Induced-gall

Guides

• Acraspis

  Acraspis is a genus of gall wasps in the family Cynipidae. Species in this genus induce distinctive galls on oak leaves (Quercus spp.), including the jewel oak gall and oak pea gall. The genus exhibits specialized host associations with oaks and has been documented to employ spacing strategies that reduce parasitoid attack rates.

  gall-waspCynipidaeoak-gallQuercusparasitoidchalcidAcraspis-hirtajewel-oak-gallplant-manipulationinduced-gall

• Atrusca

  Atrusca is a genus of gall wasps in the family Cynipidae, tribe Cynipini, comprising approximately 42 species distributed across North and Central America. These tiny wasps are specialized herbivores that induce characteristic galls on oak (Quercus) host plants. The genus forms a phylogenetically distinct clade most closely related to Cynips, Philonix, and Xanthoteras, and morphologically resembles Cynips and Antron. Species exhibit high host specificity, with each typically restricted to one or a few closely related oak species.

  gall-waspCynipidaeoak-gallQuercusherbivoreparasitoidNorth-AmericaMexicoCentral-AmericaCynipiniinduced-gallplant-insect-interactionhost-specificityalternation-of-generationsasexual-reproductionsexual-reproductionecosystem-engineerinquilinehyperparasitoidbella-species-complexphylogeneticstaxonomyKinsey-1930

• Caryomyia hirtiglobus

  Hickory Woody Globe Gall Midge

  Caryomyia hirtiglobus is a gall midge in the family Cecidomyiidae, described by Gagné in 2008. The species induces woody, spherical galls on hickory trees (Carya spp.). It is one of several Caryomyia species associated with hickory, with its specific epithet 'hirtiglobus' referring to the hairy, globe-shaped galls it produces. The species has been documented in eastern North America where its host hickories occur.

  gall-midgeCecidomyiidaehickoryCaryaplant-gallCaryomyiaforest-insectherbivoreinduced-gallwoody-gall

• Pinyonia edulicola

  Pinyon Spindle Gall Midge, Pinyon Spindlegall Midge

  A tiny gall-forming midge in the family Cecidomyiidae that induces spindle-shaped galls on developing pinyon pine needles. Adult emergence occurs in mid-June to mid-July. Heavy infestations cause premature needle drop and substantial defoliation, making it a pest of concern in urban landscapes of Colorado.

  gall-midgepestconifer-pesturban-entomologyCecidomyiidaePinus-edulisColoradoinduced-gallneedle-galldefoliator