stentor muelleri stentor muelleri stentor muelleri, also called a trumpet ciliate, is a single-celled eukaryote which feeds on algae. it has a horned-shaped body and is usually 0.5–1.0 millimetre (0.02–0.04 in) long (exceptionally up to 3 mm or 0.12 in) and is found in freshwater bodies of water and sometimes estuaries. stentor muelleri is a heterotrich. stentor muelleri scientific classification domain: eukaryota clade: diaphoretickes clade: sar clade: alveolata phylum: ciliophora class: heterotrichea order: heterotrichida family: stentoridae genus: stentor species: s. muelleri binomial name stentor muelleri(bory st. vincent, 1824) ehrenberg, 1838 synonyms stentor mulleri