Crassimarginatidae is an extinct family of fossil sea snails, Paleozoic gastropod mollusks. This family is unassigned to superfamily. This family has no subfamilies.
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