The phyllophorid sea cucumbers of southern Australia (Echinodermata: Holothuroidea: Dendrochirotida: Phyllophoridae) Author O’Loughlin, P. Mark Author Barmos, Shari Author VandenSpiegel, Didier text Memoirs of Museum Victoria 2012 2012-12-31 69 269 308 https://museumsvictoria.com.au/collections-research/journals/memoirs-of-museum-victoria/volume-69-2012/pages-269-308/ journal article 10.24199/j.mmv.2012.69.05 1447-2554 12212378 Lipotrapeza litusi O’Loughlin sp. nov. Figures 1c , 3 Material examined. Holotype . Western Australia , Cottesloe Beach , 32°00'S 115°45'E , beach washed, L. M. Marsh , Aug 1990 , WAM Z13475 . Diagnosis. Up to 70 mm long, 22 mm diameter (preserved, tentacles withdrawn); form cylindrical, upturned oral and anal rounded tapers; 20 tentacles, 5 outer pairs large, 5 inner pairs small; tube feet all around body, scattered dorsally, close ventrally, across introvert, diameters up to 0.7 mm ; calcareous ring stout, irregular, with some short posterior composite projections arising jointly from radial and inter-radial plates, not tubular, lacking thin radial composite posterior elongations; short stone canal, madreporite close to vascular ring; single polian vesicles; thin branched gonad tubules arise in series along gonoduct on each side of dorsal mesentery. Mid-body wall lacking ossicles; tube feet with endplates, support rods, abundant rosettes, few small plates; endplate diameters up to 536 µ m; support rods stout, distally enlarged and perforate, up to 144 µ m long; rosettes oval, up to 48 µ m long, intergrade with small plates; small plates irregular, perforate, denticulate margin, up to 104 µ m long; tentacles with rods and rosettes, rods stout, distally enlarged and perforate, up to 200 µ m long, abundant rosettes up to 64 µ m long. Colour (preserved) . Body off-white, body and tube feet with some residual red; tentacle trunks white, branches pale brown. Distribution. Southwest Australia , Cottesloe beach, off-shore sediments. Etymology. Named from the Latin litus (beach) with reference to the beach-washed source of the type specimen. Remarks . Lipotrapeza litusi O’Loughlin sp. nov. is distinguished from other Lipotrapeza species in the key (above). The single specimen that this species is based on was found on a beach and the species presumably lives in off-shore sediments.