Harmandiola p-tremuloides-like-tremulae
The inducer of this gall is unknown or undescribed.
Family: Cecidomyiidae | Genus: Harmandiola
Hosts: Populus tremuloides
Detachable: bothi
Color: pink, red, green
Texture: hairless
Abundance:
Shape: globular
Season: Summer
Related:
Alignment: erect
Walls: thick
Location: upper leaf, leaf midrib, on leaf veins
Form:
Cells: monothalamous
Possible Range:i
Common Name(s):
Synonymy: 
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.
Gallformers ID Notes
“
A green to pink-red pea gall on the midrib or major side vein of Populus tremuloides. The gall is nearly entirely found on the upper side of the leaf, and appears detachable, but its exit hole is found on the lower side at the contact point. Observed from Alaska to Nova Scotia south to New Mexico, fresh between June and August.
This gall is nearly identical to that of Harmandiola tremulae, found on Populus tremula in Europe. It is possible that the same species occurs holarctically on both hosts but no existing literature seems to confirm this.
This gall morphotype can be distinguished from other midge galls on Populus leaves by the following traits:
- Larva concealed within galled tissue, protruding only on the upper side of the leaf
- Thick walled, nearly spherical, large
- Gallformers Contributors: (2024) Gallformers ID Notes©
Further Information:
Pending...
See Also:
Unless noted otherwise in the ID Notes, observations of this gall are collected in the Observation Field Gallformers Code with value p-tremuloides-like-tremulae on iNaturalist. You can view them here:
