Heteroecus is a genus of gall wasps in the family Cynipidae. There are about seven described species in the genus Heteroecus. They are only found on oaks (Quercus) of the section Protobalanus.
Species These seven species belong to the genus Heteroecus: Heteroecus crescentus (Lyon) Heteroecus dasydactyli (Ashmead, 1896) – woolly gall wasp Heteroecus devorus (Lyon) Heteroecus lyoni – Lyon's gall wasp Heteroecus melanoderma Kinsey, 1922 – golden gall wasp Heteroecus pacificus (Ashmead, 1896) – beaked spindle gall wasp Heteroecus sanctaeclarae – mushroom gall wasp
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