Ekelofia eltanin Lowry & Stoddart 2012, sp. nov.

• Main Authors: Lowry, J. K., Stoddart, H. E.
• Format: Text
• Language: unknown
• Published: Zenodo 2012
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Amphipoda; Pakynidae; Ekelofia; Ekelofia eltanin; Antarctic; Southern Ocean; Ross Sea; Seta; Lowry; Menzies; Darnley; Cape Darnley; Fram Bank; Antarc*; Antarctica; aurora australis
• Online Access: https://dx.doi.org/10.5281/zenodo.5251196; https://zenodo.org/record/5251196

Ekelofia eltanin sp. nov. (Figs 11–13) Ekelofia eltanin De Broyer et al ., 2007: 157 ( nomen nudum ). Type material. HOLOTYPE, male, 6.4 mm, USNM 1157176, Ross Sea, Southern Ocean, 76°02.1'S 179°57.0'W to 76°02.3'S 179°52.1'W, 347–358 m, Menzies trawl, 9 February 1972, USARP Eltanin cruise 51, stn 5762. PARATYPE, female, 11.0 mm, MV J38223, Fram Bank, north-west of Cape Darnley, Antarctica, 67°31.72'S 69°02.13'E to 67°31.93'S 69°02.02'E, 105–114 m, epibenthic sled, 13 February 1993, M. O'Loughlin, RSV Aurora Australis , stn AA93-130. Diagnostic description. Head lateral cephalic lobe large, broadly rounded; ventral margin curved. Antenna 1 peduncular article 1 with posterodistal spine; accessory flagellum 2-articulate, article 1 short; flagellum without callynophore in female, with strong 1-field callynophore in male. Mandible lacinia mobilis a simple robust seta lamina dentata absent; accessory setal row absent; molar absent; palp attached distally; palp article 2 broad, as long as article 3; article 3 not distally tapered, with anterior margin convex. Maxilla 1 outer plate with 8 setal-teeth in 5/3 arrangement, setal-teeth smooth; palp absent. Maxilliped inner plate small outer plate large; palp 4-articulate, article 4 large. Gnathopod 1 chelate; ischium smaller than propodus, not swollen posteroproximally; carpus extremely compressed; propodus length about 1.6 × breadth, with a vertical row of setae on medial face , posterior margin well developed, palm with produced corner, corner of palm with simple robust seta; dactylus reaching to corner of palm. Gnathopod 2 palm minute, obtuse. Pereonite 4 without dorsal spines. Pereonite 5 without dorsal spines. Pereopod 5 merus with posteroproximal shoulder. Pereopod 6 basis with posteroventral lobe produced beyond ischium; merus as broad as long, with posteroproximal shoulder. Pereopod 7 basis subrectangular with posterior margin weakly dentate. Epimeron 3 posterior margin without projections, posteroventral corner broadly rounded. Uropod 3 biramous, inner ramus extending beyond article 1 of outer ramus. Telson as long as broad , entire. Etymology. Named for the RV Eltanin , which made many fine collections of lysianassoid amphipods from the waters surrounding Antarctica; used as a noun in apposition. Remarks. Ekelofia eltanin differs from E. oculata in: the number of setal-teeth on maxilla 1 outer plate; the presence of small inner plates on the maxilliped; the vertical row of medial setae on gnathopod 1 propodus; the more strongly defined posteroproximal shoulder on the merus of pereopods 5 and 6; and the relatively longer telson. Distribution. Ross Sea and Fram Bank, Antarctica; 105–358 m depth. : Published as part of Lowry, J. K. & Stoddart, H. E., 2012, The Pachynidae fam. nov. (Crustacea: Amphipoda: Lysianassoidea) 3246, pp. 1-69 in Zootaxa 3246 (1) on page 19, DOI: 10.11646/zootaxa.3246.1.1, http://zenodo.org/record/5249007 : {"references": ["De Broyer, C., Lowry, J. K., Jazdzewski, K. & Robert, H. (2007) Catalogue of the Gammaridean and Corophiidean Amphipoda (Crustacea) of the Southern Ocean with distribution and ecological data. In: C. De Broyer (ed.) Census of Antarctic Marine Life: Synopsis of the Amphipoda of the Southern Ocean. Volume 1. Bulletin de l'Institut Royal des Sciences Naturelles de Belgique, Biologie, 77, Supplement 1 (1), 1 - 325."]}