Harmandiola p-tremuloides-lips-gall
The inducer of this gall is unknown or undescribed.
Family: Cecidomyiidae | Genus: Harmandiola
Hosts: Populus tremuloides
Detachable: integral
Color: green
Texture: hairless, succulent
Abundance:
Shape: globular
Season: Spring
Related:
Alignment: integral
Walls: thick, slit
Location: upper leaf, lower leaf, between 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
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A rough, hairless, light-green to pink-red gall on the lamina of Populus tremuloides, protroding on both sides, with a globular mass below and a puckered pair of protruding lips on either side of a slit-like opening above. It varies from nearly globular to flattened against the leaf. Either single or in scattered groups. Observed from Alaska to Quebec and south to Colorado between May and September.
This gall resembles that of Harmandiola cavernosa known in Europe from Populus alba and tremula.
This gall morphotype can be distinguished from other midge galls on Populus leaves by the following traits:
- Larva concealed within galled tissue, protruding primarily on the lower side of the leaf
- Noticeably protruding lips on the upper side of the leaf surrounding a linear slit exit hole
- 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-lips-gall on iNaturalist. You can view them here:
