Psolidium normani O'Loughlin & Ahearn 2008, sp. nov.

• Main Authors: O'Loughlin, P. Mark, Ahearn, Cynthia
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2008
• Subjects: Biodiversity; Taxonomy; Animalia; Echinodermata; Holothuroidea; Dendrochirotida; Psolidae; Psolidium; Psolidium normani; Adelie Land; Antarc*; Antarctica; aurora australis; Enderby Land; Prydz Bay
• Online Access: https://doi.org/10.5281/zenodo.10878579; http://treatment.plazi.org/id/03D7DF24FF8BFF9D0314FAFF34F5FB7F

Psolidium normani sp. nov. Figures 2a, b; 5d, f Psolidium cf. gaini .— O’Loughlin et al., 1994: 552, 554 (non Psolidium gaini Vaney, 1914). Material examined . Holotype: eastern Antarctica, MacRobertson Shelf, ANARE 1993, Aurora Australis stn 127, 67°16’S 65°26’E, 109-121 m, M. O’Loughlin, 12 Feb 1993, NMV F157400. Paratypes: Type locality and date, F68661 (1 specimen); F69118 (1); Prydz Bay, Fram Bank, stn 130, 67°32’S 69°02’E, 105–114 m, F68662 (1); ANARE 1991, Aurora Australis stn 100, 67°28’S 68°50’E, 145–150 m, C. C. Lu and T. N. Stranks, 28 Feb 1991, F68111 (1); K. L. Gowlett-Holmes and W. Zeidler, SAM K2220 (1); Enderby Land, BANZARE stn 41, 65°48’S 53°16’E, 193 m, SAM K2341 (2); Adelie Land, BANZARE stn 90, 66°21’S 138°28’E, 640 m (possibly “much shallower”, according to BANZARE records), SAM K2349 (1). Diagnosis . Psolidium species up to 30 mm long; body elongate, transversely rounded form (preserved), sole narrower than body width; dorsal and lateral tube feet conspicuous, numerous, cover body closely; dorsal and lateral scales inconspicuous. Sole: outer peripheral single series of smaller tube feet; inner peripheral single series of larger tube feet; lacking mid-ventral (sole) radial series of tube feet. Dorsal ossicles: predominantly single-layered perforated plates (scales), some secondary layering; up to 4 tube foot canals or marginal indentations per plate; scales up to 800 μ m wide; numerous tube foot support plates, curved, spinous on one side (rarely both sides), marginal spines sometimes bifurcate, up to 19 perforations, up to 136 μ m long; tube foot ‘endplates’ small irregular mesh-like, up to 48 μ m wide, few perforations, irregular marginal projections, not regularly perforated plates. Sole ossicles: scale-like perforated plates, intergrading with buttons with 4 perforations; plates bluntly to sharply spinous to knobbed on one side, projections sometimes bifurcate; pronounced surface thickenings with ridges or lumps; up to 48 perforations per plate; plates up to 352 μ m long. Distribution . ...