A. Primordialis
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Description: "Simple sponge (Ascetta primordialis). Note the vase-like form, the apical osculum, the inhalant pores in the walls." -Thomson, 1916
Source: Thomson, J. Arthur Outlines of Zoology (New York: D. Appleton & Company, 1916) 125
Keywords: simple sponge, Ascetta primordialis, apical osculum, inhalant pores, sponge walls, porifera
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