Masillastega ("Messel roof") is an extinct aquatic bird from the Eocene of Germany. It is an ancestor to modern gannets and boobies, but unlike these birds it occurred in freshwater environments. It was found in the lake that would become the Messel Pit.
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