Molecular Biology and Evolution 19:968-971 (2002)
© 2002 Society for Molecular Biology and Evolution
Orphan Worm Finds a Home: Buddenbrockia is a Myxozoan
School of Animal and Microbial Sciences, The University of Reading, Whiteknights, Reading, UK
The strange wormlike Buddenbrockia plumatellae and the spore-forming myxozoans are among the most enigmatic animals known to science. Dumortier and van Beneden (1850)
first noted worm-shaped parasites inside freshwater bryozoan colonies; these animals were later described by Schröder (1910,
1912)
and named B. plumatellae (fig. 1
). This species is almost unique in never having been confidently assigned to an animal phylum, nor has a monotypic phylum been erected for it. Indeed, Nielsen (1995, p. 437)
lists Buddenbrockia as one of the last "five enigmatic taxa." The vermiform shape and the presence of four longitudinal muscle blocks clearly suggest a placement within the Bilateria, perhaps related to nematodes, although it should be noted that Buddenbrockia has neither a gut nor a clear central nervous system.
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