Template:Shannon, 1916

• Shannon, R.C. 1916. Appendix. Systematic and synonymic notes. Pp. 195–203. In: Banks, N., Greene, C.T., McAtee, W.L. & Shannon, R.C., District of Columbia Diptera: Syrphidae. Proceedings of the Biological Society of Washington 29: 173–203. BHL  
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References

• Nomenclator Detail Record. Syrphus knabi Shannon, 1916: 200. Record #45947. Systema Dipterorum (www.diptera.org) version 7.1, last updated 14 July 2026. Evenhuis, N.L. & Pape, T.. Accessed: 29 April 2025.