Psolus carolineae O'Loughlin & Whitfield, 2010, sp. nov.

• Main Authors: O'Loughlin, Mark, Whitfield, Emily
• Format: Other/Unknown Material
• Language: unknown
• Published: 2010
• Subjects: Biodiversity; Taxonomy; Animalia; Echinodermata; Holothuroidea; Dendrochirotida; Psolidae; Psolus; Psolus carolineae; Antarctic; Antarctic Peninsula; Scotia Sea; Bransfield Strait; Antarctic Ocean; Shag Rocks; Lockhart; Antarc*; Antarctica; Icefish
• Online Access: https://zenodo.org/record/6196619; https://doi.org/10.5281/zenodo.6196619

Psolus carolineae sp. nov. Figures 2 a–f, 3 a–d. Material examined. Holotype. Antarctica, Scotia Sea, South Georgia, 55.06 ºS 35.24 ºW, 116 m, ICEFISH 2004 stn 47 –BT– 25, S. Lockhart, 12 Jun 2004, NMV F 168623. Paratypes. From type series (type locality on same date), NMV F 104996 (5); Shag Rocks, 53.63 ºS 40.91 ºW, 206 m, BAS 2006 stn SR–EBS– 4, NMV F 168627 (1). Other material. Antarctic Peninsula, N of Bransfield Strait, 227–231 m, US AMLR 2006 stn 33 – 18, USNM 1132590 (2); N of D’Urville I., 238 m, US AMLR 2006 stn 39–52, USNM 1132592 (1); N of D’Urville I., 238 m, US AMLR 2006 stn 39–52, USNM 1132593 (8). Diagnosis. Psolus species up to 22 mm long, 9 mm high, 11 mm wide; high to low convex body, slightly tapered posteriorly, lacking oral and anal cones; scales obscured by close cover of large and small apically spinous pillars on the scales, up to 0.5 mm high; lacking 5 discrete oral valves, oral scales numerous, apically pointed, marginally spinous; tentacles 10, 8 large, 2 small ventrally; calcareous ring with distally rounded radial and interradial anterior projections, radial projections larger, concave radial and interradial posterior indentations; thin calcareous sole, single outer peripheral series of small tube feet, zig-zag to double series of larger inner peripheral tube feet, lacking mid-ventral tube feet; bi-lobed dorsal madreporite; single ventral polian vesicle; gonad tubules unbranched. Dorsal and lateral multilayered ossicles only. Sole with irregular round to oval perforated plates and shallow bowls, commonly 136 µ m long, frequently with upturned margin, surface and marginal knobs. Largest tentacle ossicles irregularly oval or triangular or elongate thick perforated plates, surface smooth, bluntly denticulate margin, up to 560 µ m long. Largest tube feet support ossicles up to 320 µ m long, elongate curved narrow perforated plates, bluntly denticulate margin, rare sparse surface knobs. Colour (preserved). White to off-white, slightly translucent sole. Distribution. Antarctic Ocean, South ...