BioLib and the Global Biodiversity Information Facility lists:4
Papp, L; Földvári, M (1997). "Sphyracephala europaea sp. n. (Diptera: Diopsidae) from Hungary represents a family new to Europe" (PDF). Folia Entomologica Hungarica. 58. Hungary: 137–146. Retrieved 23 January 2012. http://publication.nhmus.hu/pdf/folentom/FoliaEntHung_1997_Vol_58_137.pdf ↩
Global Biodiversity Information Facility: Sphyracephala Say, 1828 (retrieved 23 March 2024) https://www.gbif.org/species/1551011 ↩
Feijen, Hans R.; Martin, Ralph; Feijen, Cobi (2017-11-30). "The occurrence of stalk-eyed flies (Diptera, Diopsidae) in the Arabian Peninsula, with a review of cluster formation in the Diopsidae". Tijdschrift voor Entomologie. 160 (2): 75–88. doi:10.1163/22119434-00002065. ISSN 2211-9434. https://brill.com/view/journals/tve/160/2/article-p75_2.xml ↩