A new actinospore type Unicapsulactinomyxon (Myxozoa), infecting the marine polychaete,Diopatra neapolitana(Polychaeta: Onuphidae) in the Aveiro Estuary (Portugal)

2011/02/24 by LUÍS F. RANGEL, Luís F. Rangel, GÁBOR CECH +5 · 4 citations
Biochemistry, Genetics and Molecular Biology · Environmental Science · #Myxozoan Parasites in Aquatic Species #Marine Ecology and Invasive Species #Aquatic Invertebrate Ecology and Behavior

paper · doi:10.1017/s0031182011000163

Abstract

This work reports a new type of actinospore, Unicapsulactinomyxon, which exhibits a unique morphological characteristic in that it has a single and large polar capsule (9·3×4·1 μm) (which possesses a longitudinally-folded polar filament) instead of the 3 polar capsules previously described for actinosporeans. The spore has a binucleated sporoplasm and 3 valves, each of which forms a long process. The spore has a total length of 241·3 μm. This parasite develops in groups of 8 inside pansporocysts in the coelomic cavity of the polychaete host. Molecular investigations on the SSU rDNA show that the new actinospore type is most closely related to Enteromyxum species (81-84% similarity). A survey of actinospore infections of the marine polychaete Diopatra neapolitana in 2007 and 2009, in the Aveiro Estuary (Portugal), showed an annual prevalence of 1·0% and 0·3%, respectively.

Citations

• Parasitology Meets Ecology on Its Own Terms: Margolis et al. Revisited
• Phylogenetic Relationships among Eight Eimeria Species Infecting Domestic Fowl Inferred Using Complete Small Subunit Ribosomal DNA Sequences

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• Molecular data infers the involvement of a marine aurantiactinomyxon in the life cycle of the myxosporean parasite Paramyxidium giardi (Cnidaria, Myxozoa)
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• Diversity and life cycle descriptions of freshwater actinospores (Myxozoa) infecting oligochaetes in Lake Balaton, Hungary
• Characterization of novel aurantiactinomyxon types (Cnidaria, Myxosporea) from the oligochaete Ilyodrilus templetoni (Southern, 1909), with a comprehensive phylogeny of the collective group

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