Old, M.C. (1936). III. Yucatan fresh-water sponges. In: Pearse, A.S.; E.P. Creaser; F.G. Hall (eds.). The Cenotes of Yucatan. A Zoological and Hydrographic Survey. Publications of the Carnegie Institution of Washington. 457: 29-31, figs 1-2.
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Old, M.C.
1936
III. Yucatan fresh-water sponges. In: Pearse, A.S.; E.P. Creaser; F.G. Hall (eds.). The Cenotes of Yucatan. A Zoological and Hydrographic Survey.
Publications of the Carnegie Institution of Washington
