翅瓣
The team also noted a hinged flap near the base of the wing, called an Alula, which is deployed at right angles to the wing, which may be being used as a air flow-control device. 这个小组还注意到，翼根附近铰接的副翼，被称为小翼的，对翼成直角配置，它可能被用来作为空气流量控制装置。
zoology) pertaining to alulae. （动物学）与昆虫的翅翼有关。
alula 小翼羽
