Scientific classification
Domain: Eukarya
(unranked) Opisthokonta
(unranked) Choanozoa or Holozoa
Class: Mesomycetozoea
Order: Dermocystida
Family: Dermocystidiaceae
Genus: Dermocystidium
Species: see text

Dermocystidium is a genus of cyst forming parasitic protists of fish,[1] which are the causative agents of dermocystidiosis.

Taxonomic History

The genus Dermocystidium was described in 1907. It was previously thought to be a genus of fungal parasites, related to thraustochytrids and labrynthulids (both those groups are now considered to be stramenopiles rather than fungi). Other biologists considered it to be a sporozoan protist.

It was subsequently identified as one of a group of fish parasites (the "DRIP clade") of previously uncertain affiliation, which were later identified as non-animal, non-fungi opisthokonts,[2] and renamed as Ichthyosporea, and after expansion as Mesomycetozoa. Parasites of crustacea (Dermocystidium daphniae) and molluscs (Dermocystidium marimum) placed in this genus have been found to be stramenopiles, and reclassified as Lymphocystidium daphniae and Perkinsus marinus respectively.

The frog parasite Dermocystidium ranae has recently been segregated as Amphibiocystidium ranae.[3]


  • Dermocystidium anguillae - a gill parasite of eels
  • Dermocystidium branchialis[4] - a gill parasite of salmonids
  • Dermocystidium cochliopodii[4]
  • Dermocystidium cyprini[4] - a gill parasite of carp[5]
  • Dermocystidium erschowii - a skin parasite of carp
  • Dermocystidium fennicum - a skin parasite of perch [6]
  • Dermocystidium gasterostei[4] - a parasite of sticklebacks[7]
  • Dermocystidium granulosum[4]
  • Dermocystidium guyenotii[4]
  • Dermocystidium koi[4] - a skin parasite of carp
  • Dermocystidium kwangtungensis[8]
  • Dermocystidium macrophagi
  • Dermocystidium nemachili[4]
  • Dermocystidium percae[4] - a skin parasite of perch [6]
  • Dermocystidium pusula[4]
  • Dermocystidium salmonis[4] - a gill parasite of salmon
  • Dermocystidium sinensis[8]
  • Dermocystidium vejdovskyi[4] - a parasite of pike


  1. ^ Feist SW, Longshaw M, Hurrell RH, Mander B (April 2004). "Observations of Dermocystidium sp. infections in bullheads, Cottus gobio L., from a river in southern England". J. Fish Dis. 27 (4): 225–31. doi:10.1111/j.1365-2761.2004.00535.x. PMID 15049890. 
  2. ^ 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. 
  3. ^ R. Pascolini, P. Daszak, A. A. Cunningham et al (August 2003). "Parasitism by Dermocystidium ranae in a population of Rana esculenta complex in Central Italy and description of Amphibiocystidium n. gen.". Diseases of Aquatic Organisms 56: 65–74. 
  4. ^ a b c d e f g h i j k l Index Fungorum
  5. ^ S. Červinka, J. Vítovec, J. Lom, J. Hoška, F. Kubů (November 1974). "Dermocystidiosis–a gill disease of the carp due to Dermocystidium cyprini n.sp.". J. Fish Biol. 6 (6): 689–699. doi:10.1111/j.1095-8649.1974.tb05112.x. 
  6. ^ a b Marketta Pekkarinen, Jiří Lom, Colleen A. Murphy, Mark A. Ragan and Iva Dyková (2003). "Phylogenetic Position and Ultrastructure of Two Dermocystidium Species (Ichthyosporea) from the Common Perch (Perca fluviatilis)". Acta Protozool. 42: 287–307. 
  7. ^ E. Elkan (1962). "Dermocystidium Gasterostei n. sp., A Parasite of Gasterosteus Aculeatus L. and Gasterosteus Pungitius L.". Nature 196 (4858): 958–960. doi:10.1038/196958a0. 
  8. ^ a b Qizhong Zhang, Zhijian Wang (2005). "Dermocystidium sp. infection in cultured juvenile southern catfish Silurus meridionalis in China". Diseases of Aquatic Organisms 65: 245–250.