Trachythyone cynthiae O'Loughlin, 2009, sp. nov.

• Main Author: O'Loughlin, Mark
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2009
• Subjects: Biodiversity; Taxonomy; Animalia; Echinodermata; Holothuroidea; Dendrochirotida; Cucumariidae; Trachythyone; Trachythyone cynthiae; Antarc*; Antarctica; Enderby Land; MacRobertson Land; Prydz Bay
• Online Access: https://doi.org/10.5281/zenodo.6223185; http://treatment.plazi.org/id/F1688789FFA8E055D788F9FFFA88F974

Trachythyone cynthiae sp. nov. Figures 2 e, 3a, c, e; table 1. Trachythyone sp. MoV 2003 O’Loughlin et al., 1994: 552. Material examined. Holotype. Eastern Antarctica, Prydz Bay, 67°41'S 77°16'E, 333–341 m, ANARE AA91 stn 75, C.C. Lu & T.N. Stranks, 17 Feb 1991, NMV F165718. Paratypes. Type locality and date, NMV F68087 (3); Prydz Bay, 307–319 m, ANARE 87 stn 23, NMV F165717 (5); 188–208 m, ANARE 87 stn 31, NMV F161551 (2). Other material. Enderby Land, 193 m, BANZARE stn 41, SAM K2423 (2); 220 m, BANZARE stn 42, SAM K2422 (32); 690–911 m, 50°E ANARE, NMV F61505 (1); MacRobertson Land, 177 m, BANZARE stn 107, SAM K2424 (6); 109–121 m, ANARE, NMV F69119 (2); 118 m, NMV F68667 (1); Fram Bank, 145– 150 m, NMV F68093 (5); 304 m, NMV F161483 (3); 105–114 m, NMV F68666 (1); 204–216 m, NMV F68665 (2); 795–830 m, NMV F68664 (1); 98–301 m, NMV F68091 (2); 444–453 m, NMV F68098 (7); Prydz Bay, 307–319 m, NMV F161511 (2); 505–578 m, NMV F161491 (1); 405–439 m, NMV F68069 (1). Diagnosis. Body elongate, fusiform, tapered posteriorly, distinct tail; up to 60 mm long (preserved, excluding tentacles); body wall parchment-like, thin, calcareous, not rugose; 10 dendritic tentacles, ventral pair small; tube feet thin, elongate, not retractile, in radial series, predominantly single spaced series, sometimes zig-zag to double rows, radial rows symmetrical around body, series do not cross introvert; calcareous ring lacking posterior prolongations, radial plates with narrow sub-rectangular anterior projection, interradial plates with digitiform projection tapered anteriorly, all plates with rounded notch posteriorly; single polian vesicle; gonad tubules long, thin, unbranched. Mid-dorsal body wall ossicles thick perforated plates, spinous cups; plates elongate, narrow, predominantly 2 perforations wide, plates up to 608 µ m long, lacking knobs over most of plate, some plates with knobs and terminal pointed spines at one end, not spinous spires; cups round to slightly oval, typically 64 µ m long (up to 72 µ m), deep, bluntly ...