👉 Microcanthinae is a phylum of small, single-celled organisms that includes amoebae and other unicellular eukaryotes. They are characterized by their small size (less than 10 nanometers in diameter), which allows them to be easily observed with a microscope or electron microscopes. Microcanthinae play crucial roles in the aquatic environment as primary producers, decomposers, and scavengers of dead organic matter.