Protremaster is an extinct genus of sea star that lived in the Early Jurassic (Age range: 196.5 to 189.6 Ma). Its fossils have been found in the Lully Foothills Formation of Antarctica.
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