Gallformers

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Harmandiola castaneae

Family: Cecidomyiidae | Genus: Harmandiola

Hosts: Castanea dentata

Detachable: integral

Color: red, yellow, green

Texture: hairless, leafy, succulent

Abundance:

Shape: globular, spindle, cluster

Season: Spring, Summer

Related:

Alignment: integral

Walls: thin

Location: upper leaf, lower leaf, leaf midrib, on leaf veins

Form: leaf blister, tapered swelling

Cells: monothalamous

Possible Range:ⁱ

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Notes

Cecidomyia castaneae

Photo by F. A. Stebbins accompanying her original description of "Cecidomyia? castaneae", of leaf damage on leaf of American chestnut, Castanea dentata, near Springfield, Massachusetts.

Image by Fannie Adelle Stebbins © Public Domain / CC0

Insect galls of Springfield, Massachusetts, and vicinity

“

[As Cecidomyia? castaneae]:

"An ellipsoidal, monothalamous gall found singly or in small groups near the base of leaves of chestnut, Castanea dentata, projecting from under side of the principal veins, occasionally from the midrib, seeming to be an enlargement of the vein.... The surface is smooth like the surface of the leaf. The walls are succulent .... light yellow-green, a few tinged with red ... collected in June..."

”

- FA Stebbins: (1910) Insect galls of Springfield, Massachusetts, and vicinity^©

Reference: https://www.biodiversitylibrary.org/page/33538414#page/19/mode/1up

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