Pseudostichopus papillatus ( Djakonov, 1952 ) O'Loughlin & Ahearn, 2005

O'Loughlin, P. Mark & Ahearn, Cynthia, 2005, A review of pygal-furrowed Synallactidae (Echinodermata: Holothuroidea), with new species from the Antarctic, Atlantic and Pacific oceans, Memoirs of Museum Victoria 62 (2), pp. 147-179 : 174

Pseudostichopus papillatus ( Djakonov, 1952) comb. nov.

Figures 10d, e

Peristichopus papillatus Djakonov, 1952: 125–127 , figs 11–14.

Material examined. Syntypes. Russia, SE of Kamtchatka, 52°45'N, 161°41'E, 4100–4200 m, 25 Jul 1946, RAS (6).

Description. Up to 65 mm long; torpedo-shaped body, some gravel attachments; translucent body wall; prominent small tapered papillae, arising singly on wart-like tubercles in double rows on paired radii, typically 1.5 mm long; ossicles in tentacles, papillae; tentacle ossicles unbranched thick to thin, irregular rods, some swollen centrally, rugose at ends, some bluntly spinous, up to 280 Μm long; papillae ossicles irregular branching rosette-like endplates, irregular rods, some swollen centrally, some spinous, up to 260 Μm long.

Distribution. Russia, SE of Kamtchatka, 4100–4200 m.

Remarks. Djakonov (1952) referred this species to his new genus Peristichopus , which is considered above to be a junior synonym of Pseudostichopus . Amongst Pseudostichopus species, the distinguishing characters of P. papillatus are: the regular paired series of low tubercles and papillae on each of the paired radii; rosette-like “endplate” ossicles in papillae.

Figures

Figure 10. a, Pseudostichopus hyalegerus, sponge spicule cover (P. japonensis, paratype, SMBL 314, junior synonym, 29 mm long). b–c, P. mollis; b, rugose ventrum (TM H3111, 145 mm long); c, calcareous ring (TM H2004). d–e, P. papillatus (RAS, syntype, 27 mm long); d, dorsal view of paired radial tubercles; e, ventrolateral view, tube feet. f–h, P. peripatus; f, ventral view, marginal tubercles, grit attachment, transverse creases (NMV F101840, 60 mm long); g, ventral view, marginal tubercles, grit attachment, transverse creases (NMV F101839, 45 mm long); h, cylindrical muscles (arrows), gonad tubules (P. tuberculatus, holotype, OMNH Iv1190, junior synonym). i, P. tuberosus sp. nov. (USNM E16721, holotype, 115 mm long), ventral view, lateroventral tubercles (arrow).