New lysianassoid genera and species from south-eastern Australia (Crustacea: Amphipoda) Author Lowry, J. K. Author Stoddart, H. E. text Records of the Australian Museum 1995 1995-05-10 47 1 7 25 https://journals.australian.museum/lowry-and-stoddart-1995-rec-aust-mus-471-725/ journal article 10.3853/j.0067-1975.47.1995.5 3272d7a6-47c3-416c-9a02-5b18c553f132 0067-1975 4654764 Thaumodon n.gen. Diagnosis. Antenna 1: female without callynophore, male with weak I-field callynophore. Antenna 2: peduncular articles 4 and 5 not enlarged in male, flagellum not elongate in male. Mandible: incisors symmetrical, extremely enlarged, both with slightly convex margins; lacinia mobilis absent; accessory setal row present; molar a reduced setose flap; mandibular palp attached extremely proximally. Maxilla 1: outer plate narrow, with 11 setal-teeth, ST1 to ST7 large, strongly curved, without cusps, ST7 displaced onto inner row; STA to STD compressed, large, strongly curved, without cusps, STB compressed between STA and STC; palp with serrate apical margin. Maxilliped: inner plate with 3 greatly elongate apical setae. Gnathopod 1: simple; dactylus short, rasp-like with a medial row of large teeth and several medial rows of smaller teeth. Peraeopods 3 and 4 in male, merus and carpus with plumose setae along posterior margin. Uropod 3: peduncle short with strongly developed lateral flange; male peduncle and rami with plumose setae. Telson slightly longer than broad, moderately cleft (50%).