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Using phylogenetic analyses of ribosomal DNA sequences, Geomyces species have been implicated in the biodeterioration of antique and optical glass.[16] Feeding off organic residues ubiquitously present on historical glass, such as dust or dead fungal and bacterial material[17], fungal colonization by Geomyces may ultimately lead to etching, pit corrosion, or the formation of cracks or patinas due to secretion of acidic metabolic byproducts, or penetration of fungal mycelia into the paint layer.[18]

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