1) Zoology Department, College of Science, King Saud University, Saudi Arabia; 2) Department of Cell Biology, Zoological Institute,
University of Copenhagen, Copenhagen, Denmark; 3Private Laboratory, Faaborg, DenmarkA medium-sized, pink heterotrich ciliate was found in hypersaline ponds in the inland Al-Hassa Oasis. The morphology and
infraciliature were studied in vivo, and in silver carbonate and protargol impregnated cells. The organism has a slender filiform macronucleus
without terminal swellings. The morphology and morphometric data agree largely with the original description of Blepharisma intermedium
Padmavathi, 1959; however, the present organism has fewer kineties and both kinetosomes of somatic dikinetids are ciliated. The findings
are discussed on the basis of a summary made from available data on other Blepharisma species with a filiform macronucleus
