New subterranean Sebidae (Crustacea, Amphipoda, Gammaridea) from Vietnam and SW Pacific Author Jaume, Damià IMEDEA (CSIC-UIB), Instituto Mediterráneo de Estudios Avanzados, c / Miquel Marquès 21, E- 07190 Esporles (Mallorca) (Spain) d. jaume @ uib. es jaume@uib.es Author Sket, Boris Univerza v Ljubljani, Biotehniška fakulteta, Oddelek za biologijo, p. p. 2995, 1001 Ljubljana (Slovenia) Author Boxshall, Geoff A. The Natural History Museum, Department of Zoology, Cromwell Road, London SW 7 5 BD (United Kingdom) text Zoosystema 2009 2009-06-30 31 2 249 277 http://www.bioone.org/doi/abs/10.5252/z2009n2a3 journal article 10.5252/z2009n2a3 1638-9387 5396757 Genus Seborgia Bousfield, 1979 emend. DIAGNOSIS. — Antennule short, less than half body length, longer than or equal to antenna, with more distal peduncle segments progressively shorter; accessory flagellum of antennule 1-articulate; flagellum of antenna shorter than corresponding peduncle. Incisor of both mandibles 5-dentate; lacinia mobilis present on both sides, left 5-dentate, similar to incisor, right reduced, multidentate; molar reduced to lappet crowned with single seta. Paragnaths with well-developed inner lobes, latter separated or fused proximally; outer lobes each with tubular pore presumably associated with salivary gland (see Barnard 1969: 11 ). Maxillule coxal endite (= inner lobe) unarmed; endopod (= palp) 2-segmented. Maxilla uni- or bilobed. Maxilliped basal endite (= inner plate) reduced, finger-like, with two simple setae distally; merus (= palp segment 1) short. Coxal plates I-IV much longer than broad, all about same length, larger than corresponding pereionites; coxa I broadly overlapping head, expanded anterodistally; coxae II and III narrow, subrectangular; coxa IV subrectangular with square excavation proximally on posterior margin. Coxal gills present on pereiopods II-VI, stalked, ovoid and smooth. Oostegites on pereiopods II-VI, long and slender, each with 2-4 simple marginal setae. Gnathopod I of similar size or, rarely, larger than gnathopod II, both with propodus widest distally; first gnathopod sub- or parachelate, second gnathopod parachelate; basis of gnathopod I longer than in gnathopod II; carpus of both gnathopods articulating on distolateral surface of merus, that of gnathopod II short. Urosomites separate. Margins of tergite of urosomite III produced posterolaterally into triangular process on each side covering origin of third uropods. Rami of uropods I and II notched subterminally; exopod of uropod III 1-segmented.