Effusimentum triangulum

{{Short description|Species of fly}}

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| genus = Effusimentum

| species = triangulum

| authority = Barraclough, 1992{{cite journal |first=D.A.|last=Barraclough|year=1992|title=The systematics of the Australasian Dexiini (Diptera : Tachinidae : Dexiinae) with revisions of endemic genera|journal=Invertebrate Taxonomy | volume=6 |issue=5 |pages=1127–1371 |doi=10.1071/IT9921127}}

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Effusimentum triangulum is a species of fly in the family Tachinidae.{{cite web |last1=O’Hara |first1=James E. |last2=Henderson |first2=Shannon J. |first3=D. Monty |last3=Wood |title=Preliminary Checklist of the Tachinidae (Diptera) of the World|url=http://www.nadsdiptera.org/Tach/WorldTachs/Checklist/Tachchlist_ver2.1.pdf |website=Tachinidae Resources |access-date=2 March 2024 |date=5 March 2020}}