Nucleophaga is a genus of eukaryotic microorganisms that are internal parasites of amoeba, flagellates, and ciliates.[1]

Scientific classification

Dangeard 1895
Type species
Nucleophaga amoebae
Dangeard 1895

Morphology and life cycleEdit

Nucleophaga grows within the nucleus of its host cell.[2] Its spores are ingested by the host and migrate to the nucleus. Once in the nucleus, the spores germinate giving rise to naked plasmodia in contact with the host's karyoplasm. It develops pseudopodia-like projections that may be involved in osmotrophy or phagocytosis. The Nucleophaga cells continue to enlarge until a cell wall replaces the projections and the Nucleophaga cytoplasm is divided into spores.[3]


Described by Dangeard in 1895, Nucelophaga was placed in Olpidiaceae, Chytridiales.[2][1] Molecular phylogenetic studies have placed some members in the Cryptomycota/Rozellomycota.[3][4]


As according to a taxonomic summary.[1]


  1. ^ a b c Blackwell, Will H.; Letcher, Peter M.; Powell, Martha J. (2019). "Review of Nucleophaga (a primitive, 'cryptomycotan' genus): Summary of named and unnamed species, with discussion of contemporary and historical observations". Phytologia. 101: 1–18.
  2. ^ a b Sparrow F.K. (1060). Aquatic Phycomycetes (second ed.). The University of Michigan Press.
  3. ^ a b Corsaro, Daniele; Walochnik, Julia; Venditti, Danielle; Muller, Karl-Dieter; Hauroder, Barbel; Michel, Rolf (2014). "Rediscovery of Nucleophage amoebae, a novel member of the Rozellomycota". Parasitology Research. 113: 4491–4498.
  4. ^ Corsaro, Daniele; Michel, Rolf; Walochnik, Julia; Venditti, Danielle; Muller, Karl-Dieter; Hauroder, Barbel; Wylezich, Claudia (2016). "Molecular identification of Nucelophaga terricolae sp. nov. (Rozellomycota), and new insights on the origin of the Microsporidia". Parasitology Research. 115: 303–3011.