spangle gall
noun
1- a reddish disc-shaped gall that forms on the undersides of oak leaves in response to the developing larva of a gall wasp. It results from eggs laid in the summer and alternates with the currant gall.虫瘿。
1.1
- The wasp is Neuroterus quercusbaccarum, family Cynipidae.产生虫瘿的是葡萄形瘿蜂（拉丁名Neuroterus quercusbaccarum）, 瘿蜂科。