Jayatillake, R.A.2012-04-042012-04-041957Ceylon Journal of Science (Biological Sciences)1(2)pp.107-114https://dl.nsf.gov.lk/handle/1/7787Biological SciencesStomatophoraZeylanocystisGametocystsLife cycleOocystsParasitesMorphologyPheretima peguanaA re-investigation of the Acephaline gregarines of the Ceylon earthworm, Pheretima peguana RosaArticle