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

Luís F. Rangel, Gábor Cech, Csaba Székely, Maria J. Santos

Research output: Contribution to journalArticle

22 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)698-712
Number of pages15
JournalParasitology
Volume138
Issue number6
DOIs
Publication statusPublished - May 1 2011

Keywords

  • Diopatra neapolitana
  • Myxozoa
  • Portugal
  • SSU rDNA
  • Unicapsulactinomyxon
  • actinospores
  • developmental stages
  • polychaete
  • prevalence

ASJC Scopus subject areas

  • Parasitology
  • Animal Science and Zoology
  • Infectious Diseases

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