Phylum Aschelminthes refers to a group of tiny, microscopic organisms that are characterized by their unique body structure. These animals are found in a wide variety of habitats, ranging from freshwater to soil to marine environments. Synonyms for this phylum include Nemathelminthes, Nematoda, and roundworms. Aschelminthes are an extremely diverse group of organisms that play a crucial role in the ecosystem. They serve as decomposers, nutrient recyclers, and prey for larger animals. Understanding the different names and synonyms of Aschelminthes can help researchers and biologists identify these organisms and study their ecological significance.