(Figs 23–25)
Shackletonia robusta K.H. Barnard, 1931: 425. ―K.H. Barnard, 1932: 29, fig. 3. ―J.L. Barnard, 1958: 99. ― Thurston & Allen, 1969: 367. ― Arnaud, 1974: 592. ― Lowry & Bullock, 1976: 105. ― Barnard & Karaman, 1991: 529. ― De Broyer & Jazdzewski, 1993: 75. ― Wakabara et al., 1996: 355 (table I). ― Gutt et al., 2000: 80. ― De Broyer et al., 2007: 115.
Material examined. 1 male, 22.4 mm, MV J38209, off Larsemann Hills, eastern Prydz Bay, Antarctica, 68°54.88'S 76°37.03'E, 667 m, epibenthic sled, 18 February 1993, M. O'Loughlin, stn AA93-158. — 1 specimen, AAD collection, 230 km north of Shackleton Ice Shelf, Bruce Rise, Australian Antarctic Territory, Southern Ocean, 63°31'10"S 100°51'27"E to 63°30'54"S 100°50'54"E, 1266.79–1274.78 m, beam trawl, 29 December 2009, Australian Antarctic Division, RSV Aurora Australis, stn BR09 BTC02.
Description. Mandible molar a setose subtriangular flap. Maxilla 1 palp large, 2-articulate, with apical robust setae. Maxilliped inner plate well developed; outer plate without subapical notch. Gnathopod 2 dactylus reaching corner of palm. Pereopods 5 and 6 merus broader than long. Epimeron 3 posteroventral corner produced into a spine. Uropod 1 peduncle dorsolateral margin with more than 10 robust setae. Uropod 2 peduncle dorsolateral margin not castellate, with elongate robust setae. Uropod 3 reaching beyond the end of uropod 2; rami longer than peduncle, with plumose setae; outer ramus article 2 vestigial. Telson much longer than broad, deeply cleft (about 80%).
Distribution. South Shetland Island, South Georgia; Bruce Rise and Prydz Bay, Antarctica; 230–1275 m depth.