Hallmann, E.F. (1917). On the genera Echinaxia and Rhabdosigma (Porifera). Proceedings of the Linnean Society of New South Wales. 42(2): 391-405, pls XXI-XXII.
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Hallmann, E.F.
1917
On the genera <i>Echinaxia</i> and <i>Rhabdosigma</i> (Porifera).
Proceedings of the Linnean Society of New South Wales