Crambus alexandrus
{{Short description|Species of moth}}
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| taxon = Crambus alexandrus
| authority = Kirpichnikova, 1979
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Crambus alexandrus is a moth in the family Crambidae. It was described by Valentina A. Kirpichnikova in 1979. It is found in Russia (Kuril Islands){{cite web |last=Nuss |first=M. |display-authors=etal |date=2003–2014 |url=http://globiz.pyraloidea.org/Pages/Reports/TaxonReport.aspx |title=GlobIZ search |website=Global Information System on Pyraloidea |accessdate=July 15, 2014}} and Japan.[http://www.jpmoth.org/Crambidae/Crambinae/Crambus_alexandrus.html Japanese Moths]