This project provides the genome assembly of Oscheius sp. DF5083. The assembly is provided by the Wellcome Sanger Institute's 959 Nematode Genomes project in collaboration with the Tree of Life programme Genome Engine teams. The data under this project are made available subject to the Wellcome Sanger Institute Data Sharing policy (see https: //www.sanger.ac.uk/about/who-we-are/research-policies/open-access-science/).