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Type: Correspondence
Published: 2021-06-03
Page range: 197–200
Abstract views: 263
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First Record of Psorospermium sp. (Class: Mesomycetozoea) in Northern Clearwater crayfish Faxonius propinquus Girard 1852 (Decapoda: Cambaridae) from Michigan, U.S.A.

Harold W. Manter Laboratory of Parasitology, Division of Parasitology, University of Nebraska State Museum, W 529 Nebraska Hall University of Nebraska-Lincoln, Lincoln, NE 68588-0514 USA


Psorospermium cf. haeckeli Hilgendorf 1883 is a unicellular, eukaryotic protozoan within the class Mesomycetozoea, phylogenetically situated near the animal-fungal divergence(Cavalier-Smith 1998; Ragan et al. 1998). Although only one species has been identified, there have been four morphotypes described in 17 species of crayfish from the Holarctic, Neotropical, and Australasian regions (Herbert 1987; Henttonen et al. 1992, 1994; Rug & Vogt 1994). However, molecular analyses of the internal transcribed spacer DNA suggest morphotypes may represent distinct species (Bangyeekhun et al. 2001).



  1. Bangyeekhun, E., Ryynänen, H.J., Henttonen, P., Huner J.V., Cerenius, L. & Söderhäll, K. (2001) Sequence analysis of the ribosomal internal transcribed spacer DNA of the crayfish parasite Psorospermium haeckeli. Diseases of Aquatic Organisms, 46, 217–222.

    Cavalier-Smith, T. (1998) Neomonada and the origin of animal and fungi. In: Coombs, G.H. & Vickerman, K. (Eds.), Evolutionary relationships among Protozoa. Kluwer Academic, Dordrecht, pp. 375–407

    Fitzpatrick, J.F. Jr (1967) The Propinquus group of the crawfish genus Orconectes (Decapoda: Astacidae). The Ohio Journal of Science, 67 (3), 129–172.

    Hobbs, H.H. Jr. (1972) Biota of Freshwater Ecosystems. Identification Manual. Vol. 9. Crayfishes (Astacidae) of North and Middle America. United States Government Printing Office, Washington, D.C., 180 pp.

    Henttonen, P., Lindqvist, O.V. & Huner, J.V. (1992) Incidence of Psorospermium sp. in several cultivated populations of crayfishes, Procambarus spp. (Decapoda, Cambaridae), in southern Louisiana. Journal of World Aquaculture Society, 23 (1), 31–37.

    Henttonen, P., Huner, J.V. & Lindqvist, O.V. (1994) Occurrence of Psorospermium sp. in several North American crayfish species, with comparative notes on Psorospermium haeckeli in the European crayfish, Astacus astacus. Aquaculture, 120 (3–4), 209–218.

    Henttonen, P., Huner, J.V. & Lindqvist, O.V. (1997) A comparison of the known life forms of Psorospermium spp. in freshwater crayfish (Arthropods, Decapoda) with emphasis on Astacus astacus L. (Astacidae) and Procambarus clarkii (Girard) (Cambaridae). Aquaculture, 149 (1–2), 15–30.

    Herbert, B.W. (1987) Notes on diseases and epibionts of Cherax quadricarinatus and C. tenuimanus (Decapoda, Parastacidae). Aquaculture, 64 (3), 165–173.

    Lee, B.J., Sis R.F., Lewis D.H. & Marks, J.E. (1985) Histology of select organs of the crawfish Procambarus clarkii maintained at various temperatures and levels of calcium and ammonia. Journal of the World Mariculture Society, 16 (1–4), 193–204.

    Overstreet, R.M. (1983) Metazoan symbionts of crustaceans. In: Bliss, D.E. (Ed.), The Biology of Crustacea. Vol. 6. Pathobiology. Academic Press, New York and London, pp. 155–250.

    Ragan, M.A., Goggins C.L., Cawthorn R.J., Cerenius L., Jamieson A.V.C., Plourd, S.M., Rand, T.G., Söderhäll, K. & Gutell, R.R. (1998) A novel clade of protistan parasites near the animal-fungal divergence. Proceedings of the National Academy of Sciences, USA, 93 (21), 11907–11912.

    Rudolph, E.H., Martínez A.W., Retamal F.A. (2007) First record of Psorospermium haeckelii Hilgendorf, 1883 in a South American Parastacid, the burrowing crayfish Parastacus pugnax (Poeppig, 1835) (Decapoda, Parastacidae). Crustaceana, 80 (8), 939–946.

    Rug, M. & Vogt, G. (1994) Developmental stages of the crayfish parasite Psorospermium haeckeli in thoracic arteries of Astacus astacus. Journal of Invertebrate Pathology, 64 (2), 153–155.

    Rug, M. & Vogt, G. (1995) Histology and histochemistry of developing and mature spore of two morphotypes of Psorospermium haeckeli. Freshwater Crayfish, 10, 374–384.

    Schneider, C.A., Rasband, W.S. & Eliceiri, K.W. (2012) NIH Image to ImageJ: 25 years of Image Analysis. Nature Methods, 9 (7), 671–675.

    Söderhäll, K. (1988) Fungal parasites and other diseases on freshwater crayfish. In: Kovanen, J. & Lappalainen, R. (Eds.), Raputalous 2000. Keski-Suomen Kalastuspiirin Kalastustoimisto, Tiedotus No. 5 Jyvässkylä, pp. 23–46.

    Vogt, G. & Rug, M. (1995) Microscopic anatomy and histochemistry of the crayfish parasite Psorospermium haeckeli. Diseases of Aquatic Organisms, 21, 79–90.

    Vogt, G. & Rug, M. (1999) Life stages and tentative life cycle of Psorospermium haeckeli, a species of the novel DRIPs clade from the animal-fungal dichotomy. Journal of Experimental Zoology, 283 (1), 31–42.;2-Q