Polystepha symmetrica

Family: Cecidomyiidae | Genus: Polystepha
Detachable: integral
Color: brown, red, green, tan
Texture: hairless
Abundance: occasional
Shape: hemispherical
Season: Fall, Summer
Related:
Alignment: erect, integral
Walls: thick
Location: upper leaf, lower leaf, between leaf veins
Form:
Cells: monothalamous, polythalamous
Possible Range:i
Common Name(s): Cecidomyia symmetrica
Synonymy:
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image of Polystepha symmetrica
image of Polystepha symmetrica
image of Polystepha symmetrica
image of Polystepha symmetrica
image of Polystepha symmetrica
image of Polystepha symmetrica
image of Polystepha symmetrica
image of Polystepha symmetrica
image of Polystepha symmetrica
image of Polystepha symmetrica
image of Polystepha symmetrica
image of Polystepha symmetrica
image of Polystepha symmetrica
image of Polystepha symmetrica
image of Polystepha symmetrica

31st Report of the State Entomologist on Injurious and Other Insects of the State of New York

Cincticornia symmetrica

This deformity has been described by Osten Sacken as a hard, red gall on the leaves of different kinds of oak. It is small and round, between one-twentieth and one-tenth of an inch in diameter, though more commonly assuming an irregular shape by the coalescence of several galls. He states that this gall occurs in large numbers on the leaves of Quercus falcata in autumn, sometimes occupying almost the entire leaf and having exactly the same size and shape on both surfaces. A study of the types of this gall in the Museum of Comparative Zoology at Cambridge, showed that it was very close to, if not identical with, that of Cincticornia pilulae. Beutenmueller states that it differs from the more common C. pilulae by protruding equally on both surfaces of the leaf, and adds that it has not been found in the vicinity of New York City. The larvae in the collections of the United States National Museum and labeled as having come from this gall, belong to the genus Cincticornia and possibly may be different from those of C. pilulae. It is provisionally placed next this common species.

- EP Felt: (1915) 31st Report of the State Entomologist on Injurious and Other Insects of the State of New York©

Reference: https://www.biodiversitylibrary.org/page/36619989#page/555/mode/1up


Further Information:
Pending...

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