A review of pygal-furrowed Synallactidae (Echinodermata: Holothuroidea), with new species from the Antarctic, Atlantic and Pacific oceans Author O'Loughlin, P. Mark Author Ahearn, Cynthia text Memoirs of Museum Victoria 2005 2005-12-31 62 2 147 179 https://museumsvictoria.com.au/collections-research/journals/memoirs-of-museum-victoria/volume-62-issue-2-2005/pages-147-179/ journal article 10.24199/j.mmv.2005.62.5 1447-2554 12208025 Molpadiodemas pediculus sp. nov. Figures 5h–k , 8g –h Material examined . Holotype . South Atlantic Ocean , NE of South Sandwich Is , 55°07'S , 25°59'W , 5435–5453 m , RV Eltanin , Cr 8 stn 591, 29 Apr 1963 , USNM 1008318 . Paratypes . Type locality and date, NMV F104796 (1). Other material. Scotia Sea , N of South Orkney I., 2800 m , USNM E48635 (1). Description . Up to 60 mm long; body small, rounded in section, elongate, tapered anteriorly and posteriorly, lacking brim; body wall firm, semi-gelatinous, surface smooth, not covered with attachments; tube feet all over body, overlapping ventrolaterally, distinctly cylindrical, frequently erect, close cover, anteriorly and pygally, typically 1.0 mm long, 0.25 mm diameter, up to 1.5 mm long; tube feet typically shorter, more thread-like, dorsally and ventrally than ventrolaterally; longitudinal muscles broadly attached, relatively narrow, slightly thickened; some unbranched gonad tubules; ossicles in tentacles only, predominantly irregular, thick, rough to smooth, sometimes bluntly spinous rods, swollen mid-rod, tapering at ends, rare branches joined to create thick intertwining mesh, sometimes irregularly tuberous, up to 280 Μm long. Colour . Body, tube feet off-white to pale brown. Etymology . From the Latin pediculus (little foot), referring to the prominent ventrolateral band of small tube feet. Distribution . South Atlantic Ocean, off South Sandwich and South Orkney Is, 2800–5453 m . Remarks . Amongst Molpadiodemas species , the distinguishing characters are: body tapering orally and anally; close cylindrical tube feet overlapping ventrolaterally; longitudinal muscles broadly attached, relatively narrow, slightly thickened.