Twig-gall
Guides
Disholcaspis canescens
Round Honeydew Gall Wasp
Disholcaspis canescens is a species of gall wasp in the family Cynipidae, known for inducing distinctive galls on oak trees. Like other members of the genus Disholcaspis, this species produces round, detachable galls on oak twigs. The genus is notable for having eliminated males from the life cycle in all known species, with females reproducing parthenogenetically and producing only female offspring. The specific epithet 'canescens' refers to a grayish or hoary appearance, though the precise application to this species' galls or wasps is not detailed in available sources.
Disholcaspis prehensa
clasping twig gall wasp
Disholcaspis prehensa is a gall-inducing cynipid wasp native to California that induces distinctive galls on scrub oak and leather oak. The species exhibits heterogony, alternating between sexual and asexual generations that produce two morphologically different gall types. The asexual generation forms conspicuous mushroom-shaped twig galls with clasping bases, while the sexual generation produces small, hidden bud galls.
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quercusglobulus
Round Bullet Gall Wasp
Disholcaspis quercusglobulus, commonly known as the round bullet gall wasp, is a species of cynipid gall wasp that forms distinctive round, detachable galls on oak twigs. Unlike many gall wasps that affect leaves, this species targets twigs of white oak and related species. The species exhibits an unusual reproductive strategy: all galls produce only female wasps, which emerge in fall and immediately lay eggs in twigs to produce the next generation without males. This parthenogenetic life cycle has been documented across multiple Disholcaspis species.
Disholcaspis rubens
Disholcaspis rubens is a species of gall wasp in the family Cynipidae, first described by Gillette in 1893. Like other members of its genus, it induces distinctive galls on oak host plants. Species in Disholcaspis are known for producing twig galls rather than leaf galls, and many exhibit parthenogenetic reproduction with all-female generations. The genus is characterized by enlarged venom glands, which are implicated in the chemical induction of gall formation.
Taxodiomyia cupressi
Cypress Twig Gall Midge, Cypress Flower Gall Midge
Taxodiomyia cupressi is a gall midge (Diptera: Cecidomyiidae) that induces distinctive twig galls on cypress trees (Taxodium spp.). The species forms spongy, globular galls on new growth that are initially snow-white and turn brown with age. It has been documented in central Illinois and Missouri, with observations on cultivated bald cypress outside its native range. The midge undergoes complete metamorphosis with multiple generations per year, overwintering as larvae within fallen galls.
gall-midgeCecidomyiidaeTaxodiumbald-cypressgall-formerpestDipterainsectphytophagouscomplete-metamorphosismultiple-generationsoverwintering-larvaeornamental-pestriparianwetlandMissouriIllinoiscentral-USAtwig-gallspongy-gallwhite-gallbrown-gallexit-holesynchronized-emergencehost-specificTaxodiomyia-cupressiananassasynonymSchweinitz-1822Osten-Sacken-1878Zapatella quercusmedullae
Oak Rough Bulletgall Wasp
Zapatella quercusmedullae is a gall wasp in the family Cynipidae that induces galls on oak trees (Quercus). The species was transferred from Andricus to Zapatella based on phylogenetic studies. It produces distinctive bullet-shaped galls on twigs and branches of host oaks. The wasp has an alternating sexual and asexual generation life cycle typical of many Cynipini.