Neocallimastix is a genus of obligately anaerobicrumenfungi in the family Neocallimastigaceae.[4] A specialised group of chytrids grow in the rumen of herbivorous animals, where they degrade cellulose and thus play a primary role in the complex microbial ecology of the rumen.
References
^Heath IB, Bauchop T, Skipp RA (1983). "Assignment of the rumen anaerobe Neocallimastix frontalis to the Spizellomycetales (Chytridiomycetes) on the basis of its polyflagellate zoospore ultrastructure". Canadian Journal of Botany. 61 (1): 295–307. doi:10.1139/b83-033.