Petrosaspongia nigra Bergquist, 1995
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publication ID |
https://doi.org/ 10.5281/zenodo.172425 |
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DOI |
https://doi.org/10.5281/zenodo.6494289 |
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persistent identifier |
https://treatment.plazi.org/id/03BE878E-DE1E-FF81-FEC2-FDF7FD29FB9C |
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treatment provided by |
Plazi |
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scientific name |
Petrosaspongia nigra Bergquist, 1995 |
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Petrosaspongia nigra Bergquist, 1995 View in CoL
pictures.
Description
External features
Massive–lobulose with an unarmoured microconulose surface. Each conule ends in a thin projecting fibre ( Fig. 1 View FIGURE 1. P A). Consistency stony, incompressible. Oscules spread on the surface, 1–2.8 mm in diameter. Colour blackish outside, beige inside, in alcohol.
Skeleton
Reticulate with a dense network of secondary fibres forming meshes 80–225 m in diameter. They form fenestrate plates when they join the primary fibres.
Primary fibres: 355–790 m in thickness, strongly cored by foreign debris ( Fig. 1 View FIGURE 1. P B)
Secondary fibres: 20–80 m ( Fig. 3 View FIGURE 3 A), laminated and completely free of foreign debris. ( Fig. 1 View FIGURE 1. P B–C & Fig. 3 View FIGURE 3 C). Through SEM, the surface of the secondary fibres appears rippled in a longitudinal direction ( Fig. 1 View FIGURE 1. P C).
Tertiary fibres: Very thin, rare.
Choanosome containing abundant sand and other foreign materials ( Fig. 1 View FIGURE 1. P D).
Distribution: Southwest Pacific region, New Caledonia islands, from 10 to 38 m depth.
Note. The re–examination of the holotype allowed us to measure the skeletal elements, and our results provide larger fibre diameters (particularly for the primary fibres) from those given by Bergquist (1995).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.