Xanthoteras teres (formerly Trigonapsis teres), the ball-tipped gall wasp, is a species of cynipid wasp that produces galls on oak trees in Oregon and California in North America.

[1][2] The wasp oviposits on the leaves of Oregon oaks and leather oaks, resulting in a somewhat Suessian gall that has an upright stalk topped by a fuzzy ball.

[1] The species was first described by Lewis Hart Weld in 1926.

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