Template:Szilády, 1940

• Szilády, Z. 1940. Über Palaearktischen Syrphiden. IV. Annales Historico-Naturales Musei Nationalis Hungarici 33: 54–70. Full text  
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References

• Nomenclator Detail Record. Syrphus torvus var. discretus Szilády, 1940: 63. Record #44602. Systema Dipterorum (www.diptera.org) version 6.1, last updated 29 April 2025. Evenhuis, N.L. & Pape, T.. Accessed: 29 April 2025.