Psolidium incubans Ekman 1925
- Dataset
- Antarctic and Sub-Antarctic species of Psolidium Ludwig (Echinodermata: Holothuroidea: Psolidae)
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Echinodermata
- class
- Holothuroidea
- order
- Dendrochirotida
- family
- Psolidae
- genus
- Psolidium
- species
- Psolidium incubans
description
Figures 1 f; 4 f
materials_examined
Material examined. South Georgia, Discovery stn MS 67, E Cumberland Bay, 38 m, 28 Feb 1926, BM (NH) 2008.3190 (1 specimen). Diagnosis. Psolidium species up to 12 mm long; wrinkled body surface, created by high cups; dorsal and lateral scales not conspicuous; dorsal and lateral tube feet conspicuous. Sole: outer peripheral single series of smaller tube feet; inner peripheral single to zig-zag to double series of larger tube feet; lacking mid-ventral (sole) radial series of tube feet; sole soft, with folds for brood-protection. Dorsal ossicles: perforated plates with anastomosing secondary developments and multi-layering (scales), up to 700 μ m long, 0 – 2 tube foot canals per scale; shallow cups with 2 large central and 2 smaller end perforations, marginal knobs, cups 90 μ m long; deep goblet-like cups closed across rim, vertical blunt spines above rim, cups 70 – 90 μ m wide, 80 – 110 μ m high. Sole ossicles: shallow cupped crosses, shallow cups with small marginal knobs, cups 80 μ m long; shallow concave perforated plates, upturned marginal knobs, up to 14 perforations, plates up to 150 μ m long. Distribution. South Georgia, Cumberland Bay; 12 – 38 m. Remarks. As noted by Ekman (1925) this small species of Psolidium brood-protects in folds of the sole.
Name
- Homonyms
- Psolidium incubans Ekman 1925