Accessibility navigation


Diversity and systematics of the Malacosporea (Myxozoa)

Tops, S., Curry, A. and Okamura, B. (2005) Diversity and systematics of the Malacosporea (Myxozoa). Invertebrate Biology, 124 (4). pp. 285-295. ISSN 1077-8306

Full text not archived in this repository.

It is advisable to refer to the publisher's version if you intend to cite from this work. See Guidance on citing.

To link to this item DOI: 10.1111/j.1744-7410.2005.00026.x

Abstract/Summary

Myxozoans belonging to the recently described class Malacosporea parasitize freshwater bryozoans during at least part of their life cycle. There are at present only two species described in this class: Buddenbrockia plumatellae and Tetracapsuloides bryosalmonae. The former can exist as vermiform and sac-like stages in bryozoan hosts. The latter, in addition to forming sac-like stages in bryozoans, is the causative agent of salmonid proliferative kidney disease (PKD). We undertook molecular and ultrastructural investigations of new malacosporean material to further resolve malacosporean diversity and systematics. Phylogenetic analyses of 18S rDNA sequences provided evidence for two new putative species belonging to the genus Buddenbrockia, revealing a two-fold increase in the diversity of malacosporeans known to date. One new malacosporean is a vermiform parasite infecting the bryozoan Fredericella sultana and the other occurs as sac-like stages in the rare bryozoan, Lophopus crystallinus. Both bryozoans represent new hosts for the genus Buddenbrockia. Our results have established that the malacosporean which infected F. sultana was not a vermiform stage of T. bryosalmonae, although it was collected from a site endemic for PKD. Ultrastructural investigation of new material of B. plumatellae revealed the presence of numerous external tubes associated with developing polar capsules, confirming that the absence of external tubes should no longer be considered as a character of the class Malacosporea.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Biological Sciences
ID Code:10397
Uncontrolled Keywords:Buddenbrockia, Tetracapsuloides, freshwater bryozoans, ultrastructure, PROLIFERATIVE KIDNEY-DISEASE, CRISTATELLA-MUCEDO BRYOZOA, 18S RDNA, SEQUENCES, TETRACAPSULA-BRYOSALMONAE, PKX ORGANISM, CAUSATIVE AGENT, SALMONID FISH, PARASITES, PHYLACTOLAEMATA, BUDDENBROCKIA

University Staff: Request a correction | Centaur Editors: Update this record

Page navigation