Location: upper leaf, lower leaf, leaf midrib, between leaf veins
Form: leaf blister
Cells: monothalamous
Possible Range:
The gall's range is computed from the range of all hosts that the gall occurs on. In some cases we have evidence that the gall does not occur across the full range of the hosts and we will remove these places from the range. For undescribed species we will show the expected range based on hosts plus where the galls have been observed.
Our ID Notes may contain important tips necessary for distinguishing this gall
from similar galls and/or important information about the taxonomic status of
this gall inducer.
Created Feb 4, 2026 1:47 PM UTC
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Last updated Feb 4, 2026 1:47 PM UTC
A Taxonomic Revision of the Genus Asteromyia (Diptera: Cecidomyiidae)
Raymond J. Gagné
(1968)
These are usually blue-gray, sometimes buff or with buff markings, 5-15 mm long; elliptical on hosts with wide leaves but elongate with rounded ends on hosts with narrow leaves; usually flat, but sometimes with a swollen appearance. These galls are occasionally found also on the stem. In the galls I have examined, there was only 1 larva/gall.
...
[He lists the following host records for this species, verified by both host and insect identification, most of which are now in the genusEricameria: Chrysothamnus affinis [Ericameria parryi var. affinis], C. albidus [E. albida], C. nauseosus [E. nauseosa var. nauseosa], C. nauseosus var. graveolens [E. nauseosa var. graveolens], C. greenei, C. plattensis [E. nauseosa var. nauseosa], C. viscidiflorus, Haplopappus armerioides [Stenotus armerioides], H. bloomeri [E. bloomeri], H. linearifolius [E. linearifolia].]
...
[He lists the following additional host species as possible Asteromyia hosts based on observations of galls only (no insect material available). They are included on this page based solely on the hosts' current inclusion in either Chrysothamnus, Ericameria, or near Stenotus. These could alternatively represent multiple undescribed Asteromyia species or host-range extensions of known species: Chrysothamnus depressus, C. paniculatus [E. paniculata], C. parryi [E. parryi], C. teretifolius [E. teretifolia], Haplopappus arborescens [E. arborescens], H. cooperi [E. cooperi], Chrysothamnus pulchellus [Lorandersonia pulchella] - near Stenotus (Nesom 2020)]
