Numbers
Nearctica.com lists 89 species.
Arnett, p. 859, lists 86 species.
(1).
Over 250 species worldwide.
Identification
Larvae white to very pale orange. Pupae usually light orange turning to dark orange or even red with age. Antennal bases of most goldenrod gall species do not develop into conspicuous horns. Abdominal segments with spicules.
Adults vary considerably in size.
Life Cycle
They induce galls in different plant parts, rhizomes, stems, leaves, flowers, etc. Some species have one generation per year, others have one fast growing generation in the spring and a slow growing one in summer.
Remarks
Most species are restricted to galls of the family Asteraceae, particularly the tribe Anthemidae, (goldenrods, 16 species).
Contributed by
Cotinis on 28 January, 2005 - 11:34pm
Additional contributions by
Beatriz MoissetLast updated 20 July, 2009 - 11:48am
