Six genera of anaerobic fungi are currently recognised, but recent studies have shown there is at least ten more that are likely to exist! One of the latest papers on this topic is:
Anaerobic fungi are sensitive to oxygen, but our understanding of their mechanisms to tolerate oxygen exposure is slowly progressing. http://www.nature.com/srep/2014/141104/srep06892/full/srep06892.html
Are you new to anaerobic fungi? And/or want to know what research progress has been made in the last 5-10 years? Then there are two review articles, published this year by members of our network, that are great starting points for you:
Gruninger, Robert J., et al. “Anaerobic fungi (phylum Neocallimastigomycota): advances in understanding their taxonomy, life cycle, ecology, role and biotechnological potential.” FEMS microbiology ecology 90.1 (2014): 1-17.
Haitjema, Charles H., et al. “Anaerobic gut fungi: Advances in isolation, culture, and cellulolytic enzyme discovery for biofuel production.” Biotechnology and bioengineering (2014).