Stemmops is a genus of small theridiid spiders that mostly occur in America, from the United States to Brazil. In 1998, two species were found in China, in addition to S. nipponicus, which is found in Japan, Korea and China.
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0