The Genus Stentor is a group of unicellular, ciliate protists that are distinguishable by their trumpet-shaped body. These organisms are commonly found in freshwater lakes and ponds, and are known for their ability to regenerate parts of their body. There are several synonyms for the Genus Stentor, including Didinium, Colpidium, Urocentrum, and Blepharisma. Despite being grouped under different synonyms, these organisms share several characteristics with the Genus Stentor, including their trumpet-shaped body and ciliate structure. The synonymity of these organisms highlights the complexity and diversity of protists, and the need for taxonomic revision to accurately classify them.