Morphological description (show/hide)
| massive, subcylindrical barrels | | grey to light grey or brownish on deck | | white to brown | | large, >5 mm (d), scattered over upper surface between conules, also apical in terminal depression | | tough, rubbery, difficult to cut | | prominently conulose, conules spiky, <2 cm (h), form longitudinal ridges, terminate in thin microconulose projections | | fibrous, primary fibres cored with foreign detritus, particularly at fibre nodes, secondary fibres smaller, clear of debris, mesohyl collagen fairly dense, large sand grains and coral detritus scattered throughout, collagen filaments very light, thin, with small basal swelling, mostly visible around aquiferous canals | | thick layer of foreign debris in parts, debris absent in some areas | | nil | | nil |
|