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.
The plant-feeding gall midges of North America
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Undescribed species of Contarinia
The damage consists of a widened pair of leaves that are stuck together to form a flat, circular cell.
Unless noted otherwise in the ID Notes, observations of this gall are collected in the Observation Field Gallformers Code with value l-tridentata-clasping-leaf-gall on iNaturalist. You can view them here: