article 3 length 5.3 x breadth, with or without D3-setae [Stebbing (1888, pl.15) drew 4 D3- setae but none were visible on the slide we examined] and 5 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 absent; palp article 2 slender, length 2.2 x breadth, 1.2 x article 3, article 3 slender, length 2.3 x breadth, dactylus with unguis absent. Gnathopod 1 basis length 1.6 x breadth, anterior margin with slender setae ischium length 0.8 x breadth; merus, posterior margin lined with long slender setae; carpus length 0.6 x propodus; propodus length 1.7 x breadth, posterior margin slightly concave, with robust setae and simple, slender 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 2.8 x breadth; carpus long, length 2.1 x breadth, posterior margin broadly lobate; propodus subquadrate , short, length 1.3 x breadth; palm slightly acute, with large, concave , rugose margin . Pereopod 3 merus weakly expanded anteriorly. Pereopod 4 merus expanded anterodistally along carpus. Pereopod 5 basis greatly expanded posteriorly; merus moderately expanded posteriorly. Pereopod 6 coxa small, slightly lobate posteriorly; merus expanded posteriorly. Pereopod 7 basis posterior margin slightly rounded, minutely crenate , posteroventral margin straight, posteroventral lobe not extending beyond ischium; merus slightly expanded posteriorly; propodus with setae along anterior margin. Epimeron 3 posterior margin with strong upturned spine above subquadrate 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 5 dorsal robust setae; inner ramus with 3 dorsal robust setae. Uropod 2 rami subequal in length; outer ramus with robust setae. Uropod 3 peduncle length 1.5 x breadth; inner ramus shorter than outer ramus. Telson longer than broad, length 1.1 x breadth, moderately cleft (60%), distal margins rounded, with1apical slender setae on each lobe. Remarks . Sophrosyne murrayi shares with S. rodondo a lack of D2- and D3-setae on the mandibular palp, a slender maxillipedal palp article 2, an angled posteroventral corner with strong upturned tooth on epimeron 3 and a moderately cleft telson. Sophrosyne murrayi differs from S. rodondo in the setal-tooth arrangement on the outer plate of maxilla 1 (2/ 4 in S. murrayi and 2/ 5 in S. rodondo ), but most noticeably in gnathopod 2 which is grossly subchelate in S. murrayi and minutely subchelate in S. rodondo . Distribution . Kerguelen Island, Southern Ocean; Amery Depression and Prydz Bay, Antarctica; 667–791 m depth. : Published as part of Lowry, J. K. & 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) on pages 23-25, DOI: 10.11646/zootaxa.2370.1.1, http://zenodo.org/record/5306939 : {"references": ["Stebbing, T. R. R. (1888) Report on the Amphipoda collected by H. M. S. 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(2007) Catalogue of the Gammaridean and Corophiidean Amphipoda (Crustacea) of the Southern Ocean with distribution and ecological data. In: De Broyer C. (ed.). Census of Antarctic Marine Life. Synopsis of the Amphipoda of the Southern Ocean. Vol. 1. Bulletin de l'Institut royal des Sciences naturelles de Belgique, Biologie 77, Supplement 1, part 1, 1 - 325."]}