Mononchoides sp. is a quite common genus in the phylum of the nematoda and by far the most diverse genus of the family of the Diplogastridae. It has been described to live in various terrestrial habitats and is often associated with compost, dung, mud, other decaying materials and different kinds of beetles. Some have even been described from fresh water and marine habitats. In 2011, a new species has been described by Steel et al. This species was isolated from compost during the composting process and was named Mononchoides composticola.