Petrosia

"Petrosia" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure, which enables searching at various levels of specificity.

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A genus of SPONGES in the family Petrosiidae, characterized by an ectosomal triangular or polygonal reticulation of spicule tracts or single spicules.


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