Neuroterus washingtonensis (sexgen)

Family: Cynipidae | Genus: Neuroterus
Detachable: integral
Color: brown, pink, red, green
Texture:
Abundance: occasional
Shape:
Season: Spring
Alignment: integral
Walls: thick
Location: leaf midrib, on leaf veins
Form: abrupt swelling
Cells: polythalamous
Possible Range:i
Common Name(s): Midrib Gall Wasp
Synonymy:
Pending...
Slide 1 of 3
image of Neuroterus washingtonensis (sexgen)
image of Neuroterus washingtonensis (sexgen)
image of Neuroterus washingtonensis (sexgen)
image of Neuroterus washingtonensis (sexgen)
image of Neuroterus washingtonensis (sexgen)
image of Neuroterus washingtonensis (sexgen)
image of Neuroterus washingtonensis (sexgen)
image of Neuroterus washingtonensis (sexgen)
image of Neuroterus washingtonensis (sexgen)

Alternate generations of gall cynipids (Hymenoptera: Cynipidae) on Garry oak

Neuroterus washingtonensis, bisexual generation

[see paper for photo, figure 16 on page 11 of the pdf]

Gall. Irregular swellings on undersides of principal leaf veins, usually on young subterminal leaves; on trees of any size or age, but seldom on very young trees or next to the ground; more common in relatively open sunny exposures. The upper side of the leaf is contorted and reddish. The polythalamous galls contain from 4 to 85 cells, oriented towards the upper surface of the leaf, and vary in size from 7 to 55 mm, sometimes over the entire leaf length; they may be single, multiple or confluent. Occasionally more than one leaf is involved if the gall develops quickly on terminal growth. Many galls may occur over a relatively small area of a tree. Young galls are firm and white inside, green outside, becoming progressively paler and redder, finally becoming brown and hard after the insects have emerged. Adults emerge on the topside of the leaf in early summer, usually from individual exit holes. The galls persist long after the leaf parts weather away.

Adults of the bisexual generation emerge during late June. The polythalamous galls usually contain both males and females.

- David Evans: (1972) Alternate generations of gall cynipids (Hymenoptera: Cynipidae) on Garry oak©


Further Information:
Pending...

See Also:
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