Information about the age, taxonomic identification, and location of all reported arthropod remains identified within rodent paleomiddens. Papers used in this study were found via a search on Web of Science, by reviewing the references of these papers, and by searching the Neotoma paleoecological database. <br> This dataset includes information about the paper that each observation was pulled from, the midden forming agent that produced the midden, and other miscelaneous information useful for interpreting and filtering the data.