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Life stages and tentative life cycle ofPsorospermium haeckeli, a species of the novel DRIPs clade from the animal-fungal dichotomy

1999; Wiley; Volume: 283; Issue: 1 Linguagem: Inglês

10.1002/(sici)1097-010x(19990101)283

1097-010X

G�nter Vogt, Melanie Rug,

Marine Biology and Ecology Research

Journal of Experimental ZoologyVolume 283, Issue 1 p. 31-42 Immunology and Parisitology Life stages and tentative life cycle of Psorospermium haeckeli, a species of the novel DRIPs clade from the animal-fungal dichotomy Günter Vogt, Corresponding Author Günter Vogt [email protected] Department of Zoology 1, University of Heidelberg, 69120 Heidelberg, GermanyDepartment of Zoology 1 (Morphology & Ecology), University of Heidelberg, Im Neuenheimer Feld 230, 69120 Heidelberg, Germany===Search for more papers by this authorMelanie Rug, Melanie Rug Department of Zoology 1, University of Heidelberg, 69120 Heidelberg, GermanySearch for more papers by this author Günter Vogt, Corresponding Author Günter Vogt [email protected] Department of Zoology 1, University of Heidelberg, 69120 Heidelberg, GermanyDepartment of Zoology 1 (Morphology & Ecology), University of Heidelberg, Im Neuenheimer Feld 230, 69120 Heidelberg, Germany===Search for more papers by this authorMelanie Rug, Melanie Rug Department of Zoology 1, University of Heidelberg, 69120 Heidelberg, GermanySearch for more papers by this author First published: 13 January 1999 https://doi.org/10.1002/(SICI)1097-010X(19990101)283:1 3.0.CO;2-QCitations: 15AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract Psorospermium haeckeli, an enigmatic parasite of freshwater crayfish, recently was assigned to the newly established DRIPs clade, which is considered to constitute the most basal branch of the Animalia close to the animal-fungal dichotomy (Ragan et al. [1996] Proc. Natl. Acad. Sci. USA, 93:11907–11912). So far, the only lifestages known were immobile sporocysts located within the connective tissue of various organs of crayfish, and smaller developmental stages of these sporocysts. After prolonged incubation of connective tissue from infected crayfish in freshwater we have obtained free-living amoeboid organisms that hatched from the sporocysts in the decaying tissue. The results of further experiments on transmission of the parasite as well as a futile search for additional hosts suggest a diphasic life cycle of Psorospermium haeckeli comprising a histozoic and a free-living phase. The histozoic and free-living stages were investigated by light and electron microscopy and compared to the life stages of other DRIPs species, protists, and lower animal and fungal groups. The morphological characters elaborated fit well into the proposed taxonomic position of the parasite close to the animal-fungal dichotomy. Therefore, together with the other DRIPs species, Psorospermium haeckeli may give an idea of the types of organisms from which animals and fungi may have evolved. J. Exp. Zool. 283:31–42, 1999. © 1999 Wiley-Liss, Inc. References Alderman DJ, Polglase JL. 1988. Pathogens, parasites, and commensals. In: DM Holdich, RS Lowery, editors. Freshwater crayfish: biology, management and exploitation. London: Croom Helm. p 167–212. Baldauf SL, Palmer JD. 1993. Animals and fungi are each other's closest relatives: congruent evidence from multiple proteins. Proc Natl Acad Sci USA 90: 11558–11562. Barr DJS. 1982. Eumycota. In: SP Parker, editor. 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