Psolidium mccallumae, O’Loughlin & Ahearn, 2008

O’Loughlin, P. Mark & Ahearn, Cynthia, 2008, Australian species of Psolidium Ludwig (Echinodermata: Holothuroidea: Psolidae), Memoirs of Museum Victoria 65, pp. 1-22 : 16

publication ID	https://doi.org/ 10.24199/j.mmv.2008.65.2
DOI	https://doi.org/10.5281/zenodo.8070640
persistent identifier	https://treatment.plazi.org/id/03FC87C9-5617-FFAD-A2AD-FE23FE6CF1E3
treatment provided by	Felipe
scientific name	Psolidium mccallumae
status	sp. nov.

Treatment

Psolidium mccallumae View in CoL sp. nov.

Table 1 View Table 1 , Figures 3b View Figure 3 , 7a–b View Figure 7

Material examined. Holotype: Western Australia, off Point Cloates, upper continental slope, hard substrate, Southern Surveyor SS 10/2005 stn 139, 22.85°S 113.51°E, 100 m, 9 Dec 2005, NMV F126891 View Materials . GoogleMaps

Description. Psolidium species up to 7 mm long (preserved); dorsal and lateral body scales thick, up to 1.3 mm wide, oral and anal cone scales tapering to projecting angled spine; dorsal and lateral tube feet conspicuous.

Sole with peripheral band of tube feet, outer single series of slightly smaller tube feet, inner single series; lacking mid-ventral radial series of tube feet.

Dorsal and lateral ossicles: multi-layered ossicles (scales), up to 2 tube foot canals; cups shallow, 4-8 perforations, cross and rim covered with fine spinelets, cups 40–72 μ m long; rosettes rare, small, up to 32 μ m long.

Sole ossicles: smooth, irregular perforated plates, up to 16 perforations, up to 184 μ m long; shallow cups with finely spinous rim, typically 4 perforations, typically 48 μ m long; lacking rosettes.

Colour (preserved). White dorsally, laterally, ventrally.

Distribution. Central Western Australia, off Point Cloates, upper continental slope, hard substrate; 100 m.

Table 1, Figures 3c-d, 7e-f

Etymology. Named for Anna McCallum (Marine Biology Section,Museum Victoria) with appreciation of her participation in the collection of this material on the Southern Surveyor, and her careful curation of this holothuroid collection in Museum Victoria.

Remarks. The distinctive character of Psolidium mccallumae sp. nov. is the complete cover of small spinelets on the cross and rim of the shallow dorsal cups.