Leucothoe longimembris Krapp-Schickel & Broyer 2014, sp. nov.

• Main Authors: Krapp-Schickel, Traudl, Broyer, Claude De
• Format: Other/Unknown Material
• Language: unknown
• Published: 2014
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Amphipoda; Leucothoidae; Leucothoe; Leucothoe longimembris; Antarctic; The Antarctic; Weddell Sea; Weddell; Antarc*
• Online Access: https://zenodo.org/record/3861083; https://doi.org/10.5281/zenodo.3861083

Leucothoe longimembris sp. nov. urn:lsid:zoobank.org:act: 935721E6-F9D5-4E0A-9AAD-5DEE628627EB Figs 5, 8-10 Diagnosis A 1> A 2, eyes absent, Cx 1-5 all ending ventrally at about the same level. Basis P 5-7 slim, broadest not medially but proximally; both margins of bases weakly serrated. Ep 2, 3 posterodistal corner lengthened and pointed. U 1 rami subequal, U 2 rami unequal, ratio 2:1, U 3 rami subequal, about 2/3 of peduncle. Etymology Many articles (in Latin membrum, abl. plural membris) like antennae, Gn 1, but especially the bases of the peraeopods 5-7 are unusually elongated (= longis) and this character is different from all other species hitherto known from the Antarctic or sub-Antarctic regions. The chosen specific name is used as non-flexible apposition. Type material Holotype ♀ ov. 15 mm (RBINS, I.G. 32565 / INV. 103462), Polarstern ANT XXII-3 (ANDEEP 3); sta. PS67/74-6 EBS; 20 Feb. 2005; eastern Weddell Sea; 71°18.35’S, 13°57.71’W; 1030 m; epibenthic sledge; coll. C. De Broyer & B. Danis. Description Length 15 mm. Head Anterior margin rounded, anterodistal margin rectangular with rounded corner. Mid-cephalic keel not prominent. Rostrum small. Eyes absent. Antenna 1 nearly half of body length, flagellum with 21 articles, peduncle art. 1 width proximally less than twice article 2, disto-inferiorly with acute tooth, length art. 1 subequal to art. 2, art. 3 about 1/4 of art. 2, acc. flagellum not seen. Peduncle art. 3 + flagellum shorter than peduncle arts 1+2. Antenna 2 shorter than antenna 1, peduncle art. 4> art. 5, flagellum 7 arts. Mouthparts: Mandibles lacking molars, incisor and lacinia mobilis dentate; palp 3-articulate, art. 2 with many lateral setae of different length, art. 3 with 2 distal setae, more than half length of art. 2. Maxilliped IP small, fused, OP reaching about 1/5 of inner margin of palp art. 1; palp articles similar in length. Peraeon Cx 1 smooth, length> width; anterior margin smooth, facial setae absent, inferior margin smooth. Gn 1 basis slender, not inflated, ...