Molecular Phylogeny of a Potentially Parasitic Dinoflagellate Isolated From the Solitary Radiolarian, Thalassicolla Nucleata

J Eukaryot Microbiol. Jan-Feb 2006;53(1):43-5. doi: 10.1111/j.1550-7408.2005.00071.x.


Thalassicolla nucleata, a solitary radiolarian, has been described as being parasitized by two dinoflagellates, Solenodinium (Syndiniales) and Caryotoma (Blastodiniales). Several T. nucleata were stripped of their extracapsular material and allowed to regenerate their rhizopodial structures without symbionts. Within a week, two were observed to disintegrate, leaving behind non-pigmented swimming dinoflagellate cells. Identical full-length ribosomal sequences were recovered from both samples. Upon alignment and phylogenetic analysis, it was determined that these putative parasite sequences were distinct from Scrippsiella nutricula (the dinoflagellate symbiont of the host), and also from all other dinoflagellate parasites sequenced to date.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Animals
  • DNA, Protozoan / analysis
  • Dinoflagellida / genetics*
  • Dinoflagellida / isolation & purification*
  • Eukaryota / parasitology*
  • Molecular Sequence Data
  • Phylogeny*
  • Sequence Analysis, DNA


  • DNA, Protozoan

Associated data

  • GENBANK/DQ116021
  • GENBANK/DQ116022