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Rhopalastrum oracutibrachium
Caulet, 1986
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Description - Add description
Spongodiscid with three simple, undivided, spongy arms. Triangular shells, equilateral. Patagium present. Central structure partly obscured by spongy network, consisting of 5-6 concentric chambered rings. Spongy arms with sharp edges and ragged ends.
Dimensions:
Arm length, 120-130µm; Inner disk diameter, 70-80µm.
Remarks:
Some Pleistocene froms present well-marked arm edges, but these forms are smaller and their arm edges less sharp and thick. | | Caulet 1986 |
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