Cnidospora

Cnidospora is a defunct subphylum of microscopic spore-forming parasites in the defunct phylum Protozoa. The subphylum was divided into two classes,^[1] the Myxosporidea (now classified as higher-animals, i.e. Metazoa^[2]) and the Microsporidea (now classified as fungi).

References

1. Honigberg, B. M.; W. Balamuth; E. C. Bovee; J. O. Corliss; M. Gojdics; R. P. Hall; R. R. Kudo; N. D. Levine; A. R. Lobblich; J. Weiser (1964). "A Revised Classification of the Phylum Protozoa". Journal of Eukaryotic Microbiology. 11 (1): 7–20. doi:10.1111/j.1550-7408.1964.tb01715.x. PMID 14119564.
2. Smothers, J. F.; Von Dohlen, C. D.; Smith Jr, L. H.; Spall, R. D. (1994). "Molecular evidence that the myxozoan protists are metazoans". Science. 265 (5179): 1719–1721. Bibcode:1994Sci...265.1719S. doi:10.1126/science.8085160. PMID 8085160.