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INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY logo

Volume 72, Issue 7

Taxonomy of the anaerobic gut fungi (): a review of classification criteria and description of current taxa Open Access

Abstract

Members of the anaerobic gut fungi () reside in the rumen and alimentary tract of larger mammalian and some reptilian, marsupial and avian herbivores. The recent decade has witnessed a significant expansion in the number of described genera and species. However, the difficulties associated with the isolation and maintenance of strains has greatly complicated comparative studies to resolve inter- and intra-genus relationships. Here, we provide an updated outline of taxonomy. We critically evaluate various morphological, microscopic and phylogenetic traits previously and currently utilized in taxonomy, and provide an updated key for quick characterization of all genera. We then synthesize data from taxa description manuscripts, prior comparative efforts and molecular sequence data to present an updated list of genera and species, with an emphasis on resolving relationships and identifying synonymy between recent and historic strains. We supplement data from published manuscripts with information and illustrations from strains in the authors’ collections. Twenty genera and 36 species are recognized, but the status of 10 species in the genera , and remains uncertain due to the unavailability of culture and conferre (.) strains, lack of sequence data, and/or inadequacy of available microscopic and phenotypic data. Six cases of synonymy are identified in the genera and , and two names in the genus are rejected based on apparent misclassification.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): fungi , herbivores and Neocallimastigomycota
Funding
This study was supported by the:
  • National Science Foundation (Award 2029478)
    • Principle Award Recipient: NohaH. Youssef
  • National Science Foundation (Award 2029478)
    • Principle Award Recipient: MostafaS. Elshahed
© 2022 The Authors
  • This is an open-access article distributed under the terms of the Creative Commons Attribution NonCommercial License. This article was made open access via a Publish and Read agreement between the Microbiology Society and the corresponding author’s institution.
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2022-07-01
2024-04-24
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Taxonomy of the anaerobic gut fungi (Neocallimastigomycota): a review of classification criteria and description of current taxa
Int J Syst Evol Microbiol 72, 005322 (2022); https://doi.org/10.1099/ijsem.0.005322
/content/journal/ijsem/10.1099/ijsem.0.005322
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