Ptilobactrum is a genus of hoverflies, with two known species. They have very broad heads and their basoflagellomeres are elongate and densely pilose in males.
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