Cucumaria dudexa O'Loughin & Manjon-Cabeza, sp. nov.

• Main Authors: O'Loughlin, Mark, Manjón-Cabeza, Eugenia, Ruiz, Francina Moya
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2009
• Subjects: Biodiversity; Taxonomy; Animalia; Echinodermata; Holothuroidea; Dendrochirotida; Cucumariidae; Cucumaria; Cucumaria dudexa; Antarc*; Antarctica; Bellingshausen Sea
• Online Access: https://doi.org/10.5281/zenodo.6219728; http://treatment.plazi.org/id/F31587C2795BFF9A9FDEFBE913F71353

Cucumaria dudexa O’Loughin & Manjón-Cabeza sp. nov. Figure 1a–c; table 1. Material examined. Holotype. East Bellingshausen Sea, R/V Hesperides , BENTART–2003, stn MB13B, 69.8223ºS, 77.8320ºW, 605 m, 15 Feb 2003, MNCN 29.04/125; tentacle ossicles slide NMV F161512; dorsal body ossicles slide F161513; ventral body ossicles slide F161514; dorsal body ossicles slide F161515. Diagnosis. Specimen 35 mm long (tentacles withdrawn, preserved), sub-cylindrical, widest diameter 6 mm; thin, flexible, calcareous, parchment-like body wall; distinct sole ventrally, slight “belly”; upturned oral cone, rounded distally, 2 soft dorso-lateral oral papillae, 0.6 mm long; upturned long tapered anal cone, 18 mm long, thin and rounded distally, 5 soft radial anal papillae 0.6 mm long; 10 dendritic tentacles, ventral pair small; tube feet confined to radii, well-developed close paired series bordering sole latero-ventrally, slightly more spread series mid-ventrally, ventral interradii bare, smaller sparse radial tube feet on oral and anal cones; calcareous ring with 10 plates; radial plates anteriorly digitiform, thin, wide posteriorly with triangular notch; interradial plates anteriorly elongate, thin, tapered, wide posteriorly with curved indentation. Ossicles in body wall slightly imbricate plates; ossicles single-layered, irregular, predominantly elongate, thick, smooth, perforated plates, few up to 24 large to small perforations, lacking surface and marginal knobs and spines, up to 400 µ m long; similar dorsally and ventrally; rare plates with digitiform denticulation and small perforations at one end. Tube feet with small endplates, 176 µ m diameter, small perforations centrally, marginally denticulate perforated support plates, not rods, up to 176 µ m long. Tentacles ossicles thick to thin, curved to bent to concave, round to oval, perforated plates, not rods, plates with blunt marginal denticulations, lacking surface knobs and spines, plates up to 208 µ m long. Colour (preserved). Off-white. Distribution. Antarctica, east ...