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Hyphae (or germ tubes) and schizonts of Ichthyophonus hoferi
Hyphae (or germ tubes) and schizonts of Ichthyophonus hoferi
Scientific classification e
(unranked): Choanozoa
Subphylum: Choanofila
Class: Ichthyosporea
Order: Ichthyophonida
Genus: Ichthyophonus
Plehn & Mulsow

Ichthyophonus is a genus of unicellular eukaryotic parasites of fish. They were once considered to be fungi, but phylogenetic evidence suggests they are protists related to both fungi and animals.[1][2]



  1. ^ Ragan MA, Goggin CL, Cawthorn RJ, et al. (October 1996). "A novel clade of protistan parasites near the animal-fungal divergence". Proc. Natl. Acad. Sci. U.S.A. 93 (21): 11907–12. doi:10.1073/pnas.93.21.11907. PMC 38157. PMID 8876236.
  2. ^ Hershberger PK, Pacheco CA, Gregg JL, Purcell MK, LaPatra SE (October 2008). "Differential survival of Ichthyophonus isolates indicates parasite adaptation to its host environment". J. Parasitol. (Submitted manuscript). 94 (5): 1055–9. doi:10.1645/GE-1553.1. PMID 18576846.