Costosyrnola is a genus of sea snails, marine gastropod mollusks in the family Pyramidellidae, the pyrams and their allies. This genus was formerly authorized by Laws in 1937.
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