Morphological description (show/hide)
| massive, ridge-like flabellate, | | dark and light grey exterior, tan-brown inter | | numerous, small, scattered | | firm, poorly compressible, mucus absent | | smooth, even, arenaceous | | fibrous, irregular reticulation of primary and secondary fibres, primary fibres cored with spicules and sand, secondary fibres clear, all fibres with distinctive light pith and concentric lamination, mesohyl with some foreign spicules, with heavy collagen filaments | | arenaceous crust (mostly spicules) | | nil | | nil |
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