Capsaspora is a single-celled eukaryote which is a symbiont in the haemolymph of the tropical freshwater snail Biomphalaria glabrata.
Although it is an opisthokont, it seems not to fit in any of the established opisthokont lineages such as nucleariids or Mesomycetozoea. It is part of its own group, possibly together with Ministeria. This group is related to animals and choanoflagellates.
How animals (metazoans) originated from their single-celled ancestors may still remain a major question in biology. The research team from University of Barcelona has however, come up with new findings and Capsaspora owczarzaki has recently emerged as the prime candidate.
- ^ a b c Hertel L. A., Bayne C. J. & Loke E. S. (2002), "The symbiont Capsaspora owczarzaki, nov. Gen. Nov. Sp., isolated from three strains of the pulmonate snail Biomphalaria glabrata is related to members of the Mesomycetozoea", International Journal for Parasitology 32 (9): 1183, doi:10.1016/S0020-7519(02)00066-8, PMID 12117501
- ^ Shalchian-Tabrizi K, Minge MA, Espelund M, et al (2008), "Multigene phylogeny of choanozoa and the origin of animals", in Aramayo, Rodolfo, PLoS ONE 3 (5): e2098, doi:10.1371/journal.pone.0002098, PMC 2346548, PMID 18461162
- ^ Ruiz-Trillo, I; Lane, Ce; Archibald, Jm; Roger, Aj (Sep 2006), "Insights into the evolutionary origin and genome architecture of the unicellular opisthokonts Capsaspora owczarzaki and Sphaeroforma arctica.", The Journal of eukaryotic microbiology 53 (5): 379–84, doi:10.1111/j.1550-7408.2006.00118.x, PMID 16968456
- ^ Arnau Sebé-Pedrós, I. Ruiz-Trillo +3; Unexpected repertoire of metazoan transcription factors in the unicellular holozoan Capsaspora owczarzaki, Molecular Biology and Evolution (Sep 2010).
- ^ Carl Zimmer; From single cells, a vast kingdom arose, Science (March 14, 2011)