Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Genus Urophora

Thistle Stem Gall Fly - Urophora cardui - female Mating Flies With Stripped Wings - Urophora jaceana Fruit Fly - Urophora cardui - male Tephritidae: Urophora? - Urophora cardui - male Tiny beautifly fly for ID please - Urophora Fruit fly on flower - Urophora affinis - male Urophora quadrifasciata - Four-barred Knapweed Gall Fly - Urophora quadrifasciata - female Canada thistle stem gall fly - Urophora cardui
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon ("Acalyptratae")
Superfamily Tephritoidea
Family Tephritidae (Fruit Flies)
Subfamily Tephritinae
Tribe Myopitini
Genus Urophora
Explanation of Names
Urophora Robineau-Desvoidy 1830
7 spp. in our area, ~60 spp. total(1)
Only one other genus in the family has vein CuA2 straight or bowed out towards the wing tip.
native to the Palaearctic (all the spp. but one occur there), introduced as weed biocontrol agents to NA(1)(2)
Life Cycle
Some (all?) spp. overwinter in galls as third instar larvae
Several spp. have been introduced as biocontrols of non-native thistles and knapweeds (including the Yellow Starthistle Gall Fly, U. sirunaseva). U. kasachstanica & U. xanthippe are planned for release in w. US to control Russian knapweed(2)(3)