"Filamentous fungi" refers to a type of fungus that has long, thread-like structures called filaments. These filaments help the fungus to grow and spread. Full definition
Genomic sequence of the pathogenic and allergenic filamentous fungus Aspergillus fumigatus. (jcvi.org)
Cox obtained a biology degree at the University of Wolverhampton in the United Kingdom and went on to do a biochemical engineering Ph.D. at the University of Birmingham where he measured the growth of filamentous fungi in solid pastes using image analysis and fluorescence microscopy. (sciencemag.org)
Besides mushrooms such as truffles or morels, also many yeast and mould fungi, as well as other filamentous fungi belong to the Ascomycota phylum. (sciencedaily.com)